SCIENCE 5

It is the breaking down of rocks into fragments.

• erosion

• flooding

• run off

• weathering

A type of weathering that involves change in the composition of the rock.

• chemical

• mechanical

• both chemical and mechanical

• none of the above

What do you call the process by which humans extract stones from the mountains for construction purposes?

• digging

• flattering

• quarrying

• weathering

What will happen to a rock when it is exposed to higher temperature?

• contracts

• evaporates

• expands

• sinks

The following are agents of weathering EXCEPT ____.

• stigma

• temperature

• water

• wind

The following are human activities that can aggravate the effects of soil erosion in the environment, except?

• illegal logging

• reforestation

• mining

• quarrying

The soil sediments pile up and become hard like a rock that may prevent the cycle of water in dams. This is called?

• erosion

• lanslide

• flooding

• siltation

Soil erosion changes the ____ as water seeps through the mountain and causes landslide.

• landform

• rock

• water

• all of the above

Soil erosion causes ____ due to few roots of plants that can grow to absorb water.

• air pollution

• flood

• food shortage

• siltation

What will happen if there will be lesser and poor harvest of crops?

• The economy of the country will be affected.

• There will be a food shortage in the community.

• The food will be expensive.

• All of the above.