Biology Middle School

Which layer of soil is generally hard and packed?

bedrock
topsoil
subsoil
parent material

Answers

Answer 1

Answer:

Bedrock is the layer of soil that is generally hard and packed.

Answer 2
C. Subsoil
Subsoil is made up of small particles that has very little living/once was living materials, which makes them hard and packed.

Related Questions

The beach in Antibes, France, is composed of small, smooth rocks that have been worn
down by being tumbled against each other by the energy of the sea water

Physical or chemical?
Specific type of physical or chemical

Answers

Answer:

the second answer is the second answer

it is physical weathering and abrasion

How can humans manipulate soils? Select all that apply.

removing bedrock
changing the acidity
adding decaying material such as mulch
adding nutrients

Answers

Answer:

All of the options are correct:

Explanation:

adding decaying material such as mulch and adding nutrients

Abrasion can occur due to what? Select all that apply.

water
gravity
wind
altitude

Answers

Answer:

Water, gravity, and wind can all cause abrasion. Altitude is not a factor in abrasion.

Explanation:

Answer: Altitude is not a factor in abrasion. The option which is left behind is the wrong answer

Explanation:

What types of organisms do chemical biological weathering? Select all that apply.
sea urchins
lichens
bacteria
trees

Answers

My guess would say Lichens and Bacteria because of course so bacteria breaks down and Lichens are a type of fungi
Lichens
Bacteria
Trees

I will give brainiest
Please no jokes or incorrect answers
Sorry if I picked the wrong subject
(20 POINTS)

Answers

he eat is he eat it for lunch

I think E I don’t know why but I do, I may be wrong

Choose the answer that describes biological weathering.
lichen growing on rocks
stone and boulders moved by water
salt crystallization forming tafoni
acid in water acting on limestone

Answers

Answer:

Acid in water acting on limestone describes biological weathering.

Explanation:

Acid in water acting on limestone

How can biological weathering result in chemical erosion?

Roots loosen soil and break rocks.
Large herds trample rocks and break up soil.
Plants transpire water vapor.
Bacteria release acids and other agents that break down rock.

Answers

Answer: Biological weathering only refers to weathering caused by organisms -- animals, plants, fungi and microorganisms such as bacteria. While certain forms of biological weathering, such as the breaking of rock by tree roots, are sometimes categorized as either physical or chemical, biological weathering can be either physical or chemical

Explanation:

Answer:

Biological weathering can result in chemical erosion through the action of bacteria that release acids and other agents that break down rock.

Explanation:

As the bacteria colonize rocks and soils, they produce organic acids and other metabolic products that react with the minerals in the rock, causing them to break down and dissolve. Over time, this process can weaken and erode the rock, leading to chemical erosion. Additionally, the action of roots can also contribute to chemical erosion by releasing organic acids into the soil, which can further break down rock and mineral surfaces.

This is timed Please Help

Answers

Answer:

Answer:

1. physical

2. chemical

3. physical

4. physical

5. chemical

6. physical

7. physical

8. chemical

9.physical

10. physical

11. chemical

12. chemical

13. physical

14. chemical

15. physical

16. chemical

17. physical

18. chemical

19. chemical

20. chemical

21. chemical

Explanation:

Physical changes can usually be reversed, and no new substances are created in a physical change. In a chemical change, it can’t be reversed, and there is a creation of new substances.

With this in mind:
Freezing juice is a PHYSICAL change (it can be reversed easily if the juice ice is melted, and no new substances are created)
Exploding fireworks is a CHEMICAL change (it happens due to combustion, which produces heat and light as new products, and you can’t undo the explosion of the fireworks)
Melting a chocolate bar is a PHYSICAL change (it can be reversed easily, and there are no new products as it’s the same chocolate, just as liquid)
Cutting grass is PHYSICAL (no new products are created, and whilst it can’t technically be reversed the grass will grow back, so eventually it will go back to its original state)
Rotting bananas is a CHEMICAL change (the rot creates a new substance on the bananas and it can’t be reversed)

With this logic, we can continue answering the rest.
Cutting hair is PHYSICAL
Squeezing oranges is PHYSICAL
A log burning in a fireplace is CHEMICAL
A change that does not result in a new substance is PHYSICAL
Dissolving sugar in water is PHYSICAL (this one can be tricky but it’s important to remember it can be reversed via evaporation and no new product is technically created)
Rust on an iron fence is CHEMICAL
Cake batter baked in an oven is CHEMICAL
Blue and yellow pain being mixed is PHYSICAL (while a new colour is produced and the change isn’t reversible, the change is chemical as the structure of the paint is exactly the same and no new substance is technically created)
Photosynthesis is CHEMICAL
Glass being shattered is PHYSICAL
Boiling water is PHYSICAL
Burning coal is CHEMICAL
Melting butter is PHYSICAL
Cooking eggs is CHEMICAL

When the oxygen in the air combines with the iron exposed by paint peeling off an old
bicycle, a new, red-colored, crumbly substance is formed.

Physical or chemical?
Specific type of physical or chemical

Answers

Answer:

Chemical change

Explanation:

it’s chemical and oxidation

Keiko said the three areas where volcanoes form are at convergent, divergent, and transform plate boundaries. How should Keiko’s answer be corrected?
Hot spots should replace divergent plate boundaries.
Subduction zone should replace convergent plate boundaries.
Subduction zone should replace transform plate boundaries.
Hot spots should replace transform plate boundaries.

Answers

Answer:

Hot spots should replace transform plate boundaries.

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