Page 17 - welcome home to DMLS

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

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

1-They are deep valleys covered by flowing water. (………………..………)
2-The condition of atmosphere at a specific time and place. (…………………….…)

3-Process in which small broken rocks move from a place to another by the help of wind

or water. (…………………..…....)

4-A process in which the colors of paints of houses are changed as a result of falling of

acid rains. (……………………..….)

5-A fan-shaped (triangular) mass of sediment that is formed where a river enters a larger

body of water like seas. (….…….……..………..)

Q. (5) – Give reason for:

1-Iron in rocks may rust.
…………………………………………………………………………………..………
2-Water play an important role in the formation of limestone caves.
……………………………………………………………………………………….…..

Q. (6) – What happens when:

1-Lichens growing on rocks produce acids.
……………………………………………………………………….…………………..
2-A river carries sediments meet a sea.
…………………………………………………………………………………..……….

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