Soil -Forensics

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

What do we call the layers of soil?

• Deposits
• Horizons
• Minerals
• Rocks

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)

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil

What does weathering mean?

• To form or create new
• To build up
• To break down
• To completely destroy

This type of soil is sticky when wet and hard when dry. 

• clay
• silt
• sand
• gravel

Are there minerals in soil?

• Yes
• No

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

Chemical Properties of soil would include

• pH

• trace chemicals

• color

• pH and trace chemicals

Soil with a gritty texture is most likely heavily composed of:

• sand
• silt
• clay
• gravel