CBSE Class 7 Social Science How Surface Landforms Change Assignment Set 01

Q.1 Fill in the blanks.

a. The combined action of all processes that involve only the breaking down of rocks is known as _________.

b. The combined action of transportation and breaking down of rocks is known as ___________.

c. The region near a river’s mouth comprising a network of distributaries is called a ____________.

d. A lake of sea water separated from the main body of the sea by deposits accumulated on the sea bed is called a ___________.

e. _________ is an organic substance derived from partly decomposed plant and animal remains in the soil.

Q.2 Name any three types of landforms formed by a river in

a. Upper course - ______________, _____________, _____________

b. Middle course- ______________, _____________, _____________

c. Lower course- ______________, _____________, _____________

Q.3 Match the two columns-

               A                                                                   B

i) Estuaries                                                     a) Beaches and lagoons

ii) Glaciers                                                      b) do not involve transportation

iii) Wind                                                          c) Mushroom rocks, sand dunes

iv) Weathering, Erosion, Mass movement     d) Denudation

v) Weathering                                                 e) Moraines

vi) Chilika                                                        f) Humus

vii) Soil                                                           g) Largest lagoon (Orissa)

Q.4 Define the following terms

a) Erosion

b) Flood plain

c) Marine erosion

d) Weathering

e) Delta

f) Lagoon