Fill a filter funnel with sand and place it in a beaker / measuring cylinder. Pour water into the funnel. What are you most likely to see?
Water sinks quickly into gravel.
Water trickles down to the bottom of the beaker.
Water will not trickle down absorbed by the gravel.
Water will not trickle down the gravel.
Which of the following are the substances that are present in the soil and required for the growth of crops?
Manures
Pesticides
Fertilisers
Nutrients
We know that the continuous heating and cooling of rocks broke them down into small pieces. Which of the following is responsible for continuous heating and cooling?
Air and water
Sunlight and rains
Plants and trees
Plants and animals
Select the INCORRECT statement?
Water exists in three forms
All living things need water
Sea water is sweet
Impure water causes diseases
Which form of water can we feel, see and crush?
Solid
Liquid
Gaseous
None
Which sequence shows the correct changes in the state of water melting?
Solid → Liquid
Liquid → Gas
Gas → Solid
Liquid → Solid
Worms and small organisms grow mostly in:
sub soil
top soil
bed rock
all of these
Burning of fire needs:
oxygen
carbon dioxide
nitrogen
water vapour
Loam contains:
very fine grains which stick together.
equal amounts of sand and clay.
large grains with lots of spaces between them.
grains which do not hold either water or air.
