Question

Which soil horizon is located closest to the earth's crust?

O horizon
A horizon
B horizon
C horizon

Answer 1

@KittyT

Answer 2

@kadyt

Answer 3

I will say it's C: horizon. What do you think @ZnappyDooZ

Answer 4

From the choices u hav, the earths crust would be...

Answer 5

I think it would be choice A...

Answer 6

Look at this picture

Answer 7

so the answer is A

Answer 8

I think so... from that picture

Answer 9

Lol u agree @KittyT?

Answer 10

i have a few more after this one

Answer 11

Hey...check it out...I think there will be an answer in here..
http://www.downtoearthfarming.org/soil-horizons.html

Answer 12

The top layer of soil that is typically visible is called the O Horizon. It is composed of organic matter, such as leaves, grass, and decaying plant material. It is typically what covers a forest floor. This material will eventually decay to form the next soil layer, Horizon A (“Soil Composition”, n.d.). The A horizon is the rich dark colored soil found a few inches down. It is made up of a combination of inorganic and organic material, meaning both minerals and living material. The E horizon, also known as the eluvial horizon, follows. It is only present in some forest soils because it is created when water becomes acidic as it leaches from the soils above. The main feature of this layer is the loss of aluminum, iron, and silicate clay (E-Horizon, 2013).

Horizon B is made up of a combination of minerals and clay. This is the same clay that is used to make pottery. This layer can be dense enough to block water from reaching the layers below. Below the B horizon is the C horizon, which is also known as the parent rock. This rock is where soil originates through weathering and erosion. At some point in the earth’s history, the parent rock was the uppermost layer of the earth’s crust. Rain, especially acidic rain, can help leach chemicals out of the parent rock and into the other horizons of soil. Leaching aids in breaking chemical bonds within the rock, making it easier for the rock to break down (“Soil Composition,” n.d.). Some common types of parent rock are limestone and granite. Limestone is high in calcium, creating a soil with a basic pH. Granite is high in sodium or aluminum and creates a soil with a neutral-to-acidic pH (“Soil Composition”, n.d.). Therefore, parent rock creates the entirety of soil; every layer finds its origins from it.

Answer 13

So yes, O horizon would be the answer

Answer 14

here is my next question

Answer 15

Below the B horizon is the C horizon, which is also known as the parent rock. This rock is where soil originates through weathering and erosion. At some point in the earth’s history, the parent rock was the uppermost layer of the earth’s crust.

Answer 16

How are the O and A horizons similar?

They both contain organic material.
They are both found below the B horizon.
They are both very dense layers of soil.
They are both part of the subsoil layer.

Answer 17

They both contain organic material.

Answer 18

Which of the following locations would have the slowest rate of weathering?

Amazon jungle
Hawaiian Islands
North Pole
New York City

Answer 19

Which of the following would have the greatest influence on soil formation?

rainfall
cloud cover
air pressure
wind speed

Answer 20

idk this one...

Answer 21

Which of the following would have the greatest influence on soil formation? rainfall

Which of the following locations would have the slowest rate of weathering? North Pole

Answer 22

Ok So i was right :P

Answer 23

Which of the following locations would have the poorest quality soil?

grasslands
mountain top
gently rolling hill
low, flat field

Answer 24

mountain top

Answer 25

Cycling nutrients between living organisms and the ground determines soil fertility.
True
False

Answer 26

http://www.extension.umn.edu/garden/fruit-vegetable/nutrient-cycling-and-fertility/

I think this link will help you...

Answer 27

So it's true?

Answer 28

Rocks formed at high temperatures and pressures are __________ weathered than rocks formed at low temperatures and pressures.

more easily
less easily

Answer 29

IDK...

Answer 30

more easily

Answer 31

Acidic soil is caused by _____.

potassium (K)
sodium (Na)
calcium (Ca)
hydrogen ions (H+)

Answer 32

hydrogen ions (H+)

Answer 33

@KittyT, u kno ALOT more than i do, I'm only in 10th grade :p

Answer 34

im in 11th and yall moth know a lot more then i do

Answer 35

i made an 84 i missed one question

Answer 36

Thanks for both of your cute and sweet comments. Yes! I'm only a 9th Grader. :) Don't said that we're just helping each other when we're needed...right? @shortycme @ZnappyDooZ Thank you for each of of you. You made my day. :) Love ya

Answer 37

Oh really...you missed one question..ohhh sorry :(

Answer 38

Well it was really close man, hope u can get it better next time ^_^

Answer 39

Yeah..good luck in next time Bro! I bet you can do more than that

Answer 40

its okay i still passed thats all that counts

Answer 41

i have more questions will yall help me on them to please @KittyT @ZnappyDooZ