Question

Which of the following are mixtures?
SELECT ALL THAT APPLY
a copper
b sand
c tea
d air
e water
f oxygen

Answer 1

The following options are mixtures:

- **b** sand (a mixture of different minerals and particles)
- **c** tea (a mixture of water, tea leaves, and potentially other ingredients)
- **d** air (a mixture of gases, mainly nitrogen and oxygen, along with other gases)

The other options are not mixtures:

- **a** copper (a pure element)
- **e** water (a compound)
- **f** oxygen (a pure element)

So, the correct answers are **b, c, and d**.