Question

Write T for true and F for false.
1. The mantle is in a semi-solid state.
2. Rocks have a definite chemical composition.
3. Nickel is a fossil fuel.
4. The Earth has uniform minerals.
5. Gypsum is a chemically formed sedimetary rock.​

Answer 1

Answer:

1. Something is wrong in Question

2. True.

3. False

4. True.

5. True.

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Answer 2

Answer:

1.T

2.F

3.F

4.F

5.T

Explanation:

5.

Gypsum is a common mineral, with thick and extensive evaporite beds in association with sedimentary rocks. Deposits are known to occur in strata from as far back as the Archaean eon. Gypsum is deposited from lake and sea water, as well as in hot springs, from volcanic vapors, and sulfate solutions in veins.

2.

First, a rock is composed of one or more minerals and sometimes mineraloids but do not have a crystal structure. A mineral is a chemical substance made up of one or more chemicals having a definite crystal structure. Rocks do not have a definite chemical composition whereas minerals do

3.