• Author / Uploaded
• Cecilia Sierra Castaño

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UNIT

1

EXTENSION Name:

The exoskeleton Date:

Class:

Can you imagine a human-sized spider? Luckily, spiders of that size simply cannot exist. The exoskeleton of an arthropod is very strong and resistant, but in a human-sized animal, it would be so heavy that it wouldn’t allow movement. The joints of the exoskeleton are very flexible and they allow the spider to make lots of different movements.

11

Complete the advantages and disadvantages of having an exoskeleton. Advantages: Disadvantages:

Which of the following images looks like an exoskeleton? Why?

3

The exoskeleton of an arthropod doesn’t grow. Every time that it removes its exoskeleton, it creates a new one. Investigate. What is this process called? Explain in your own words.

Natural Science 4. Unit 1

PHOTOCOPIABLE MATERIAL

REINFORCEMENT

UNIT

1 1

Differentiating animals

Name:

Date:

Class:

Virginia wants to make an animal sticker album. Answer the questions based on the stickers below.

a) Which page should Virginia put each of the stickers on? Vertebrates page

Invertebrates page

b) Write sentences to justify your choice.

c) In the album’s invertebrate animals section, Virginia must write how they reproduce. Circle the correct answer. ●

They lay eggs.

●

They give birth to their young.

d) Colour in the groups the earthworm and the spider belong to. What are the characteristics of these two groups? Jellyfish

Natural Science 4. Unit 1

Arthropods

Molluscs

Echinoderms

Sponges

Worms

PHOTOCOPIABLE MATERIAL

UNIT

1

REINFORCEMENT

Inverterbrate animales

Name:

Date:

Class:

Patricia and her family have been to an invertebrate animal exhibition. 1

Look at these animals from the exhibition. Do you know their names and groups they belong to?

Name

Group

It has jointed legs It has a soft body and an outer shell It has a colourful exoskeleton It has a body full of pores It has a long, soft segmented body It has poisonous tentacles It is soft with an internal shell

2

When the exhibition was over, Patricia and her sister were given a test. Help them complete the test. Mark the following statements with a T (true) or an F (false).

Insects don’t have antennae. Crustaceans have a cephalothorax and an abdomen. The body of an echinoderms is covered in scales. Earthworms aren’t actually in the worm family. Some molluscs have two shells. Jellyfish have rigid bodies. Spiders are born from eggs. Arthropods are invertebrates with external skeletons. Butterflies aren’t insects. Natural Science 4. Unit 1

PHOTOCOPIABLE MATERIAL

UNIT

1

REINFORCEMENT Name:

Arthropods Date:

Class:

Ruben loves animals. His parents have given him a magnifying glass so that he can take a closer look at the invertebrates that live in his garden.

With a magnifying glass I can see even the smallest animals in detail.

1

Ruben says these animals are both arthropods. Do you agree? Why or why not?

2

Do the ant and the spider belong to the same group of arthropods? Explain your answer.

3

Ruben has looked at more animals with his magnifying glass. Circle the arthropods.

Natural Science 4. Unit 1

PHOTOCOPIABLE MATERIAL

UNIT

1 1

2

REVIEW Name:

Date:

Class:

Choose the correct description in each phrase. What group does this animal belong to? ●

It’s got an internal skeleton/ It hasn’t got a backbone.

●

It is oviparous/viviparous.

●

It has 6 legs/8 legs/10 legs.

●

It’s got wings/ It hasn’t got wings.

●

Its body is hard/soft.

The more legs, the more goals. So, who will win the football match between spiders and insects? a) The insects will win because insects have more legs than spiders. b) It will be a draw because both insects and spiders have eight legs. c) The spiders will win because each spider has eight legs and each insect has six.

3

Clara has asked her mum not to put any animals with jointed legs in the paella that she is going to make. a) What can Clara’s mom buy from the fish market? Octopus

Squid

b) What group do these animals belong to?

Natural Science 4. Unit 1

Prawns

Mussels

Shrimp

PHOTOCOPIABLE MATERIAL

UNIT

1

REVIEW Name:

Date:

Class:

4

Clara’s mum has finished cooking. What invertebrates can you find in the paella? Write the name of the groups they belong to and a defining characteristic of each group.

5

Complete the chart with a Yes or No. What group do these three arthropods belong to?

Head Thorax Cephalothorax Abdomen Antennae Six legs Eight legs Ten legs Wings Group

Natural Science 4. Unit 1

PHOTOCOPIABLE MATERIAL

UNIT

2 1

REVIEW

Vertebrates

Name:

Date:

Colour the characteristics that most vertebrates share.

They lay eggs.

They have a shell.

They have wings. 2

Class:

They have limbs.

They have a backbone. They have a head.

They have a tail. They have feathers.

Manuel is thinking about an animal? Which one?

It’s a mammal. It lives on land. It isn’t omnivore. It isn’t herbivore.

It’s a 3

Match the columns. Feathers Scales Beak Hair Moist skin

Natural Science 3. Unit 2

Reptiles Mammals Fish Amphibians Birds PHOTOCOPIABLE MATERIAL

REVIEW

UNIT

2 4

Vertebrates

Name:

Date:

Class:

Complete the chart to find out the differences between the animals in the images. Write ‘Yes’ or ‘No’.

Characteristic

Mammals

Birds

Reptiles

Fish

Amphibians

No

No

No

Yes

No

Back bone Scales Fins Viviparous Oviparous Lungs Gills Feathers Fur Moist skin Breasts Tail Beak

Add to the chart a couple of animal characteristics for each group.

Natural Science 3. Unit 2

PHOTOCOPIABLE MATERIAL

REINFORCEMENT

UNIT

2 1

Name:

Mammals Date:

Class:

Ana has two pets: a dog called Ron and a cat called Parche. a) What similarities do Ron and Parche share? Make a list.

b) What are their differences?

c) Parche is the only cat in the neighbourhood. All of the cats are similar, but they aren’t exactly the same. Make a list of the differences among these cats. Can you group them?

d) Parche and Ron are vertebrates. Why are they called vertebrates?

●

Which group of vertebrates do they belong to?

●

What group of vertebrates does Ana belong to?

Natural Science 3. Unit 2

PHOTOCOPIABLE MATERIAL

REINFORCEMENT

UNIT

2

Birds

Name:

Date:

Class:

All birds have a beak, but their beaks have very different functions in feeding. There are beaks for tearing, for breaking seeds, for catching insects in flight and for extracting pollen from flowers and plants.

1

Match the type of beak with the type of food it is most used for. Complete the phrases. Choose the word from the box which is most appropriate.

Parrot

Hummingbird

Mouse

Seeds

Herbivore Carnivore Omnivore

2

Robin

Falcon

Arthropods and worms

Pollen from flowers

a) The parrot is a b) The hummingbird is a c) The robin is an d) The falcon is a

Label the body parts on the bird. wings beak legs tail

Natural Science 3. Unit 2

PHOTOCOPIABLE MATERIAL

UNIT

2 1

REINFORCEMENT

Reptiles and fish

Name:

Date:

Class:

Choose the odd the one out in each list of animals. Find the intruder and write the number which justifies your choice. The intruder is ... Because a) Lizard - snake - crocodile - hake b) Viper - water snake - lizard - anaconda c) Sea bream - turtle - anchovy - codfish 1. Because it isn’t a fish. 2. Because it’s not a reptile. 3. Because it has limbs.

2

Look at the images and answer the questions.

Is it viviparous?

Is it viviparous?

Is it oviparous?

Is it oviparous?

Is its skin covered in scales?

Is its skin covered in scales?

Does it breathe through lungs?

Does it breathe through lungs?

Does it breathe through gills?

Does it breathe through gills?

Is it an aquatic animal?

Is it an aquatic animal?

Is it a land animal?

Is it a land animal?

Is it a fish?

Is it a fish?

Is it a reptile?

Is it a reptile?

Is it a crocodile?

Is it a crocodile?

Natural Science 3. Unit 2

PHOTOCOPIABLE MATERIAL

UNIT

2 1

EXTENSION Name:

Metamorphosis Date:

Class:

Look at the different stages of change that a frog goes through and put them in the correct order.

Draw below the phases of the life cycle of a frog, colour and label it.

Natural Science 3. Unit 2

PHOTOCOPIABLE MATERIAL

UNIT

3 1

REVIEW Name:

Date:

Class:

Look at this plant and answer the following questions. a) Is it a woody or a herbaceous plant? Why?

b) How many petals do the flowers in this plant have? What is the name of the collection of leaves around the centre of the flower?

2

Which process of plant reproduction does the following image represent? Explain the process.

3

Say whether these statements are true (T) of false (F). Re-write the false ones so they are true. The vessel is the part of the plant that grows above the soil and supports the leaves. The roots hold the plant down on the ground and take in the minerals and water the plant needs to make its own food. Plants make their food on the leaves. To do this, they need substances from the air, a specific gas and sunlight. Plants are living things, so they carry out vital functions like nutrition, interaction and reproduction.

Natural Science 4. Unit 3

PHOTOCOPIABLE MATERIAL

REVIEW

UNIT

3 4

Name:

Date:

Classify the following plants. Say which aspect you have chosen in order to do it. a

5

b

c

Write these words in the corresponding place. Elaborated sap

6

Class:

Carbon dioxide

Sunlight

Oxygen

Raw sap

Colour in the parts of the flower. Pistil Stamen

Natural Science 4. Unit 3

Stem Vessels

Corolla Photosynthesis

Calyx Roots

Leaves

PHOTOCOPIABLE MATERIAL

UNIT

3 1

REINFORCEMENT Name:

Nutrition in plants Date:

Class:

Jaime shows his friend Anna the plant he has given his grandmother and asks her for advice on how to make the plant grow strong and healthy. Read Anna’s reply and answer the questions. I don’t know. I fill up Nuca’s food bowl every day, I give him fresh water and I take him for a walk.

a) Do you think this advice could be useful to Jaime so he can take care of his plant? Why?

b) Jaime got a little confused trying to explain to Anna that his plant makes its own food and that it doesn’t need food like Nuca does. Help him by ordering steps 1 to 4. Raw sap travels through the vessels to the leaves. It absorbs water and minerals from the soil. Elaborate sap travels though the vessels to the rest of the plant. Photosynthesis takes place in the leaves. c) Where would you place the plant if you were Jaime? Explain your answer.

Natural Science 4. Unit 3

PHOTOCOPIABLE MATERIAL

UNIT

3 1

REINFORCEMENT Name:

Reproduction in plants Date:

Class:

Clara and Diego are curious about a bee that travels from flower to flower. She tries to explain to him that the bee is carrying out a very important task.

The bee carries pollen from one plant to another. This helps them reproduce.

Really?

a) Which reproduction process is Clara describing?

b) What does a seed tranform into when it reacher a flower’s ovary and it connects to the ovule?

c) When the corolla and the calyx wither and fall, which part of the flower continues to grow and bear fruit?

d) What is the germination process?

e) Label the parts of the flower. Corolla Pistil Calyx Stamen Natural Science 4. Unit 3

PHOTOCOPIABLE MATERIAL

UNIT

3

EXTENSION Name:

Plants relate to each other Date:

Class:

Even though plants have no senses organs, they are aware of what happens in their surroundings and react to changes. For example:

Roots travel downwards looking for water.

Some plants move their stem looking for the sunlight.

Some plants, like mimosas, close their leaves when they are touched.

1

Towards which areas do you think roots grow? Towards the areas in which there is a lot of water or the ones in which there is very little? Explain.

2

Why do you think the stem of the plant grows looking for sunlight?

3

Mimosas and other plants close their leaves to protect themselves when something touches them. Why do you think it is important to protect the leaves?

Natural Science 4. Unit 3

PHOTOCOPIABLE MATERIAL

UNIT

3

EXTENSION Name:

Plants adapt Date:

Class:

Plants can move but they can’t travel from one place to another. That’s why they have a series of defence mechanisms against attack from other living things. Besides, they use different strategies to get what they need from the environment or from other living things. Here are some examples:

Some plants, like rose bushes, hav e thorns on their leaves or on their stems. This prevents animals from eating them. Others have poison in them.

ir Carnivorous plants supplement the trap nourishment by eating insects. To sticky them, the plants secrete a kind of ects ins nectar that traps them once the land on the plants.

1

What protection methods do some plants use so they will not be eaten by other living things?

2

Why do you think carnivorous plants need to supplement their diet with insects? Tick the correct box. Because they live in areas where it rains a lot. Because they live in areas where the soil has little water and minerals. Because they live in very cold areas where there is barely any sunlight.

Natural Science 4. Unit 3

PHOTOCOPIABLE MATERIAL

REVIEW

UNIT

4 1

2

Name:

Date:

Circle the correct answer. ●

The ovaries produce ova /sperm.

●

The vagina/vulva is the external part of the female reproductive system.

●

The penis is an external/internal organ in the male reproductive system.

●

The Fallopian tubes are two passages that connect the ovaries with the uterus/penis.

Colour in the organs that are part of the respiratory system. Fallopian tubes

Pharynx Lungs

3

Class:

Bronchi

Diaphragm Penis

Ureters

Nasal cavities

Heart

Belly button

Fill in the gaps in the following text in which a vampire tells us what his favourite food is.

It’s a liquid which carries and

throughout the body. It also carries that our bodies need to remove.

4

What are the blood vessels that carry blood from all parts of the body to the heart called?

Natural Science 4. Unit 4

PHOTOCOPIABLE MATERIAL

UNIT

4 5

REVIEW Name:

Date:

Class:

Order the four sentences below in order to explain what is happening to Robert in the picture. What is this lung movement called?

The air arrives at the larynx and crosses the trachea. The air travels through the alveoli. The air goes in through his nostrils and travels through the pharynx. The air gets to the bronchi and then travels on to the bronchioles.

6

Indicate whether the following statements are true (T) or false (F). The baby is protected in the amniotic sac during pregnancy. The foetus gets oxygen and food through the skin. The belly button is a wrinkle that forms on the baby’s skin during the pregnancy. Pregnancy lasts about nine months for all living things. Human beings are babies from the time they are born until they are 18 months old. The baby develops and grows inside the mother during the delivery.

Natural Science 4. Unit 4

PHOTOCOPIABLE MATERIAL

UNIT

4 1

REVIEW Name:

The heart, a tireless engine Date:

Class:

Joey and Matt are playing in the park. Look at the picture and answer the questions.

a) Who do you think is breathing faster, the boy playing with the ball or the one building sandcastles? Why?

b) Whose heart beats faster? Explain.

c) Look at the following picture which represents a phase in the heartbeat. Cross out the incorrect answers.

The muscles in the heart relax/contract and the heart fills up with/empties the blood, which leaves through the veins/arteries.

Natural Science 4. Unit 4

PHOTOCOPIABLE MATERIAL

UNIT

4 1

REINFORCEMENT

The respiratory system

Name:

Date:

Class:

Claudia has been given her first toy as a gift. Look at the picture and answer the questions.

a) Which system is Claudia using with the toy? What parts has it got?

b) Colour in the muscle that intervenes in the movements of respiration. Diaphragm

Lungs

Trachea

Heart

Nostrils

c) Does the air with which Claudia is blowing the ball have more oxygen than the air she inhaled? Why or why not?

d) What respiration process makes the ball travel upwards? Explain it.

Natural Science 4. Unit 4

PHOTOCOPIABLE MATERIAL

UNIT

4 1

REINFORCEMENT Name:

Healthy habits Date:

Class:

Look at the following picture and circle any unhealthy habits you can see.

a) Choose two of the actions you’ve circled and explain why you don’t think they are healthy.

b) Which are the most important healthy habits we should always bear in mind?

c) Esther gets up at seven o’clock every day to go to school, but last night she watched a film on TV and she went to bed at midnight. Do you think that was a good idea? Explain.

Natural Science 4. Unit 4

PHOTOCOPIABLE MATERIAL

UNIT

4

EXTENSION

Pregnancy

Name:

Date:

Class:

Maria is pregnant and the doctor, using a test called a sonography, is checking the baby is well. He is also measuring it.

APRIL Development of the phoetus’ size 60

SIZE (cm)

5

Your baby is 20 centimetres long.

40 20 0 1

2

3

4

5

6

7

8

9

MONTHS

1

Read the data in the picture. How many months along is Maria’s baby? How do you know?

2

What month will it be born? Explain.

3

What will happen in Maria’s body during the delivery?

Natural Science 4. Unit 4

PHOTOCOPIABLE MATERIAL

REVIEW

UNIT

5 1

Name:

Date:

Class:

Place each word in the correct column according to the sense it is related to. Iris – Rough – Cochlea – Smell – Pituitary – Acid – Soft – Sounds – Retina – Nostrils Eardrum – Skin – Taste buds – Nose – Sweet – Tongue – Pupil – Ear – Eyebrow – Hot Sight

2

Hearing

Touch

Taste

Smell

Complete this diagram with the names of the different parts sounds travel through to get from the ear to the auditory nerve.

Auditory nerve

3

4

Write some advice as to how to take care of the different parts involved in each of the senses: ●

Hearing

●

Sight:

●

Touch:

●

Smell:

●

Taste:

Colour in the movements which are voluntary. Getting out of bed

Breathing

Catching a ball Natural Science 4. Unit 5

Waving your hand

Running

Yawning

Blinking PHOTOCOPIABLE MATERIAL

UNIT

5 5

REVIEW Name:

Date:

Class:

Put the steps below in order and number them accordingly, then write down everything that is happening in the picture.

The brain receives information. The arm muscles receive the command, and work together to hit the ball. The tennis player’s eyes capture the image of the ball travelling towards her. The information travels from the optic nerve to the brain. The brain sends a command to the muscles in the arm to move and hit the ball.

6

Place the arm bones and muscles in the correct box. Humerus Biceps Triceps Radius Ulna

Natural Science 4. Unit 5

PHOTOCOPIABLE MATERIAL

UNIT

5 1

REINFORCEMENT Name:

The senses Date:

Class:

During the school festival, there is a contest in which the children have to guess the flavour of some cakes. Look at the picture and answer the questions.

a) Which sense can they not use?

b) What flavour were Harry and Eve’s cakes? What other flavours can we taste? Which part of the tongue allows us to identify flavours?

c) Santiago has a cold, so when he tasted the cake he couldn’t figure out what flavour it was. Why do you think this happened? Elaborate on your answer.

Natural Science 4. Unit 5

PHOTOCOPIABLE MATERIAL

UNIT

5 1

REINFORCEMENT Name:

The nervous system Date:

Class:

Albert’s uncle has come to visit. Look at the pictures and answer the questions.

a) Complete the sentences to explain the process that is taking place in Alberto’s nervous system in each of the pictures. 1. The sound of the door closing reaches Albert through his sense of 2. The information from the sound of the door closing reaches the the ear via the ……… 3. The sends him the 4. The uncle.

. through

recognises this is the sound his uncle made when closing the door and to run towards him and hug him. carries out the command and Albert runs towards his

b) Are the movements Albert makes when running towards his uncle voluntary or involuntary? Why?

Natural Science 4. Unit 5

PHOTOCOPIABLE MATERIAL

UNIT

5 1

REINFORCEMENT

The musculoskeletal system

Nombre:

Fecha:

Curso:

There are three patients with broken bones at the traumatologist’s office. Look at the picture and answer the questions.

A

B

C

a) Carlos has broken a phalanx playing basketball, Irene has broken her collarbone while skiing and Laura has broken her radius while riding her bike. Which X-ray corresponds to each one of them? Carlos Irene Laura b) Miguel didn’t warm up his muscles properly before going running and his right thigh hurts a lot. He is helping the traumatologist give him a prognosis. Which of the following muscles could he have hurt? Colour the correct answer. Quadriceps

Calf muscle

Abdominals

Trapezium

Deltoids

c) Write down two safety measures to protect the musculoskeletal system that will save us from having to go to the traumatologist.

Natural Science 4. Unit 5

PHOTOCOPIABLE MATERIAL

UNIT

5

REINFORCEMENT

The joints

Name:

Date:

Class:

Put your hand on your knee and bend and stretch your leg. Can you feel your bones moving?

The points where our bones connect to each other like the knee, are called joints. Bones at those points are joined through some bands of fibrous tissue called ligaments, and muscles are joined to bones through other bands called tendons. In some joints, bones can move in all directions like, for example, the shoulder. However, there are other bones that can only move up and down or sideways, as in the knee. These types of joints are called hinge joints. 1

2

Match the words on the left to the words on the right. Joint

Joins muscles and bones

Ligament

Point at which bones join

Tendon

Joins two bones

Put your hand on the following joints and feel the movement. Which of them are hinge joints?

Elbow

Natural Science 4. Unit 5

Knee

Shoulder

Ankle

Fingers

Neck

PHOTOCOPIABLE MATERIAL

UNIT

6

REVIEW Name:

Date:

1

What form of energy do these pictures depict?

2

Colour in the non-renewable sources of energy. Coal

3

Sun

Wind

Petroleum

Class:

Gas

Moving water

Heat is the transfer of energy from one body to another with… more temperature. less temperature. the same temperature.

4

What heat phenomenon does the following picture represent?

5

The component that provides energy to elecrical circuits is called a… receptor. generator. switch.

Natural Science 4. Unit 6

PHOTOCOPIABLE MATERIAL

UNIT

6 6

REVIEW Name:

Date:

Class:

A bath screen is…

Translucent. Opaque. A mirror. 7

Mark these statements as T for true or F for false. Sound moves from one place to another only through the air. Sound moves in a straight line and in all directions. The qualities of sound are intensity, pitch and volume.

8

Which of the following devices transforms electrical energy into kinetic energy?

Natural Science 4. Unit 6

PHOTOCOPIABLE MATERIAL

UNIT

6

REVIEW Name:

The properties of light Date:

Class:

Antonio and his friends have gone to the amusement park and have entered the maze of mirrors. Look at the picture and answer the questions.

1

What type of bodies are mirrors according to how they respond to light? Why?

2

What property of light takes place when we see our image in a mirror? Explain it.

3

How can we classify mirrors according to the image they reflect? Classify the mirrors in the picture.

Natural Science 4. Unit 6

PHOTOCOPIABLE MATERIAL

UNIT

6

REVIEW Name:

The effects of electricity Date:

Class:

Martha and her parents have gone to a shop looking for some home appliances.

1

What are electrical devices?

2

Ovens and heaters transform electrical energy into... heat energy. sound energy. kinetic energy.

3

Marta’s mum is looking for a device that transforms electrical energy into kinetic energy. What devices in the shop can carry out this transformation?

4

Name at least two other electrical devices, not in the picture, that transform electical energy in kinetic energy.

Natural Science 4. Unit 6

PHOTOCOPIABLE MATERIAL

UNIT

6

EXTENSION

Electrical circuits

Name:

Date:

Class:

In order to draw electric circuits, electricians use symbols that represent the components the circuits are made up of. Some of the most common components and symbols are these: Battery

Light bulb

Open switch

Closed switch

Electrical conductor Socket

For instance, this is what an electrician would draw in order to portray an electric circuit made up of a battery, an electrical conductor, a light bulb and a switch:

+

1

Imagine you are an electrician. Draw the following circuit.

Natural Science 4. Unit 6

PHOTOCOPIABLE MATERIAL

UNIT

6

EXTENSION Name:

The drop hammer Date:

Class:

Do you know how copper cauldrons used to be made? They were made using a machine called a drop hammer. To do this, the upper flow of a river was channelled to make a large wheel turn that would move a large hammer, which would beat the molten copper. The artisans would work it until it was shaped into a cauldron.

1

What were drop hammers used for?

2

What form of energy was used to make the drop hammer work?

3

Was the source of energy used by drop hammers renewable or non-renewable?

4

What advantages do renewable sources of energy have over non-renewable sources of energy?

5

What heat effect does copper go through when it melts?

6

What’s the name of the process through which copper goes from a solid state to a liquid state?

Natural Science 4. Unit 6

PHOTOCOPIABLE MATERIAL

UNIT

7

REINFORCEMENT Name:

Date:

1

What does this instrument measure: the cats’ mass or volume?

2

Colour in the general properties of matter. Mass

Hardness

Density

Flexibility

Resistance

Class:

Impermeability

Volume

Transparency

Conductivity

3

Write down which two specific properties of matter each object represents.

4

What is a force? How are forces produced?

Natural Science 4. Unit 7

PHOTOCOPIABLE MATERIAL

UNIT

7

REINFORCEMENT Name:

Date:

Class:

5

Look at the scale. Which has more mass: the grapes or the apples? Why?

6

What effect have forces produced in this picture?

7

How are bodies classified according to the deformation that can occur?

Natural Science 4. Unit 7

PHOTOCOPIABLE MATERIAL

UNIT

7

REVIEW Name:

Properties Of Matter Date:

Class:

Susan is making a potato omelette for the first time. Read the recipe and answer the questions.

Ingredients

Directions

1

Which of these objects would you use to weigh the potatoes?

2

What property should the material the frying pan is made of have in order to be able to fry the potatoes and onion?

3

Would you use a metal or a wooden spoon to stir the potatoes in the frying pan? Why?

4

Is the dish with which we flip the omelette a rigid, fragile or elastic body? Explain.

Natural Science 4. Unit 7

PHOTOCOPIABLE MATERIAL

UNIT

7

REINFORCEMENT

Materials

Name:

Date:

Class:

A new building is going to be built in the neighbourhood. Here is a list of materials the builders will need:

1

What properties does asphalt have? What do you think the builders are going to use it for?

2

Which of the things on the list will be used to build the building? Explain.

3

What materials would you used to make the builder’s uniforms? Why?

4

The gloves the builders use to handle electrical machines should be.

Transparent Natural Science 4. Unit 7

Malleable

Insulating

Fragile

PHOTOCOPIABLE MATERIAL

UNIT

7

EXTENSION

Gravity

Name:

Date:

Class:

Isaac Newton is one of the greatest scientists of all time. One day, while he was sitting under a tree in his country house, an apple fell and hit him on the head. Most of us wouldn’t think twice about it, but Newton asked himself: what type of force causes objects to fall? Does the Earth attract objects? The force that attracts objects towards the Earth is called gravity.

1

What is the force that made the apple fall on Newton’s head called? Force of gravity

Apple tree force

Centrifugal force

2

What type of force does the text describe: a contact or a non-contact force? Why?

3

When we stumble into something and we fall on the ground, is it because of gravity? Elaborate your answer.

4

What effects do forces have on bodies?

Natural Science 4. Unit 7

PHOTOCOPIABLE MATERIAL

UNIT

7

EXTENSION Name:

Submarines Date:

Class:

Have you ever been on a boat or a ship? They don’t sink, right? Then, how is it that submarines can travel under water? Boats and ships float because, even though they are built of materials that are heavier and denser than water, they have many areas filled with air. This makes the density of the ship less than that of water. A submarine floats in its normal state, but it carries some tanks in the hull that can fill with sea water when it needs to submerge. When those tanks are full of water, the submarine moves in the water since its density is greater than that of sea water.

1

According to the text why do boats and ships not sink?

2

What does a submarine have to do so it can move when it is submerged in water?

3

What other properties besides density does matter have? Write down at least two of them.

4

Could you simulate how a submarine works using an empty plastic bottle, a cap and a water container? What does the bottle need to simulate the submarine is floating?

Natural Science 4. Unit 7

PHOTOCOPIABLE MATERIAL

UNIT

8

REVIEW Name:

Date:

Class:

1

Identify the elements in the structure. Explain why a bridge is a structure.

2

Why is it said that the skeleton is the structure of the human body?

3

Look at the following picture. What machine does it represent?

Natural Science 4. Unit 8

PHOTOCOPIABLE MATERIAL

UNIT

8

REVIEW Name:

Date:

Class:

4

Circle the machines that have signified an advancement in the field of transport.

5

Place the following elements of the lever in the corresponding box. What type of lever is it? Force

Fulcrum

Load

6

Explain what a pulley is in your own words.

Natural Science 4. Unit 8

PHOTOCOPIABLE MATERIAL

REINFORCEMENT

UNIT

8

Name:

Structures Date:

Class:

Almudena has gone to the amusement park with friends. They are riding the roller coaster.

A

B

C

1

The people and roller coaster cars are heavy. How can the roller coaster stay up?

2

Identify the objects that form the structure in the picture above. A. B. C.

3

4

Identify the elements of the structure represented on the roller coaster.

A

They are the vertical structures that support the rails.

B

They are the rails on which the cars run.

C

The weight of the cars with people inside.

Look at the roller coaster. Rails have been added to the square structures that form the girders to transform them into triangular pieces. Why has this been done?

Natural Science 4. Unit 8

PHOTOCOPIABLE MATERIAL

UNIT

8

REINFORCEMENT Name:

Levers Date:

Class:

Andrew’s father is a barber. Look at his barbershop and answer the questions.

1

Look at the picture and circle the levers you can identify.

2

Look at the scissors Andrew’s father is using. What type of lever is this? Elaborate your answer.

3

What elements can be found on a lever?

4

Andrew’s father has a juicer so that clients can drink juice while waiting to get their hair cut. What type of lever is the juicer? Name two examples of this type of lever.

Natural Science 4. Unit 8

PHOTOCOPIABLE MATERIAL

UNIT

8

EXTENSION Name:

The Eiffel Tower Date:

Class:

Lucy and Carlos have gone to Paris to learn French. They are amazed by one of the tallest structures in France, the Eiffel Tower. Lucy tells Carlos that building started on the tower on July 1st of 1887. Over three hundred people worked long days on building the gigantic steel structure made up of 18,000 pieces. All these pieces were designed by the engineer, Gustave Eiffel. Despite the difficulties building the tower, it only took two years to complete. The Eiffel Tower has become the symbol of Paris and is the most visited monument in the world.

1

According to the text, when did the building of the Eiffel Tower start?

2

Is the Eiffel Tower a structure? Why?

3

Why does the Eiffel Tower have triangles all over it?

4

Imagine you are an architect. Draw the structure of an imaginary bridge.

Natural Science 4. Unit 8

PHOTOCOPIABLE MATERIAL

UNIT

8

EXTENSION

Inventions

Name:

Date:

Class:

Throughout history, Spain has produced great inventors capable of designing apparatuses that have astonished the world. You can see some of them here.

1

Submarine. In 1888 the engineer from Murcia, Isaac Peral, built the first steel submarine propelled by electricity.

The mop. In 1956, the engineer from La Rioja, Manuel Jalón, created his first mop with a crest of cotton sashes. It has been perfected over the years.

Chupa Chups. Enric Bernat came up with the idea of putting a stick in a sweet. This way children could eat the sweet with less chance of their choking.

Space suit. In 1935, Emilio Herrera of Granada designed the first space suit. Thanks to this design, today’s astronaut suits were developed.

Match each invention to their inventor. Submarine Chupa chups Mop Space suit

2

Emilio Herrera Enric Bernat Manuel Jalón Isaac Peral

There are many Spanish inventors that have made our daily lives easier. Look for information on some of them and say what they invented, when and what the invention consists of.

Natural Science 4. Unit 8

PHOTOCOPIABLE MATERIAL