Question

Mixtures _____.

cannot be separated by physical means
are the same as compounds
are always solutions
are not chemically united

and

Sand is made of different types of rocks. The shapes and sizes of the rocks are not all the same. Sand is a ___.

compound
solution
mixture
solute

Answer 1

Mixtures are not chemically united, so they can be divided using physical methods.

Sand is a mixture. (Because different rocks have different chemical compositions.)

Answer 2

Answer:

Mixtures are not chemically united.

Sand is a mixture.

Explanation:

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.

• They can be separated by the help of physical means.
• Chemically inactive that is they are not united by chemical interactions.

Sand is made up of rocks which are different from each other along with different chemical composition which indicates that they are  very much different from one another.

Rocks present in larger size can easily be separated from the smaller rock pieces present in sand without trouble.