Science [1 Marks Each] QUE - ANS

Fill up the blank:
The process of changing of water into its vapour is called ____________.

Can we convert water into water vapour without heating it?

A cooled bottle of water kept outside refrigerator, shows puddle of water around it. Explain why?

Which of the following statements are ‘True’?
Water evaporates into air from oceans, rivers and lakes but not from the soil.

Which of the following statements are ‘True’?
The evaporation of water takes place only in sunlight.

What is water conservation?

What tire the different forms of precipitation?

Draw the flowsheet diagram of water cycle.

What is fog? How is it formed?

Fill in the blanks selecting words from the following list:
snow, rain, clouds, vapour, evaporation, transpiration.
Water, as _____ goes into atmosphere by the processes of ______ and _____ and forms ________, which on condensation fall in the form of ______ and _______.

Why evaporation takes place from all open surfaces of water?

From where do we get water?

State for the following whether it is due to evaporation or condensation:
Blackboard dries up after wiping it.

Define rain.

Fill up the blank:
Excessive rains may cause _________________.

What is the role of air in water cycle?

Name the phenomenon responsible for drying of clothes on a cloth line.

What is ground water?

What are the conse quences of drought?

When does a draught occur?

What happens if it does not rain for a longer period of time?

What is water cycle?

Which of the following statements are ‘True’?
Water vapour is present in air only during the monsoon.

Why do some water pipes burst in winters?

Suggest some methods to conserve water.

What is the ultimate source of water?

State for the following whether it is due to evaporation or condensation:
Steam rising from a hot girdle when water is sprinkled on it.

Does rain effects the animals living in soil?

Define water cycle.

Fill up the blank:
The process of changing water vapour into water is called ______________.

Which of the following statements are ‘True’?
The process of water changing into its vapour, is called evaporation.

Why water in oceans and seas are unfit for drinking?

State for the following whether it is due to evaporation or condensation:
Steam rising from wet clothes while they are ironed.

State for the following whether it is due to evaporation or condensation:
Water drops appear on the outer surface of a glass containing cold water.

What would happen if it does not rain in a region for a year or more?

What are the consequences of large and prolonged rain?

To clean their spectacles, people often breathe out on glasses to make them wet, explain why the glasses becomes wet.

Why is water called a universal solvent?

What is surface water?

What is transpiration?

Define transpiration.

Which of the following statements are ‘True’?
Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler.

What would happen if we do not have easy access to water for a long period of time?

Name the process that maintains the supply of water on land.

What are the major losses due to the flood?

Why rain clouds are dark in colour?

What are the various activities for which water is needed?

Name some sources of water.

Why water spilled on a floor dries up after sometime?

Why we are not able to notice water vapour from bucket full of water kept in sunlight?

Name the source of saline water.

Why is water important for us?

Why rivers originating from Himalayas do not dry during summer?

List all the activities for which you need water in a day.

Fill up the blank:
No rainfall for a year or more may lead to _________________ in that region.

Circulation of water between ocean and land is a continuous process or discontinuous process?

How monsoon is important for crops?

Can we use the water in the oceans and seas for drinking and other purposes? Why?

Name the two process by which water vapour enters air.

What do you mean by potable water?

Name the source of heat that heats water bodies and form water vapour.

The evaporation of water takes place only in sunlight?

Look at Fig.
Write down activities shown in this figure in which water is being used.

What are salty water?

In which seasonal most of the rain occurs in our country?

What do you understand by epidemic?

Why is the water table going down in big cities?

State for the following whether it is due to evaporation or condensation:
Fog appearing on a cold winter morning.

How much water does a man use daily? Give a rough idea.

Is evaporation endothermic or exothermic process?