Which of these is NOT a source of surface water?
Puddle
Well
Pond
River
Observe the figure given below. A boy is blowing air into a beaker filled with water using straw. We see bubbles due to:
water
air
straw
particles
What do you see when you boil water in a kettle?
Smoke rising into the air
Steam rising into the air
Ice on the outside of the kettle
Nothing happens
Which of these is NOT a source of drinking water?
Tap
Sea water
Hand pump
Our Earth is surrounded by a layer of air called:
temperature
rainfall
weather
atmosphere
If a steel plate is held on top of the hot vessel, we see tiny droplets of water on the plate. Which of these on touching the hot plate changes into droplets of water?
Ice
Dew
Steam
Heat
Matter can undergo changes. When water boils:
liquid turns to a solid
solid turns to a liquid
liquid turns to a gas
gas turns to a solid
We cannot see or feel water in the air because it is in the form of __________
solid
liquid
gas
steam
Fast and strong winds are called:
breeze
storm
wind
earthquakes
Wet clothes dry under the Sun. This is an example for:
condensation
melting
boiling
evaporation
