Evaporation and Transpiration

Q.

What is the term for plants releasing water from their leaves, which then evaporates?

1. Transpiration

2. Condensation

3. Evaporation

4. Precipitation

Q. What is transpiration process in plants?

Q. Transpiration occurs from which part of the tree?

1. 
2. 
3. 
4. 

Q.

Water evaporates into air from oceans, rivers and lakes but not from the soil.

1. True

2. False

Q. The water level in fresh water sources like rivers and lakes _______ during the rainy season and _______ during the summer season.

1. increases, increases
2. decreases, decreases
3. decreases, increases
4. increases, decreases

Q.

Which of the following phenomena is based on the principle that cooling results due to evaporation?

1. formation of water drops on the surface of a cold drink bottle

2. formation of crystals of ice on the inner surface of the lid of an ice cream box in a freezer

3. White foggy appearance on the surface of large ice cubes

4. stretching of tounges by dogs during summer

Q.

Water evaporates from oceans, rivers and lakes but not from the soil.

1. True

2. False

Q.

Wet clothes kept near heater dries up because of

1. Water in clothes evaporate.

2. Water in clothes evaporates and condenses.

3. Clothes doesn't dry up near heater.

4. Water in clothes condense out.

Q.

Drying clothes takes time during the rainy season. Give reason?

Q.

A girl saw a water puddle on the field while going to school. In the evening, while returning home, she observed that the puddle disappeared. This was because

1. The water evaporated.

2. The water seeped into the ground.

3. The water condensed.

4. Both (A) and (B)

Q.

It is observed that a beaker containing ether is placed on the top of a little water on a wooden block. Air is, then blown by a tube through the ether. Discuss what happens to water? Give a reason for your observation.

Q.

The process through which plants release moisture into the atmosphere is called ___ .

Q.

Evaporation of water from water bodies and subsequent condensation give us __________.

Q.

What are the factors affecting evaporation?​

Q.

Wet clothes kept near heater dry up because of -

1. Water in clothes condense out.

2. Water in clothes evaporate.

3. Water in clothes evaporates and condenses.

4. Clothes doesn't dry up near heater.

Q. Transpiration occurs from which part of the tree?

1. 
2. 
3. 
4. 

Q.

Question 5

(i) Evaporation occurs from the …………… of the water.

(ii) At sea-level, pure water boils at ……………

(iii) Condensation of steam takes place at ……………

Q.

How does the water kept in an earthen pot(matka) become cool during summer?

Q. The relation between density of air ($Da$) and water vapour ($Dco$) is:

1. $Da=Dco$
2. $Da>Dco$
3. $Da<Dco$
4. $Da\le Dco$

Q. When plants give off water vapour through their leaves, it is called
(a) evaporation
(b) transpiration
(c) condensation
(d) collection

Q. Continuous circulation of water from the earth to the sky and back to the earth is called _________.

1. Precipitation
2. Circulation
3. Water cycle
4. None of these

Q.

Sometimes most of the rainwater disappears as soon as it falls on the ground. Is this because of evaporation? Explain. [3 MARKS]

Q.

Water kept in sunlight gets heat from the sun and is evaporated. But how does water kept under the shade of a tree also gets evaporated? Explain. [3 Marks]

Q. Transpiration occurs mainly from which part of the tree ?

1. Roots
2. Flowers
3. Fruits
4. Leaves

Q.

16. Which of the following statements is true?

1. Water which looks clean and sparkling is fit to drink.

2. Rainwater is the purest form of water.

3. The process by which plants release water is called surface run-off.

4. The coming down of water in the form of rain, hail, and snow is called perspiration.

Q. Change of temperature can be used to change the state of water. True or false?

Q.

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

1. Global warming

2. The sun

3. Water treatment centres

4. The moon

Q. Water can be converted to water vapour by heating it.

1. False
2. True

Q.

Question 5

(i) Evaporation occurs from the …………… of the water.

(ii) At sea-level, pure water boils at ……………

(iii) Condensation of steam takes place at ……………

Q.

Evaporation is possible only in the presence of sunlight.

1. True

2. False