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ollegr [7]
3 years ago
9

Most of the coal found on Earth today was formed during the Carboniferous and Permian Periods. About how old could a piece of co

al be?
Biology
1 answer:
Law Incorporation [45]3 years ago
5 0

Answer: 298.9 million years old

Explanation: hope it helps luv ❤✨

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What is TRUE about the relationship between cells and the organism that they are a part of?
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Its A ive done it before if you need proof here http://assessment.aaas.org/items/CE056001#/0

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How did you test your hypothesis? which variables did you control in your experiment and which variable did you change in order
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Hypothesis is a proposed explanation which is made on the basis of given experimental data taken as starting point for further investigation. All hypothesis test are conducted in a same manner fiollowing the four main steps:

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4. Final step is to analyze the results

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Chemistry
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1) Protons, Neutrons, Electrons
1) Protons are positive, electrons are negative, and neutrons are neutral/have no charge

2) Identity

3) Protons, Electrons (neutral atom), same

4) mass number, nucleus

5) isotope, same

6) Lithium: LI, 3
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Iron: Fe, 26
Copper: Cu, 29
Oxygen: O, 8
Mercury: Hg, 80
Krypton: Kr, 36
Helium: He, 2

7) Uranium: U, 92
Chlorine: Cl, 17
Boron: B, 5
Iodine: I, 53
Antimony: Sb, 51
Xenon: Xe, 54

8) a. Iron (Fe)
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hope this helps!
7 0
4 years ago
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