Last updated on August 30th, 2023 at 12:58 am
Class 7 Science Water a Precious Resource Question Answers
Class 7 Science Water a Precious Resource | Class 7 Science Extra Question Answer | for the students of cbse / icse / state board exams.
Fill in the blanks
- The ……….. can be used to recharge the groundwater.
- …………. was the traditional way of collecting water.
- The water found below the water table is called …………..
- The main source of groundwater is …………
- ………… is celebrated as the world water day!
- The water which falls from clouds as rain or snow is called ……………
Answers
- Rainwater
- Bawri
- Groundwater
- Rain
- 22 march
- Precipitation
Answer the following questions:
Que:- How much water is recommended by the united nations per person per day?
The amount of water recommended by the united nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of 50 litres per person per day. This amount is about two and a half buckets of water per person per day.
Que:- Where can we find water on earth?
All the water on the earth is contained in the seas and oceans, rivers, lakes, ice caps, as groundwater and in the atmosphere.
Que:- What are the different forms of water?
It can be found in all the three forms, i.e., solid, liquid and gas—at any given time somewhere on the earth. The solid form, snow and ice, is present as ice caps at the poles of the earth, snow-covered mountains and glaciers. Liquid water is present in oceans, lakes, rivers, and even underground. The gaseous form is the water vapour present in the air around us.
Que:- What is infiltration?
The rainwater and water from other sources such as rivers and ponds seeps through the soil and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called infiltration.
Que:- What is drip irrigation?
Drip irrigation is a technique of watering plants by making use of narrow tubes with small holes, which deliver water directly at the base of the plant.
Que:- Why do we have a water shortage?
Some of the causes of water shortage are:
- Increasing population
- Growing irrigation requirements for agriculture
- Rapid growth of industries
- Mismanagement of water
Que:- When potted plants are not watered for a few days, what happens?
If the potted plants are not watered for few days the plant will, wilt and ultimately dry-up.
