Read the passage carefully and answer the questions that follow: ( 5 marks )
The greenhouse effect is when the temperature rises because the sun’s heat and light is trapped in the earth’s atmosphere. This is like when heat is trapped in a car. On a very hot day, the car gets hotter when it is out in the parking lot. This is because the heat and light from the sun can get into the car, by going through the windows, but it can’t get back out. This is what the greenhouse, effect does to the earth. The heat and light can get through the atmosphere, but it can’t get out. As a result, the temperature rises.
The greenhouse effect makes the earth appropriate for people to live on. Without it, the earth would be freezing or on the other hand it would be burning hot. It would be freezing at night because the sun would be down. During the day, especially during the summer, it would be burning because the sun would be up with no atmosphere to filter it, so people, plants and animals would be exposed to all the light and heat.
Although the greenhouse effect makes the earth able to have people living on it, if there gets to be too many gases, the earth can get unusually warmer, and many plants, animals, and people will die. Plants like corn, wheat, and other vegetables and fruits would not be able to take the heat. This would cause us to have less food to eat, but it would also limit the food that animals have. With less food, like grass, for the animals that we need to survive (like cows) we would even have less food. Gradually, people, plants and animals would all die of hunger.
On the basis of your reading of the passage, answer the following questions briefly:
1.When does greenhouse effect rise?
2.Why is the global temperature rising?
Fill in the blanks :
3.Greenhouse effect is essential for our existence as _______________.
4.Without the greenhouse effect, the earth would be_______________.
5.The word which means ‘to be able to live by doing efforts’ is________.
Answers :
1. When the temperature rises due to the sun’s heat and light trapped in the earths’ atmosphere.
2. As the heat of the sun does not get out of the earth’s atmosphere.
3. it maintains the cold temperature.
4. freezing or burning pot.
5. survive.
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