Soil: physical chemical change

Rain washing away soil from a hillside

• Weathering
• Erosion

Water getting into cracks, freezing, and breaking the rocks or pavement apart

• Weathering
• Erosion

What happens in ALL chemical changes?

• Change in state of matter
• A new substance is formed
• Bubbles are produced
• An explosion

Is milk going sour a physical or chemical change?

• Physical 
• Chemical

Is wood burning a physical or chemical change?

• Physical 
• Chemical

Soil is the mixture of what four different materials?

• weathered rock (minerals)

• humus

• air

• water

What kind of soil is good for growing plants?

• topsoil

• sand

• clay

• a child's stinky shoe

Which layer is the bottom of the soil profile?

• C - Partially Weathered Parent Material
• D - Separated rock
• R - Bedrock
• A - Topsoil

Which of the following processes will most likely contribute to the development of soil?

• Volcanic eruptions that make new land

• Building up of snow in very cold areas

• Migration of animals to warmer climates

• Breaking down of rock by wind, water, and ice

The weathering of rocks into small pieces forms what natural resource?

• Minerals

• Water

• Coal

• Soil