Page 102 - TTTP_2_SB_SE

Modules
CLIL: Science 3 4

The greenhouse e ect and global warming

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A. Look at the highlighted words in the text and find their
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definitions in a dictionary.
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B. What do you know about the greenhouse effect and global
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warming? Listen, read and check your answers. 
How do greenhouses work?
• Greenhouses are glass buildings for growing plants.
They protect plants and keep them warm even in winter.
• Sunlight goes through the glass and makes the air in the
greenhouse warm.
• However, heat cannot escape, so the greenhouse gets
warmer and warmer.
The earth is like a greenhouse.
The problem now is that the earth is
getting warmer and warmer (global
• Sunlight goes through the warming) because there is too much
earth’s atmosphere and carbon dioxide in the atmosphere. This
makes it warm.
happens because people burn a lot of coal
• Gases in the atmosphere, © MM Publications
and oil when they use electricity, cars,
such as carbon dioxide (CO ), plane s , tr ains , et c . Also , people cut do wn
planes, trains, etc. Also, people cut down
2
don’t let some of the heat or burn trees, so there are fewer
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, so ther
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escape. This is good because trees. We need plants and trees
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it keeps the earth warm. because they take in carbon
bec
y tak
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ause the
dio xide and gi v e o o xy gen.
dioxide and give o oxygen.
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Global warming can be
an be
ming c
ar
lobal w
dangerous for people, animals
and plants too.
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C. Read the text again and answer the questions. . .
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4. Where does the carbon dioxide in the
1. How do greenhouses stay warm? 4 .
2. How is the earth like a greenhouse? atmosphere come from?
3. Why is the earth getting warmer and warmer? 5. How do trees help with global warming?
Project Do an experiment! !
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You will need:
water
two glass jars
sunlight
(with lids) a teaspoon sunlight
a teaspoon
1. Put a teaspoon of water in each jar.
2. Put the lid on one jar only.
Take the jars outside in the sun for a few hours.
100 3. Take the jars outside in the sun for a few hours.
To the Top_Plus2_SB_Clil 1-3.indd 100 26/11/2018 3:48:46 µµ