NCERT Exemplar solutions for Science [English] Class 7 chapter 16 - Water : A Precious Resource [Latest edition]

Which of the following does not show water shortage?

Seas and oceans are full of water on earth. However, a very small percentage of water present on earth is available for us. This percentage is roughly

Which of the following are not the liquid forms of water?

(i) Snow

(ii) Lake water

(iii) River water

(iv) Water vapour

(v) Ice

Choose the correct combination from the options below

A man digging the ground near a water body found that the soil was moist. As he kept digging deeper and deeper he reached a level where all the spaces between particles of soil and gaps between rocks were filled with water. The upper limit of this layer is called

Which of the following is a way to use water economically?

On which of the following day is World Water Day observed?

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of

“Every Drop Counts” is a slogan related to

The water cycle does not involve which of the following?

Which of the following inhibits the seepage of rainwater into the ground?

State whether the following statement is True or False. If false, write the correct statement

Water vapour is the gaseous form of water.

State whether the following statement is True or False. If false, write the correct statement

Ice is solid whereas snow is the semi-solid form of water.

State whether the following statement is True or False. If false, write the correct statement

Ocean water cannot be used for domestic purposes.

State whether the following statement is True or False. If false, write the correct statement

The rapid growth of industries is one of the causes of water shortage.

Some definitions are given below which can be corrected by changing one word. Correct them.

1. The aquifer is groundwater stored between layers of hard rock above the water table.
2. The process of evaporation of water in the ground is called infiltration.
3. The evaporation of water from oceans and its arrival back into oceans is called the vapour cycle.

What is the source of water in each of the following?

Wells

What is the source of water in each of the following?

Ground

What is the source of water in each of the following?

Atmosphere

State whether the following statement is True or False. If false, give the correct statement.

The process of seeping water into the ground is called filtration.

State whether the following statement is True or False. If false, give the correct statement.

51% of the earth’s surface is covered with water

State whether the following statement is True or False. If false, give the correct statement.

The year 2003 was observed as the International Year of Freshwater.

State whether the following statement is True or False. If false, give the correct statement.

Snow and ice both are solid forms of water.

The rainwater and ________________ from other sources such as rivers and ponds seeps through the ______________ and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called ______________.

Fill in the blanks and complete the story by selecting words from the box given here.

Rajasthan is a _________ and dry place. The challenge of natural _______ of water was met by a successful experiment. A band of social ________ had transformed a _________ area into a green place. They have revived five dried-up ________ by constructing water ___________ structures.

Place the following statements in a proper order to form a meaningful paragraph.

1. Which in turn decreases the seepage of rainwater into the ground.
2. This decreases the open areas like parks and playgrounds.
3. Increasing population create demand for the construction of houses, shops, offices, roads and pavements.
4. This results in depletion of the water table and creates a scarcity of water

How can you observe the three forms of water in (i) nature and (ii) at home?

Complete the given table

Match Column I with Column II

The jumbled word is given here. Write the correct form of each word.

WASHFERRET

The jumbled word is given here. Write the correct form of each word.

CHARREGE

The jumbled word is given here. Write the correct form of each word.

QUIFERA

The jumbled word is given here. Write the correct form of each word.

WOSN

From where do the following usually get water? In which form is water present in them?

Clouds

From where do the following usually get water? In which form is water present in them?

Plants

From where do the following usually get water? In which form is water present in them?

Mountain tops

From where do the following usually get water? In which form is water present in them?

Aquifer

From where do the following usually get water? In which form is water present in them?

Animals

Complete the following chart by writing appropriate words in the boxes marked (a) to (e).

What is groundwater? What are the sources of water which are fed by groundwater?

Water is very precious for all living beings. What will happen in future if we do not save water now?