Стр.142-143 Across the curriculum ГДЗ Комарова Ларионова 8 класс

Приведем выдержку из задания из учебника Комарова, Ларионова 8 класс, Русское слово: 7 Science
Across the curriculum
The greenhouse effect
1 Match the diagram with the steps below.
1 Radiation from the Sun travels through the atmosphere.
2 The Earth’s surface and the atmosphere reflect some of the solar radiation.
3 The Earth’s surface absorbs most of the solar radiation and temperature rises.
4 The Earth’s surface releases heat in the form of infrared radiation. Some of the infrared radiation travels out of the atmosphere.
5 Some heat is absorbed by the greenhouse gases and is trapped in the atmosphere and the Earth’s temperature rises.
Greenhouse gases
2 Read the text and answer the questions.
The gases in the Earth’s atmosphere protect the Earth from solar radiation and help keep the temperature on Earth at the same level. Without greenhouse gases the Earth would be much colder and would be covered in ice. However, this delicate balance can change if the amount of greenhouse gases in the atmosphere changes.
There are three important greenhouse gases. Firstly, water vapour (H2O) from evaporation of lakes and oceans. Secondly, carbon dioxide (CO2) from many natural processes like animal respiration, volcanic eruptions and decay or burning of organic matter. Thirdly, methane (CH4) from the production of coal, gas or oil and released by some animals like cows as part of digestion.
1 How do the gases in the Earth’s atmosphere protect the Earth?
2 Name three greenhouse gases.
3 Which greenhouse gas comes from oil production?
Global warming
3 Read the text. Why is the level of carbon dioxide in the atmosphere increasing?
In the 20th century, human activity began to have a serious effect on the balance of the greenhouse gases. More and more carbon dioxide went into the atmosphere because of the burning of fossil fueis for energy and because of the destruction of forests. The resuit of this human activity is that there is more carbon dioxide in the atmosphere, so more heat is trapped and the result is global warming.
4 What do you know about global warming? Which of the following is not an effect of global warming?
1 Glaciers and polar ice caps are disappearing.
2 There is more travel by aeroplane.
3 There is more flooding.
4 Sea levels are rising.
5 There are droughts and water shortages.
6 There are more destructive storms and hurricanes.
Project
You are going to find out about what we can do to stop global warming.
Plan
The Kyoto Protocol (1997)
Renewable energy
Biofuels
Reduction of greenhouse gas emissions
Acid rain
Research
Find information about what we can do to stop global warming. Look in the library or on the Internet.
Prepare
Complete the table with your findings.
Present your material
Show your completed project to your classmates and teacher.
*Цитирирование части задания со ссылкой на учебник производится исключительно в учебных целях для лучшего понимания разбора решения задания.

Ответ

1. The correct order is: 1 – 2 – 3 – 4 – 5.

2.

1. The gases in the Earth’s atmosphere protect the Earth from solar radiation and help keep the temperature on Earth at the same level.
2. The three greenhouse gases are water vapour, carbon dioxide and methane.
3. Methane comes from oil production.

3. The level of carbon dioxide in the atmosphere is increasing because of the burning of fossil fuels for energy and the destruction of forests.

4. The statement that is not an effect of global warming is: 2. There is more travel by aeroplane.