Rocks can be broken down into small particles by exposuring to all of the following ,except

• rain water
• wind
• moon
• water waves

Dissapearing a part of sandcastle due to the effect of sea waves means that all the following have changed,except..

• its shape
• its colume
• its size
• its colour

Sand is formed due to breaking down of …..

• glass
• wood
• rocks
• plastic

The deep narrow valley with slopes at its sides and often with water stream flowing through it is known as a ……

• canyon
• mountain
• hill
• river

The force of wind plays an important role in erosion, because it can transfere …..

• sound energy
• light energy
• small sized-particless of sand
• very large pieces of rocks

The formation of canyons takes….

• few minutes
• few hours
• few days
• many years

All the following are processes that can change the Earth's surface, except……

• digestion
• erosion
• weathering
• deposition

The condition of atmosphere including temperature,wind and rains is known as……

• weather
• weathering
• erosion
• deposition

Rusting of a statue is an example of the action of …..process

• deposition
• erosion
• mechanical weathering
• chemical weathering

All the following are from causes of chemical weathering , except….

• oxygen
• water
• acid rains
• clouds