What's the Dirt on ... Dirt?

According to the video what factor can determine the soils composition?

• parent material that the soil is made out of

• location 

• time

• amount of water

The three sizes of rock, from largest to smallest are

• silt clay and sand 

• Sand silt and clay

• clay silt and sand 

• silt sand and clay 

How do animals help get more air and water into the soil

• They dig holes and tunnels in the soil, allowing more water and air to trickle in

• When they die, they become humus for the soil 

• They live on the soil 

• They compact the soil, making each particle closer together

What does organic mean? 

• never living 

• can be found in nature 

• once living 

• made by nature 

Tags

CCSS.RF.3.3B

CCSS.RF.3.3C

CCSS.RF.3.3D

CCSS.RF.4.3A

CCSS.RF.5.3A

Organic matter is anything that is alive (worms, microbes)  or was once alive (dead and decaying plants, and animals).  

• False

• True

These fungi, bacteria, insects, and worms are called

• decomposers

• plants

• animals

• humus 

Humus is important because it contains a lot of 

• plants

• animals 

• nutrients

• decomposters 

True or false, a metal chair, if left outside long enough, will become humus. 

• true

• false

Why is the top layer the darkest?

• it contains the most amount of earth worms 

• It contains the most broken down organic material  

• it contains the least amount of rocks

• it contains the most amount of rocks 

Tags

CCSS.RI.4.5

CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

What do we call the 4th layer?

• sand silt and clay 

• bed rcok 

• top soil 

• organic material