Soil and Glass

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

• sand
• silt
• clay
• gravel

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

• sand
• silt
• clay
• gravel

What soil type would 30% clay and 40% silt, and 30% sand be?

• clay
• silty clay
• clay loam
• silty clay loam

What soil type would 20% clay and 70% silt, and 10% sand be?

• sandy loam
• silty clay
• clay loam
• silt loam

Which of the following is NOT a main grain size?

• sand
• silt
• soil
• clay

Which type of soil can hold the greatest amount of water?

• sand
• silt
• clay
• loam

Which of the following greatly increase the probative value of soil evidence?

• Artifacts and contaminants

• Rocks and minerals

• Sand, silt, and clay

• Organic matter

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 bright halo that appears near the border of a glass particle that is immersed in a liquid of a different refractive index is called the:

• border line
• refractive line
• Becke line
• immersion line