D. Long Answer Questions.
1. Describe the composition of atmosphere on the earth in brief.
2. What is global warming? Write its causes and effects.
3. What is the troposphere? Describe it.
Answers
Answer:
is this help you
Explanation:
(1.) An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body. An atmosphere is more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low.
2.) (A.) Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.
(B.) Global warming stresses ecosystems through temperature rises, water shortages, increased fire threats, drought, weed and pest invasions, intense storm damage and salt invasion, just to name a few. Some of Australia's great natural icons, such as the Great Barrier Reef, are already threatened.
(3.) Closest to the surface of Earth, we have the troposphere. “Tropos” means change. This layer gets its name from the weather that is constantly changing and mixing up the gases in this part of our atmosphere. The troposphere is between 5 and 9 miles (8 and 14 kilometers) thick depending on where you are on Earth.