Soil, Weathering and Erosion

Soil Profile

100

Which layer would you find the largest rocks?

The bedrock 

200

What is soil mostly composed of?

rock material 

300

Name the four components of soil.

air, water, minerals, organic matter

400

Name the percentage of each of the following found in soil.

Air

Water

Minerals 

Organic Matter

Air- 25%

Water- 25%

Minerals- 45%

Organic Matter- 5%

500

If the percentage of water went up in soil, which other component of soil is likely to go down?

air

Plants

100

Name the 4 things that plants need to live:

Air

Water

Light

Nutrients 

200

If plants are not growing well in a soil, what is one way to fix it?

Add nutrients 

300

Is a plant organic matter or inorganic matter? 

Organic Matter

400

What is agriculture? 

the science or practice of farming.

500

What is the main reason plants need soil?

To hold them in place.

Weathering/Erosion

100

A piece of rock from a mountaintop is found on a beach near an ocean. What is this an example of? 

erosion 

200

What are the two categories of weathering?

Physical weathering 

Chemical weathering

300

What direction does erosion move Earths materials?

downward 

400

What is weathering? 

When rocks break into smaller rock particles.

500

What are four types of weathering? 

Examples:

wind 

water

rust 

acid rain 

ice 

plant

All Mixed Up

100

We put soil in between a paper towel, folded it over and smashed it. What component of the soil came out?

Water

200

A water truck keeps the soil wet at a construction site. Why?

To keep the soil from blowing away.

300

In our soil we found a caterpillar, grass, roots and other bugs. What type of matter are these an example of?

Organic Matter

400

What gives topsoil its dark color?

Decaying and living things.

500

Name the 3 types of soil.

Sand, Silt, clay and loam

All About Dirt

100

Describe the type of soil you would like to have in a good garden.

Dark rich topsoil

soil with lots of nutrients 

good mixture of loam in soil

200

What is organic and inorganic matter?

Organic matter- living or once living

inorganic matter- nonliving 

300

Name 3 inorganic things found in soil.

Rocks, minerals, air, water

400

What is the breaking down of rocks into smaller pieces called sediments? 

weathering 

500

Name the layer that is one layer below the topsoil.

subsoil