Question

F Answer the following questions.
1. What is atmosphere?
2. What are the three forms of water?
3. How is air essential for the survival of plants? When do plants give out oxygen?
Explain.
4. Can ice cubes be changed directly into water vapour? Support your answer with a
suitable explanation.
5. Differentiate between evaporation and condensation.
6. How can you say that the water cycle is a continuous process?
7. Draw the water cycle in the way you have understood.​

Answer 1

Answer:

Ans 1 - Atmosphere is a thin blanket of air that surrounds the earth . It protects us from the harmful rays of sun . It consists of several gases in which oxygen and carbon dioxide occupy the major portion . Hope it helps you

Answer 2

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. The three forms of water are solid , liquid, gas.
3. Oxygen, for plants, is essential because it makes the process of respiration more efficient (known as aerobic respiration). Plant cells are respiring constantly. ... But, during times when they can't access light, most plants respire more than they photosynthesize, so they take in more oxygen than they produce.
4. Ice Changing to Water Vapor
5. Below the melting point temperature, at which point water will turn into water, ice can sublime - that is, transition from a frozen state directly into a vapor state. ... On cold, gray days even when it's too cold for snow to melt, it will eventually sublime into the air as water vapor.
6. Condensation is the change from a vapor to a condensed state (solid or liquid). Evaporation is the change of a liquid to a gas.
7. The water cycle is a continuous process because it is driven by solar energy, which constantly causes the process of evaporation
8. The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. ... The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth.