Level 2️⃣ Video #2: Brainpop - Soil and Soil Layers

What is humus?

• Humus is organic material left behind by living things.

• Humus is material left by breaking up non-living things.

• Humus is the material you get when you process chickpeas and is best eaten with pita bread.

Weathering is 

• the process of breaking down rocks and minerals through contact with the atmosphere.

• the process of moving rocks and minerals from one place to another.

• the process by which clouds and precipitation form through the water cycle.

Erosion is 

• the process which moves rocks and further breaks them down.

• the process by which rocks are built into mountains.

Humus helps

• both plants as well as animals that live in the ground.

• only the plants that grow in the soil.

• only the animals that live in the soil.

The process of breaking down rocks and creating soil takes

• thousands of years.

• hundreds of years.

• a few days.

How many layers is soil made of?

• 3

• 4

• 5

What is another name for horizon A?

• Bedrock

• Subsoil

• Topsoil

What is another name for horizon B?

• Topsoil

• Subsoil

• Bedrock

The top layer of soil (horizon A) has

• more humus than the second layer of soil (horizon B).

• less humus than the second layer of soil (horizon B).

• about the same amount of humus than the second layer of soil (horizon B).

If you keep digging far enough you will hit:

• bedrock (rock that hasn't been broken down yet).

• more soil that hasn't been leached.

• a very large layer of small rocks and other pieces of minerals.