• Author / Uploaded
• johan guerrero martinez

• Categories
• Contaminación
• La contaminación del aire
• Selva amazónica
• Oxígeno
• Agua

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Politécnico Grancolombiano Language Department

Name: Johan Guerrero Martinez ____________________________

Diagnostic test level 4

I.

Watch and listen the video and decide if the statements are True or False. Use T or F

https://www.youtube.com/watch?v=yF3i1tgKML0

1. Michio Kaku says that physics can solve climate change problems in the short term. ___F__ 2. Michio Kaku thinks that only democratic processes will permit us to start resolving climate change problems. ___T__ 3. Michio Kaku considers that the success of solar energy involves thinking about a better storage system.

__F___

4. Michio Kaku said that super batteries development intends to improve the market of fossil fuels __T___ 5. Michio Kaku claimed that the U.S.A. was building a fusion reactor that runs on seawater. ___F__

II.

Read the following text carefully:

The Amazon forest covers five million square kilometers, an area as big as the whole Europe excluding Russia. It contains one third of the world’s trees. However, the trees are disappearing. By 1974, a quarter of the forest had already been cut down. In the following year, 1975, four per cent of the remaining trees went. If the destruction of the forest continues at the same rate, there will be nothing left in a few years. Scientists say that the disappearance of trees is already causing changes in the climate. In Peru, there is less snow than before on the high peaks of the Andes mountains. In Bolivia there is very little rain.

What will happen if more of the Amazon forest is cut down? According to climatologists, if the Amazon forest disappears, there will be less oxygen and it will be difficult for us to breathe; the temperature will rise, the ice-caps at the North and the South poles will melt. Even the sea level will rise. Therefore, seaside cities will be flooded. Scientists do not agree about the calculations which can be done in different ways with different results. But all the scientists agree that if we destroy the Amazon forest, it will be an environmental suicide. Life on earth will become difficult, and it may become impossible.

Give a title to the text. WHAT WOULD HAPPEN IF WE DESTROY THE AMAZON FOREST?

Answer the following questions according to the text:

a- How big is the Amazon forest? The Amazon forest covers five million squeare kilometers

b- Why is the Amazon forest so important? Because generates a lot of oxigen , regulate the temperature in the world, prevents ices-caps melt. c. What will happen if it ever disappears? there will be less oxygen and it will be difficult for us to breathe; the temperature will rise, the ice-caps at the North and the South poles will melt. Even the sea level will rise. Therefore, seaside cities will be flooded

III.

In your opinion, which one of these environmental problems has been, is, and will be the most problematic for human beings? How? Why? (60 words)

animal extinction ·acid rain ·air pollution ·overpopulation ·water pollution ·deforestation ·ozone depletion global warming Air pollution

In my opinion the biggest problem for human beings is the air pollution because the air pollution generate water pollution, acid rain, animal extinction, respiratory health problems. The air pollution is caused by different problems like factories and industries that generate polluting gases, fires, smoking habits, machinery, motor vehicles and much more.

We can stop this problem if we control different things like, check the vehicles that are working well and do not get contaminated, use alternative energy like solar energy, wind power and different types of alternative energies also we can recycle garbage not to burn a lot of trash.