Biology Middle School

How is a mixture different from a pure substance?

A) Mixtures can be separated by physical means.
B) A pure substance is heterogeneous.
C) Pure substances are made up of mixtures.
D) A mixture is made of one substance.

Answers

Answer 1
I think it’s A because a mixture is made up of multiple matters so D is incorrect, C is a single kind of matter, meaning it cannot be made of different mixtures so thats also incorrect. B is also incorrect because heterogeneous is a fancy way of saying “mixture”, therefore it would be incorrect. A is correct because mixtures can be separated i ways such as evaporation, distillation, and etc.

Your welcome!
Answer 2
The answer is A) Mixtures can be separated by physical means.

Related Questions

Describe the makeup of the universe. Be sure to include the following points in your answer.
1. The different types of objects found in the universe
2. The differences in temperatures of stars
3. The relationship between color and temperature of stars

Answers

Answer:

The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

Explanation:

I don’t know the answer to 1 or 3 but I do know the answer to two which is
The different temperatures of stars is the many of atoms that each star has

Which statement is correct?(1 point)
Responses

There is a thin layer of topsoil in temperate areas.
There is a thin layer of topsoil in temperate areas.

There is a thin layer of topsoil in tropical rain forests.
There is a thin layer of topsoil in tropical rain forests.

There is a thick layer of humus in cold deserts.
There is a thick layer of humus in cold deserts.

There is a thick layer of humus in dry deserts.
There is a thick layer of humus in dry deserts.

Answers

There is a thin layer of topsoil in temperate areas and There is a thick layer of humus in cold deserts are the correct statements.

What are the characteristics of top soil?

Topsoil is the upper layer of soil. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs.

Topsoil is composed of clay, silt, sand, and other organic matter that is removed from the top 12” of earth during development projects. It is useful for grading and is sometimes used for direct planting if it is of suitable quality.

You certainly can use topsoil for potted plants, but that doesn't mean you should. If you do, your plant probably won't get the nutrients it needs, won't grow at the rate you expect and will be likely to die sooner. The best topsoil for vegetable gardens may not be topsoil at all.

Learn more about top soil:

https://brainly.com/question/10235150

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I need more help. 100 Points! (Again)
What are the answers to 1 - 9

Answers

Answer:

1] Valence electrons.

2] Electrons.

3] 2 electrons.

4] 8 electrons.

5] 18 electrons.

6] The nucleus.

7] Protons.

8] Neutron.

9] Orbit / Nuclear envelope.

Explanation:

HOPE IT HELPS......

PLEASE MARK ME AS THE BRAINLIEST.....

HELP, Please It's for a grade! 100 Points!!!
What's the answer to questions 10, 11, 12, and 13.

Answers

10. Atomic number
11. Chemical symbol
12. Name of element
13. Atomic mass
Atomic number

Chemical symbol

Name of element

Atomic mass

I hope this helps

Why are farming practices like terraced fields important in terms of soil conservation?(1 point)
Responses

They help limit the amount of soil that is produced, which is essential because soil is a renewable resource.

They remove pollutants from the soil, which is essential because living things depend on pollutant-free soil.

They cause nutrients in the soil to leak out, which is essential because plants need nutrient-poor soil.

They prevent soil from eroding and becoming lost, which is essential because soil is a nonrenewable resource.

Answers

Answer: They prevent soil from eroding and becoming lost, which is essential because soil is a nonrenewable resource. Mark brainliest!

Explanation:Why are farming practices like terraced fields important in terms of soil conservation? They prevent soil from eroding and becoming lost, which is essential because soil is a nonrenewable resource.

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