VERY SHORT Q & A:
Q1: We do not use water for making products in industries. True/ False
Q2: We get water from:
d. All of these
Ans: All of these.
Q3: Water present in ocean and sea is ___________________ for drinking.
Q4: What are salty water?
Ans: Water in which many salts are dissolved.
Q5: Name the source of saline water.
Ans: Ocean and sea
Q6: Water spilled on a floor dries up because of ____________________.
Q7: Name the phenomenon responsible for drying of clothes on a cloth line.
Q8: Water vapour carry away salt with it? True/ False
Q9: On _____________ water changes in to water vapour.
Q10: On_______________ water changes into ice.
Q11: Can we convert water into water vapour without heating it?
Q12: Name the source of heat that heats water bodies and form water vapour.
Q13: Why we are not able to notice water vapour from bucket full of water kept in sunlight?
Ans: Because evaporation taking place here is a slow process.
Q14: Plants need water to:
b. Cook food
c. None of these
d. Both a and b.
Ans: Both a and b.
Q15: Name the two process by which water vapour enters air.
Ans: Evaporation and transpiration
Q16: ______________ are found on leaves and grasses in winter morning.
Q17: ___________________ are tiny droplets of water that remain floating in air.
Q18: Define rain
Ans: Rain are falling water drops
Q19: Define water cycle
Ans: The circulation of water between ocean and land is known as water cycle.
Q20: Name the process that maintains the supply of water on land.
Ans: Water cycle
Q21: How monsoon is important for crops?
Ans: The sowing of many crops depends on the arrival of monsoon.
Q22: Heavy rains may lead to rise in level of water in rivers, lakes and ponds. True/False
Q23: Does rain effects the animals living in soil?
Q24: What is the role of air in water cycle?
Ans: Air helps the water vapour to rise up to form cloud.
Q25: Circulation of water between ocean and land is a continuous process or discontinuous process?
Ans: Continuous process
Q26: What would happen if it does not rain in a region for a year?
a. Soil will become dry
b. Water bodies will become dry
c. There will be condition called draught
d. All of the above.
Ans: All of the above
Q27: Excessive rain may cause____________________.
Q28: Black board dries up after wiping it, because of the process of _____________.
Q29: The evaporation of water takes place only in sunlight?