REVISION 2

Purification of water by sedimentation.

• Impurities settles down

• Impurities dissolve

• Impurities not visible

• Adding chlorine

Decantation

• Filtration

• boiling

• After sedimentation top clear liquid is poured into another container

• chlorination

Purification by passing impure water through a filter paper.

• Chlorination

• Filtration

• Sedimentation

• Decantation

Cross the road only at the ______________.

• foot path

• zebra crossing

• bus stop

• roundabout

Always walk on the _________.

Immediate help or attention given to an injured person is ________.

Solar energy

• the sun

• wind

• water

Hydro energy

• the sun

• wind

• water