Repetition in expansion and contractions in rocks give rise to

Rocks are made up of

A. soil

B. core

C. mantle

D. crust

Water in freezing form may break the rocks in to pieces by force of

A. reduction

B. evaporation

C. expansion

D. condensation

With the passage of time the transported sediments become

A. smoother

B. smaller

C. rounder

D. all of them

The dead remains of animals and plants also accumulate to form

A. coal

B. natural oil

C. diamond

D. sedimentary layer

Weathering of rocks is affected by

A. rain

B. temperature

C. both a and b

D. erosion