Question

Task 1: Rewrite the sentences if you think they are wrong

All matter is made of tiny particles called elements
…………………………………………………………………………………………………………………………………………………………
An element is a substance made of one atom
…………………………………………………………………………………………………………………………………………………………
Air, sea water and oxygen are mixtures
…………………………………………………………………………………………………………………………………………………………
Compounds are easily separated as their atoms are not chemically joined together
…………………………………………………………………………………………………………………………………………………………

Answer 1

1. It is false. All matter is made up of tiny particles called molecules
2. It is true
3.it is false air, seawater and oxygen are compound.
4. It is true

Answer 2

1. All matter is made up of tiny particles called atoms.

2.An element is a substance made up of one kind of atom.

3. Correct

4. Compounds are not easily separated as their atoms are chemically combined together.

Step-by-step explanation:

Matter: Anything that has weight and occupies space is called matter.

Atom: The smallest part of a substance that cannot be broken down chemically.

3. Air that mostly contains nitrogen and oxygen is the mixture because it is made of two different gases. Saltwater is made up of salt and water. Therefore, it is also a mixture. The elements hydrogen and oxygen react to form a new compound, water.

Compound: A substance made up of two or more different chemical elements combined in a fixed ratio.

Mixture: Two or more substances that are mixed together but not chemically combined