Page 108 - PortalToEnglish_2_SB_SE

5 CLIL: Science

The greenhouse e ect and global warming
The greenhouse e ect and global warming

A
A Look at the highlighted words in the text and find
their definitions in a dictionary..
B B B B B What do you know about the greenhouse
effect and global warming? Listen, read and
check your answers.
How do greenhouses work?
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
© MM Publications
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, and oil when they use electricity, cars,
such as carbon dioxide (CO ), planes, trains, etc. Also, people cut down
planes, trains, etc. Also, people cut down
2
don’t let some of the heat or burn trees, so there are fewer
or burn trees, so there are fewer
escape. This is good because trees. We need plants and trees
trees. We need plants and trees
it keeps the earth warm. because they take in carbon
because they take in carbon
oxygen.

dioxide and give off
dioxide and give off oxygen.
Global warming can be
Global warming can be
dangerous for people, animals
and plants, too.
e
C Read the text again and answer the questions.
xt again and ans
xt again and ans
R
ead the t
ead the t
R
e
er the ques
w
w
tions.
tions.
er the ques
1. How do greenhouses stay warm? 4. Where does the carbon dioxide in the
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?
P RO JE CT You will need: water
PROJECT
Do an experiment!
Understanding the greenhouse effect
two glass jars
(with lids) a teaspoon sunlight
a teaspoon
1. Put a teaspoon of water in each jar.
2. Put the lid on one jar only.
3. Take the jars outside in the sun for
a few hours.
106

100-108_PortalToEnglish2_SERBIA_SB_Culture_Cross.indd 106 3/1/2019 3:52:21 µµ