Question

The water in oceans cannot be used because
(a) it is salty
(b) it is harmful
(c) it is toxic
(d) it is acidic
Q2. How much percentage of water does a human body contains?
(a) 60%
(b) 70%
(c) 80%
(d) 90%
Q3. The place where underground water comes out on the surface of earth on its own is called
(a) rainwater
(b) spring
(c) sea level
(d) glacier
Q4. Potable water is
(a) ocean water
(b) groundwater
(c) river water
(d) pond water
Q5. Which is not a part of water cycle?
(a) Cloud formation
(b) Rain
(c) Drinking by animals
(d) Sun
Q6. The amount of water recommended by the UN for drinking, washing, cooking and maintaining proper hygiene is
(a) 50 litres per person per day
(b) 60 litres per person per day
(c) 70 litres per person per day
(d) 80 litres per person per day
Fill in the blanks with suitable word/s.
1. Water cycle helps in regulating the ………………… on the earth.
2. In atmosphere, water is present in huge quantities as ………………….
3. The circulation of water between ocean and land is known as the …………………
Short Answer Questions:
1Q. Describe water cycle with a neat labeled diagram.
2Q. List the various sources of water.

Answer 1

Answer:

Seawater is toxic to humans

Explanation:

Seawater is toxic to humans because your body is unable to get rid of the salt that comes from seawater. ... Tissue in your body also contains freshwater that can be used. But if there is too much salt in your body, your kidneys cannot get enough freshwater to dilute the salt and your body will fail.

Answer 2

Explanation:

1 = it is salty

2= 60%

3 =spring

4= ground water

5= Dinking by animals

6= 50liter per person per day

fill in the blanks

1 = water

2= vapour and cloud in atmosphere

3= the water cycle

Q2 List the various sources of water

1= ground water

2= rain water

3= surface water