Soils Investigation 1 Assessment-FOSS

What is humus?

• the largest particles that makes up soil
• the bottom layer of soil that makes up the earth's surface
• remains of decayed plants and animals that form the layer above topsoil

What is bedrock?

• remains of decayed plants and animals that form the layer above topsoil
• the bottom horizon of soil that makes up the earth's surface and is solid rock
• a hard bed of broken rock

A layer of soil is also known as a ........

• the breaking down of rock
• horizon
• remains of decayed plants and animals that form the layer above topsoil

Topsoil is best described as.....

• a layer of soil where a lot of nutrients, humus, water and burrowing animals can be found
• a layer of soil that has unweathered rock
• a layer of the soil where legos, worms, rock, and nutrients are

Which type of soil is perfect for gardening or farming?

• clay
• sandy
• loam

Which soil type is described as "heavy" with close and tight particles?

• clay
• sandy
• loam

Subsoil is a layer of soil that....

• that has a lot of nutrients, humus, water and burrowing animals can be found
• hold legos, worms, rocks, and nutrients
• may contain some water and minerals, silt, and broken rocks

Which type of soil is rough to the touch and does not hold water well?

• clay
• sandy
• loam