concept 2 lesson 3 grade 5 second term

Most of water on Earth is.................................

• a mixture of fresh and salt water that is found in estuaries.

• fresh water that is found underground.

• salt water that is found in oceans and seas.

• fresh water that is found in lakes.

The area of land where all the water flows to a common location as ocean is

called a........................

• a. tributary.

• b. estuary.

• c. wetland.

• d. watershed.

The level of water in a river may increase causing flooding, when there is

more..................................................

• a. rainfall.

• . b. wind.

• c. sunlight.

• d. sediments.

Tributary usually ends by the flowing of its water into bigger................

• a. ocean.

• b. sea.

• c. river.

• d. lake.

The correct flowing of water bodies that are connected with others is ....................

• a. bigger rivers — tributaries — oceans.

• b. tributaries —» bigger rivers —— oceans.

• ©. oceans —» tributaries ——» bigger rivers.

• d. bigger rivers —— oceans ——» tributaries.

All the following reasons cause water pollution in a river, except.........................

• a. litter of a nearby trash dump.

• b. waste of a nearby factory.

• c. chemical fertilizers of a nearby farm.

• d. building a dam across the river.

7. Which of the following can pollute the water of a tributary by the effect of wind

blowing ?...................................................

• a. Liquid waste materials of factories

• b. Water that flows through dams.

• c. Light litter of trash dumps.

• d. Sediments in the water of rivers.