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Delta Modern Language School
Grade 4
Date ......./......./………

Exercises on Unit (4) concept (2)

Q. (1) – Complete the following sentences: -

1-Rainwater is pulled downhill forming small streams due to the effect of ………
2-Rivers can make new lands from sediments by the effect of……………. process.
3-When the amount of rainwater increases the sides of canyon may get…………
4-The Nile River Delta is formed due to …………….……... process.
5-By the effect of water stream, the ……………. will form.

Q. (2) – Choose the correct answer:

1-When the force of wind increases. the distance of sand travel…………………...

a) increases. b) doesn’t change. c) decreases. d) is constant.

2-The …………. are formed when something blocks the path of wind carrying sand.

a) Mountains. b) valley. c) sand dunes. d) rivers.

3-……………. are formed by the effect of water stream

a) Mountains. b) Dunes. c) Hills. d) canyons.

4-Deltas are formed when the speed of river water ………………

a) increase. b) decrease. c) be constant. d) faster.

Q. (3) – Put (√) in the front of the right statement and (×) in the front of

the wrong one: -

1. The walls of valley are vertical and steep. (…….)
2. The shape of large rocks in desert changes over time (…….)
3. Sand dunes are formed by erosion only. (…….)
4. Wind cannot break down rocks. (…….)
5. Nile River Delta has a rectangular shape. (…….)

Q. (4) – Write the scientific term for each of the following:

1-Special type of valley which its sides are steep. (………..……..….)

2-The two processes that have the main role in formation of canyon.(………..……..….)
3- The process by which wind carves the rocks into different shapes. (………..……..….)

4- Land area that is formed by deposition process when a river enters a lake or a sea.
(………..……..….)

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