NO ONE HAS ANSWERED
1. How do microorganisms affect the quality of soil?
by breaking down the remains of dead organisms***
by creating tunnels
by absorbing water
by increasing mechanical weathering
2. How does the C horizon form?
Rainwater washes clay and minerals from the A horizon to the C horizon***
Plant roots weather pieces of rock.
Plants add organic material to the soil.
Bedrock weathers, and rock breaks up into soil particles.
3. What makes up soil besides rock particles, minerals, air, and water?
color and chemistry
texture and pore space
decayed organic matter***
oil
4. A geologist is studying a layer of soil in the Sahara. The soil layer contains little humus but a lot of clay and other rock particles. Which soil layer is it?
A horizon
B horizon***
C horizon
bedrock
A
D
C
B
You’re welcome
I GOT AN 100
It’s
A
D
C
B
Science 7b lesson 5 unit 4 ecology quick check
YOU WERE WRONG. 2. WASN'T RIGHT, I GOT A 75%!
The first three are right. I don't know the fourth.
Holy smoke! Did you look at the answer choices for #4?
=(