Question 1 :
The process of changing of water into its vapour is called ......................... .
Question 2 :
Paheli has noticed dew on leaves of grass on winter mornings. Did you notice something similar on leaves or metal surfaces like iron grills and gates on a cold morning?
Question 3 :
State True or False: We can use all the water available on the earth's surface.
Question 4 :
State True or False:
Washing a handkerchief requires more than one bucket of water.
Question 5 :
Fill in the blanks.
Water goes into the atmosphere by the process of _______________.
Question 6 :
Water vapour enters the air through the processes of evaporation and transpiration. Is it lost forever?
Question 7 :
No rainfall for a year or more may lead to ....................... in that region.
Question 8 :
Dissolve two spoons of common salt in half a cup of water. Now if you want to get the salt back, What will you do?
Question 9 :
State True or False:
Brushing your teeth requires less than one bucket of water.
Question 10 :
State whether the following statement is due to evaporation or condensation. Fog appearing on a cold winter morning.
Question 11 :
Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. TRUE or FALSE?
Question 12 :
Suppose for some reason your family gets only one bucket of water everyday for a week. Imagine what would happen?
Question 13 :
Water evaporates into air from oceans, rivers and lakes but not from the soil. TRUE or FALSE?
Question 14 :
We know that some of the fibres that we use for making fabric come from plants. Is water not needed to grow these?
Question 15 :
Water vapour is present in air only during the monsoon. TRUE or FALSE?
Question 16 :
Fill in the blank: Most of the rivers cover long distances on land and ultimately fall into a _______.
Question 18 :
State whether the following statement is due to evaporation or condensation. Steam rising from a hot girdle when water is sprinkled on it.
Question 19 :
Fill in the blanks.
The quantity of water required to produce one page of your book is _____.
Question 20 :
The process of changing water vapour into water is called ....................... .
Question 21 :
Steam rising from a hot girdle when water is sprinkled on it. Is it condensation or evaporation ?
Question 23 :
State True or False:
Most of the water that falls on the land as rain and snow, sooner or later goes back to a sea or an ocean.
Question 25 :
Most of the water is in the oceans and it cannot be used directly. Why?
Question 26 :
Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help?
Question 27 :
State True or False: Water vapour is present in air only during the monsoon.
Question 28 :
Steam rising from wet clothes while they are ironed. Is it condensation or evaporation ?
Question 29 :
State True or False: Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler.
Question 31 :
State True or False: This circulation of water between ocean and land is a discontinuous process.
Question 32 :
Most of the water that falls on the land as rain and snow sooner or later goes back to the oceans.
Question 33 :
State True or False: Groundwater is drawn by a hand pump or a tubewell.
Question 34 :
The sowing of many crops depends on the arrival of _______ .
Question 36 :
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A person takes two similar plates. He places one of the plates in sunlight and keeps the other under shade. Now, he pours equal amount of water in each of the plates as shown in the figure. He then observes the two plates after every 15 minutes. Does the water seem to disappear?
Question 37 :
State True or False: Plants need water. Plants use a part of this water to prepare their food and retain some of it in their different parts. Remaining part of this water is released by the plants into air, as water vapour through the process of transpiration.
Question 38 :
How many glasses of water is required to make 1 page.
Question 39 :
State True or False:
Bathing requires more than a bucket of water.
Question 40 :
Fill in the blank: In those areas where the land has little or no vegetation, the rainwater flows away _________.
Question 41 :
State True or False: Water of some rivers flows into lakes.
Question 42 :
State True or False: The evaporation of water takes place only in sunlight.
Question 43 :
State whether the following statement is due to evaporation or condensation. Water drops appear on the outer surface of a glass containing cold water.
Question 44 :
State True or False: The process of water changing into its vapour, is called evaporation.
Question 45 :
State whether the following statement is due to evaporation or condensation. Steam rising from wet clothes while they are ironed.
Question 47 :
Fill in the blanks.
Water, in the atmosphere, on condensation fall in the form of ________.
Question 48 :
Fill in the blank: Heavy rains may lead to ___________ in rivers, lakes and ponds.
Question 50 :
The evaporation of water takes place only in sunlight. TRUE or FALSE?