AMIS-SOIL FORMATION & ROCKS

Humus is.....

• the dead parts of plants and animals in soil.
• A food we eat with pretzels.
• The tiny particles inside of soil
• The roots that come off of a plant and live in soil.

Which are contained in soil?

• Small rock fragments and air
• Inorganic humus and dead animals
• Earthworms and crete
• Landslides and water

What is the movement of soil from one place to another?

• weathering
• deposition
• discharge
• erosion

Soil formation begins with the weathering of_______.

• Humus
• Subsoil
• Litter
• Rock

Decayed organic material turns into dark colored material called __.

• litter
• clay
• humus
• soil

This rock was another type of rock that was heated and compressed over time. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic

This rock started as molten magma. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic

This rock was formed by smaller pieces of rock that settled at the bottom of a lake millions of years ago. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic

Cooling & crystalization produce

• igneous rocks
• metamorphic rocks
• sedimentary rocks

The process when rocks break into smaller pieces due to exposure to natural elements is called

• erosion
• weathering
• sediments