G.S.C Air and Water grade 5 by Hana

we cannot see or smell air but can feel its presence when it moves true or false

• true

• false

how many layer are there for atmosphere

• 3

• 7

• 5

what is the amount of water vapour present in the air called

• humidity

• pressure

• barometer

air consists of about --------- % of nitrogen

• 21%

• 78%

• 1%

which method is this

• filtration

• boiling

• evaporation

sand is a/an --------- impurity

• soluble

• insoluble

what is atmosphere

• a blanket of air

• layer of atmosphere

we cannot burn anything without oxygen true or false

• true

• false

which method is this

• distillation

• decantation

• sedimentation

--------- is necessary for life

• air

• water