Soil erosion

Q1. What is a major cause of soil erosion?

• Running Water

• Overgrazing

• Agricultural Activities

Q7. What is soil erosion?

• A naturally occurring process that affects all land forms

• Type of soil

• A time period

• The wearing away of top soil

Humus is:

• the part of soil made up of decayed parts of once-living things.

• a dip that is made of garbanzo beans.

• a bone that can be found in the upper arm.

• a sound people make when their lips are together.

The very top layer of soil is mostly made of

• Solid rock

• Clay and mineral deposits

• A mixture of minerals and organic material

• Mostly organic material (humus)

What is a major cause of soil erosion?

• Running Water

• Overgrazing

• Agricultural Activities

What is ONE type of soil erosion?

• Earthquakes

• Animals

• Gully

What does deforestation mean?

• Replanting of areas of forest which have previously been damaged or cut down.

• The planting of woodland or forest on land where there are no existing trees.

• When a forest is clear fell and the land is not replanted but used for something else.

What are the effects of deforestation ?

• loss of habitat
• increased green house gasses 
• soil erosion and flooding
• all of the above

Deforestation causes an increase in atmospheric carbon dioxide

• true

• false

Why does cutting down trees increase global warming?

• trees soak up carbon dioxide
• trees provide shade which counteracts global warming
• trees absorbs the sun's energy without radiating back into the atmosphere
• trees drain greenhouse gases like methane from soil