Fill in the blanks.

1. The _____________ are responsible for formation of mountains and deep sea trenches.
2. A series of mountains that are close together is known as a _____________.
3. Glacial valleys have a _____________ structure.
4. A plateau formed by uplifting of the earth's crust is called a _____________ plateau.
5. Alluvial plains are formed by _____________ deposits.

Tick the correct answer.

1. The term used for mountains with frozen rivers of ice.
   1. plateaus
   2. hills
   3. valleys
   4. glaciers
2. Name the plains that are formed by wind deposition.
   1. Structural plains
   2. Alluvial plains
   3. Loess plains
   4. Lake plains
3. Rift valley is formed by
   1. Flowing river
   2. Movement of glaciers
   3. Broadening of the Earth's crust
   4. Shrinking of the Earth's crust
4. The age of old fold mountains is
   1. More than 200 million years
   2. Less than 5 million years
   3. 10 to 25 million years
   4. 100 million years
5. The Mexican plateau is called
   1. A mineral store
   2. A water store
   3. A timber store
   4. A metal store

Match the following.

State whether true or false.

1. Mountains are formed within a short period of time.
2. Mountains are habitat of wildlife.
3. Rift valleys have a U-shaped structure.
4. The Great Plains of the USA is a type of erosional plain.
5. About 80% of the world's population lives on plateau.

Explain endogenous and exogenous processes.