Which of the following are the substances that are present in the soil and required for the growth of crops?
Manures
Pesticides
Fertilisers
Nutrients
Ice is __________ form of water.
solid
liquid
gaseous
none of these
Which sequence shows the correct changes in the state of water melting?
Solid → Liquid
Liquid → Gas
Gas → Solid
Liquid → Solid
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.
When Suresh blew air into a balloon it expanded. This shows that:
air has no mass
air occupies volume and space
air has no weight
air is invisible
When water is transferred from a glass to a bowl as shown in the given figure, its ___________ changes.
colour
mass
weight
shape
Which of the following activity requires air?
When we pour ice cubes into jug of water ice floats on water. Why?
Ice is heavier than water
Ice is solid while water is liquid
Ice has white colour
Ice is lighter than water
Which of the following layers of soil contains more humus?
Top soil
Sub soil
Bed rock
None of these
71% of earth surface is covered with:
land
air
water
coal
