Question

13. The air, soil, and most foods and beverages are examples of?

A. elements
B. compounds
C. pure substances
D. mixtures

Answer 1

D) mixture

Step-by-step explanation:

Air is a mixture of different gases

Soil is a mixture of different compound compositions

Most foods and beverages are a mixture of different ingredients

Answer 2

D. Mixtures

Step-by-step explanation:

Let's define the options in the question.

1. Elements: They are substances that cannot be broken down into additional substances. Examples include Fe(iron), Zn(zinc) and H(Hydrogen)
2. Compounds: They are formed when two or more elements are chemically combined e.g. NaCl (it’s made from sodium-Na and Chlorine-Cl).
3. Pure substances: These are distinct substances. It can comprise of either elements or compounds but not both. Examples include pure Iron or pure crystals of NaCl salt
4. Mixtures: These are substances that are made by adding two or more types of substances (elements or/and compound). However, unlike compounds, the components in a mixture can be easily separated through simple physical process like heating, distillation etc. Examples include a mixture of water (H2O) and salt (NaCl). The solution can be easily separated into its components by boiling.

Air soil and most food and beverages are NOT pure substances. They are made of by more than one substance (elements or/and compound). However, the components in air, soil and food items can be separated easily. For example. Gravel and sand in soil can be separated by a sieve. Similarly, air is a mixture of multiple gases, i.e. hydrogen, oxygen, nitrogen etc.

Therefore, the correct answer is D.