Answer:
NSION TEST
GRADE 8
The people on earth face a major problem called global warming. Global warming occurs when
the average temperature in many places on earth rise. Environment will change as a result of this.
Farming areas may be too hot to raise crops. Many parts of the earth will dry up forming deserts.
Icebergs may melt causing the oceans to rise and flood many coastal areas. Although this may take
several years to happen, it is bound to happen.
We got energy from the sun in the form of heat. The extra heat should bounce from the earth
into space. This does not happen when the earth’s atmosphere is full of polluted gases. The extra heat
is trapped inside causing the average temperature to rise.
The extra heat trapped above the earth is called the greenhouse effect. If ever you had sat inside
a bus on a warm and sunny day with all windows closed, you have experienced the greenhouse effect.
The gasses that pollute the atmosphere and cause the greenhouse effect are greenhouse gases.
The greenhouse gases come from many sources. They come from fuel being burned in
industrial plants. Oil and gasoline used in motor vehicle give off greenhouse gases. Garbage burned in
your backyard has greenhouse gases. Even the wood used in cooking increases the greenhouse gases in
the atmosphere.
Trees reduce the amount of greenhouse gases in the atmosphere. Trees use the carbon dioxide,
one of the greenhouse gases in making their own food. They give off clean air, oxygen. Another way
to reduce the amount of greenhouse gases is to plant more trees.
267 WORDS
NAME: _______________________________________
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Answers & Comments
Answer:
NSION TEST
GRADE 8
The people on earth face a major problem called global warming. Global warming occurs when
the average temperature in many places on earth rise. Environment will change as a result of this.
Farming areas may be too hot to raise crops. Many parts of the earth will dry up forming deserts.
Icebergs may melt causing the oceans to rise and flood many coastal areas. Although this may take
several years to happen, it is bound to happen.
We got energy from the sun in the form of heat. The extra heat should bounce from the earth
into space. This does not happen when the earth’s atmosphere is full of polluted gases. The extra heat
is trapped inside causing the average temperature to rise.
The extra heat trapped above the earth is called the greenhouse effect. If ever you had sat inside
a bus on a warm and sunny day with all windows closed, you have experienced the greenhouse effect.
The gasses that pollute the atmosphere and cause the greenhouse effect are greenhouse gases.
The greenhouse gases come from many sources. They come from fuel being burned in
industrial plants. Oil and gasoline used in motor vehicle give off greenhouse gases. Garbage burned in
your backyard has greenhouse gases. Even the wood used in cooking increases the greenhouse gases in
the atmosphere.
Trees reduce the amount of greenhouse gases in the atmosphere. Trees use the carbon dioxide,
one of the greenhouse gases in making their own food. They give off clean air, oxygen. Another way
to reduce the amount of greenhouse gases is to plant more trees.
267 WORDS
NAME: _______________________________________