Question

5 which set of science notes best describes mixtures?
a

• mixtures keep the properties of their components.
• mixtures involve chemical changes.
• mixtures cannot be separated.

b

• mixtures are combinations of two or more substances.
• each substance has its own physical properties.
• mixtures can be separated.

c

• mixtures are formed when substances combine chemically.
• mixtures can only exist in liquid form.
• mixtures cannot be separated once combined.

d

• mixtures must include one solid and one liquid.
• mixtures create new substances with different properties.
• mixtures are always evenly distributed.

Explanation:

• Option A is incorrect: Mixtures form via physical changes, not chemical, and can be separated (e.g., filtering a sand-water mixture).
• Option B is correct: Mixtures are physical combinations of two+ substances, each retains its physical properties, and they can be separated using physical methods.
• Option C is incorrect: Mixtures form physically, exist in solid, liquid, or gas forms, and can be separated.
• Option D is incorrect: Mixtures can be any combination of states (e.g., air is a gas-gas mixture), do not create new substances, and heterogeneous mixtures are not evenly distributed.

Answer:

B.

• Mixtures are combinations of two or more substances.
• Each substance has its own physical properties.
• Mixtures can be separated.