Question

1 the function of earth’s atmosphere is a source of gas, insulation and protection. (true or false) true false 2 the atmosphere is composed of 78% oxygen, 21% nitrogen and 1% other gases. (true or false) true false 3 the greenhouse effect is the trapping of the sun’s warmth in earth’s lower atmosphere. (true or false) true false

Explanation:

Question 1

Earth's atmosphere provides gases (like oxygen for respiration, nitrogen for various processes), insulation (regulates temperature, keeps heat in), and protection (from meteoroids, harmful solar radiation). So the statement is true.

The Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and 1% other gases (like argon, carbon dioxide, etc.). The given percentages for oxygen and nitrogen are reversed, so the statement is false.

The greenhouse effect is the process where greenhouse gases in Earth's lower atmosphere (troposphere mainly) trap the sun's warmth (infrared radiation) to keep the planet warm. So the statement is true.

Answer:

True

Question 2