Mr. Verma reuses water which was used to wash vegetables to water his plants. He is practising ___________ of water.
pollution
conservation
evaporation
desalination
Ice is __________ form of water.
solid
liquid
gaseous
none of these
Rocks are formed by the action of:
sun
wind
rain
all the above
Worms and small organisms grow mostly in:
sub soil
top soil
bed rock
all of these
Which of the following is added to loam for the better growth of the plants?
Bedrock
Humus
Sandy soil
Gravel
Condensation is:
changing water into ice by cooling
changing water vapour into water by cooling
changing ice into water by heating
changing water into ice by heating
71% of earth surface is covered with:
land
air
water
coal
Anjali took a small quantity of soil in a container. She covered it with a plate and heated slowly. After ten to fifteen minutes she removed the plate. She observed some droplets of water on the cover. This shows that soils has:
gravel
sand
humus
moisture
Which form of water can we feel, see and crush?
Solid
Liquid
Gaseous
None
As we go higher from the earth:
the amount of air increases
the amount of air decreases
the amount of air does not change