Forensic Sci: Soil Evidence

Which horizon is made up of partially weathered rocks?

• Horizon A

• Horizon B

• Horizon C

• Horizon D or R

Which of the following is NOT a main grain size?

• sand
• silt
• soil
• clay

In which horizon is most of the HUMUS?

• Horizon A

• Horizon B

• Horizon C

• Horizon D or R

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

Soil is made of

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

Newer sand will have ________ edges and older sand will have ________ edges.

• smooth; rough

• rough; smooth

Sand, silt, and clay are defined by the ________ of the particles.

• Chemical properties

• Mineral content

• Color

• Size

Soil is always individual evidence.

• True

• False

The top layer of soil is called ________.

• bedrock
• topsoil
• subsoil
• grass

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

• clay
• silt
• sand
• gravel