Water: A Precious Resource quiz

About what percentage of the Earth's surface is covered with water?

Most of the water on Earth is in the:

The upper level of groundwater is called the:

Seeping of rainwater into the ground is:

A traditional stepwell is called a:

The irrigation method that delivers water drop by drop to plant roots is:

World Water Day is observed on:

Which is NOT a reason for depletion of groundwater?

Water in solid form is found in:

Water stored between layers of hard rock below the water table is:

Why is fresh water called a precious resource though water covers most of the Earth? (2 marks)

How does deforestation affect the water table? (2 marks)

Name two ways in which water is wasted at home. (2 marks)

Why do plants wilt when not watered? (2 marks)

How do industries cause water shortage? (2 marks)

What happens to the water table if rainfall is low for several years? (2 marks)

Give two ways water is conserved in agriculture. (2 marks)

Why is the distribution of water uneven in India? (2 marks)

What is the source of water for hand pumps and tube wells? (2 marks)

Why should we not pave the entire area around trees and buildings? (2 marks)

A person brushing teeth with the tap running uses 6 litres; with a mug, 0.5 litre. How much water is saved per person per day if brushing twice daily? How much does a family of 5 save in 30 days? (3 marks)

A school with 800 students uses 20 litres of water per student per day. Find the daily and monthly (30 days) water use. If rainwater harvesting supplies 25 percent, how much is that per month? (3 marks)

A tank 2 m long, 1.5 m wide and 1 m deep is used to store rainwater. Find its capacity in litres (1 cubic m = 1000 litres). (3 marks)

In a city, the water table was 10 m below the ground in 2000 and 25 m below in 2020. Find the fall in metres and the average fall per year. (3 marks)

If all the water on Earth were 100 litres, about 97 litres would be seawater, about 2 litres would be ice and the rest fresh liquid water. How much fresh liquid water would there be? What percentage of the total is it? (3 marks)

Read the passage and answer the questions. In a village, women walk several kilometres every day to fetch water during summer. The village wells dry up by April. (i) Why do the wells dry up? (ii) How does this affect the lives of the women and girls? (iii) Suggest two measures the village can take. (5 marks)

Read the passage and answer the questions. A housing society collects rainwater from rooftops and directs it into a pit filled with gravel and sand. (i) What is this method called? (ii) Where does the water finally go? (iii) How does it help the society? (5 marks)

Read the passage and answer the questions. A farmer switched from flooding his fields to drip irrigation and found that he used less water and his crops grew well. (i) How does drip irrigation save water? (ii) Why does flooding waste water? (iii) Name one crop for which drip irrigation is suitable. (5 marks)

Read the passage and answer the questions. A tap in a school washroom had been leaking for months. A student calculated that it wasted hundreds of litres a month. (i) Why are small leaks a big problem? (ii) What should the student do? (iii) Suggest two more ways to save water in school. (5 marks)

Read the passage and answer the questions. In Rajasthan, some old forts and towns have stepwells with steps leading down to water. (i) What are these stepwells called? (ii) Why were they built in Rajasthan? (iii) How do they help recharge groundwater? (5 marks)

Draw a labelled diagram of the water cycle and explain how groundwater is recharged. (6 marks)

Explain the causes of depletion of the water table with a labelled diagram of groundwater and an aquifer. (6 marks)

Describe rooftop rainwater harvesting with a labelled diagram and explain its benefits. (6 marks)

Explain five ways in which each of us can save water at home and school. (6 marks)

Explain the effect of water scarcity on plants, animals and people. Describe how the community in a dry region can manage water through traditional and modern methods. (6 marks)