grade 5 , con 6 , lesson 5

People cannot drink the water of oceans and seas because it is a mixture of water and.......

• salt only.

• minerals only.

• living organisms only.

• salt, minerals and living organisms.

Desalination process means that we remove ............from water to drink it.

• sugar

• salt

• oxygen gas

• hydrogen gas

We can use ...........processes to separate fresh drinkable water from the water of seas and oceans.

• filtration and rusting

• evaporation and coloring

• filtration and coloring

• filtration and evaporation

To separate salt and minerals from seawater, we can use............ process.

• evaporation

• melting

• freezing

• rusting

We can use filtration process to remove all the following from sea water, except...........

• seaweed.

• salt.

• shells.

• fish.

All the following is from the problems of desalination, except that.........

• it needs a big amount of energy.

• it needs a small amount of energy.

• it is very expensive process.

• it may cause many environmental problems.

Water of oceans and seas is considered as a mixture because it consists of water minerals and gases

• True

• False

We can use melting process to make the water of seeds and oceans drinkable

• True

• False

All people around the world can reach a freshwater easily

• True

• False

To get drinkable water from salty water we can use filtration process only

• True

• False