WATER CLASS 4

________________ has many impurities like different salts, dirt and germs present in it.

• Filtered water

• Chlorinated water

• Polluted water

• Decanted water

Rajiv is making lemon water. He adds sugar to chilled water. He keeps stirring for a long time but sugar does not completely dissolve in it. Why?

• Solids do not dissolve quickly in cold water.

• Sugar is insoluble in water.

• He did not stir properly.

• All of these

Which among the following disease is caused due to polluted water?

• Flu

• Cough

• Sweating

• Typhoid

Which among these is soluble in water?

• Stones

• Pulses

• Soap

• Mustard seeds

We should store water ________________________.

• In an unclean container

• In an uncovered container

• Both a and b

• None of these

_________________ is the processes of letting suspended material settle by gravity.

• Sedimentation

• Decantation

• Filtration

• Chlorination

When it rains, water seeps into the ground through the _______ layers of soil.

• Porous

• Soft

• Hard

• Non-porous

Removing insoluble impurities from water by straining is known as _______________.

• Filtration

• Chlorination

• Sedimentation

• Decantation

Tick the correct statement.

• We should water the plants with a hose

• We should take bath under a shower.

• We should fill our glass with water even if we do not want it.

• We should get leaking taps repaired.

What percent of Earth is covered by water ?

• 85%

• 90%

• 70%

• 97%