How much of each gas is there in 100cm3 air?

Answers

Answer 1

Answer: Each 100 cm3 of air, constitutes 78cm3 nitrogen, 21cm3 oxygen and 1cm3 constitutes of other gases like Argon, ozone, carbon dioxide and water vapour in small amounts.

Answer 2

Answer: Dry air contains 78% nitrogen , 21% oxygen and 1%noble gases.

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Which type of rock has sand, minerals,and shells

Answers

Sedimentary rock has sand, minerals, and shells. They are smashed together, or cemented, together.

That would be sedimentary rock

Describe erosion in your own words

Answers

Answer:

the action of becoming destroyed and removed via air, rain, or even other natural phenomena

Explanation:

What causes genetic variation in a population

Answers

Answer: Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

What is the collection of protons and neutrons in the center of an atom called

Answers

If I am correct it should be nucleons

The collection of protons and neutrons in the center of the atom is called the nucleus.

How are chemical and physical changes alike?

Answers

They are both changing things. There is a change in the mixture/substance

Can someone help , I don’t understand how to do this

Answers

Answer:

Sometimes reading it again will help. Sometimes it really is that simple. The information doesn’t all find its way

Ask questions. I will always do my best to explain things to students, but it helps if I know when they haven’t

Figure out the best time for you to learn. I mean the best time for you to study on your own. Are you a night owl

Take good notes. I’m not going to tell you how to take good notes – it’s different for everyone.

Explanation:

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Jordan is doing a science fair project on the effect of music on the growth of tomatoes. He has two tomatoe plants,plant A and plant B, that he grows in a window and gives that same amount of water.plant A is exposed to classical music using headphones attached to the soil. Throughout the growth period, Jordan counts the number of tomatoes produced by each plant.What is the control group?What is the independent variable?What is the dependent variable?What should jordan's conclusion be?Jordan need to repeat this experiment, what should he do differently?

How do the nutrients in soil become building materials for a plant to grow?

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