Describe the difference between the terms “element”, “compound”, “molecule”, and “salt”.

Answers

Answer 1

Answer: You can define an element as a substance with only one type of atom in(e.g. only sulphur atoms). If a substance has more than one type of atomin, then it is either a compound or a mixture, depending on whether theelements have bonded. Examples of elements are:

Oxygen
Sulphur
Carbon
Hydrogen
Protactinium

Compound-
A substance made up of atoms of two or more different elements joined by chemical bounds.
Molecule- a pure substance that cannot be broken down
Salt- A Ionic Compound Formed From The Reaction Of An Acid And Base .

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The diagram below shows different layers of sedimentary rocks.Picture showing seven layers of rocks of different colors labeled A, B, C, D, E, F, and G from top to bottom; A and B are parallel horizontal layers at the top of the diagram and C, D, E, F, and G are slanted layers with C closest to the surface and G at the bottom.

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B.Layer C is older than Layer E.
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D.Layer B is younger than Layer G.

Answers

D. layer B is younger than layer G.

Answer:

The correct answer is D.

Layer B is younger than layer G

How does a warm front form

Answers

A warm front occurs when a cold air mass retreats and is replaced by a warm air mass

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