Origin of Water

Q.

Fill in the blanks with the most appropriate words. _______ earth moves round ______ sun.

(a) An/the

(b) The/no article

(c) The/the

(d) no article/the

Q.

Mention any four uses of carbon dioxide.

Q. Egyptian civilisation developed along the banks of the river.

1. Yangtze
2. Nile
3. Amazon
4. Missouri

Q.

The water cycle does not involve evaporation and condensation.

1. True
2. False

Q.

All ancient civilizations grew along rivers.

1. True

2. False

Q. Large parts of the earth are covered by

Q.

From where does dust enter the air?

Q.

What turns the water on the Earth into vapour in the water cycle?

1. The moon

2. Global warming

3. The sun

4. Water treatment centres

Q.

Briefly explain the importance of dissolved gases in water.

Q.

Which of the following is a probable hypothesis for the origin of water on the earth?

1. Local origin of water on earth

2. The Earth was a ball of water from the beginning

3. Extra terrestrial origin of water on earth

4. None of the above

Q. When the clouds cannot hold water anymore, the water pours down as rain. This process is called .

1. evaporation
2. sedimentation
3. condensation
4. precipitation

Q. Which of the following constituent of air leads to the formation of fog and mist?

1. Nitrogen gas
2. Oxygen gas
3. Water vapour
4. Carbon dioxide gas

Q.

12. Which of these represents the water cycle correctly?

1. water on land and sea$\to$ evaporation $\to$water vapor $\to$ clouds$\to$ rain

2. water on land and sea $\to$condensation $\to$clouds $\to$rain $\to$groundwater

3. water on land and sea $\to$ evaporation$\to$rain$\to$clouds

Q.

Define water cycle.

Q.

Define water cycle.

Q. Large parts of the earth are covered by

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is potable water? List out four characteristics of potable water?

Q.

11. Give the percentage of water which is usually available to use for us.

Q. percent of Earth's surface is covered with water.

1. Thirty two
2. Seventy one
3. Ninety seven
4. Forty five

Q.

Aarushi is trying to recreate the atmosphere in her laboratory. But, she finds that the labels are missing from the containers. She knows that nitrogen, oxygen and carbon dioxide are stored in separate containers and one bottle contains a mixture of other gases, dust particles and water vapour. The containers are shown below -

Look at the containers and based on the concepts about constituents of air, help Aarushi to put the labels back on the containers.

Q. Which among the following sources of water can not be used for agriculture?

1. River
2. Pond
3. Well
4. Sea

Q. Water that can be used for drinking purpose is called as _____.

1. distilled water
2. saline water
3. potable water
4. demineralised water

Q.

89 In what percentage of carbon dioxide is present in the air?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is potable water? List out four characteristics of potable water?

Q.

Which of the following is/are the use(s) of fresh water?

1. Drinking

2. Bathing

3. Cooking

4. All of the above

Q.

Large parts of the earth are covered by___________

Q. More than 70% of world's freshwater is contained in

1. Polar ice
2. Glaciers and mountains
3. Antartica
4. Greenland

Q.

Enlist the uses of carbon dioxide and oxygen.

Q. Water is

1. A compound.
2. A mixture.
3. An element
4. Both (A) and (C)

Q.

Clean water is water free of germs and chemicals and it must be not cloudy.

1. True

2. False