常識科

Water has no….

• Colour

• Sound

• Smell

• Taste

• Hair

Water can let something ……

• Float

• Sink

• Rim

Water flows …….

• Upwards

• Downwards

———can float on water

• Something

• Nothing

Surface tension of water can/cannot make some objects，such as paper clips ，stay on the water surface．

• Can

• Cannot

Water pressure increases／decreases as the depth of water increases．

• Increases

• Decreases

The three states of water are ————、————and————.

• Solid

• Ice

• Water

• Liquid

• Gas

Low/high temperature

• Low

• High

How can we save water？

We’re do the sewage come ？

• Factories

• Frams

• Bottles

• Restaurants

• Households