What are mixtures?

Which of the following are mixtures? (choose 2)

• carbon dioxide

• soil

• diamond

• air

A pure substance is...

• made up of two or more types of stuff.

• made up of only one type of stuff.

• made up of three or more types of stuff.

• a mixture

Which of the following are pure substances? (choose 2)

• chocolate flavoured milk

• purified water

• vitamin C

• soil

If a substance seems to be uniform throughout then it must be pure.

• True

• False, it must be a mixture in which you can't see the components

• False, it might be pure or it might be a mixture in which you can't see the components

• I'm not sure

Mayonnaise is a mixture containing tiny oil droplets spread throughout vinegar. These two components are:

• both gases

• soild and liquid

• solid and gas

• both liquids

Shaving foam is made of:

• liquid and gas components

• solid and gas components

• solid components alone

• liquid components alone

If a shampoo bottle is labelled as 100% pure but has 20 different ingredients, is it considered as a pure substance?

• Yes because each ingredient in it is pure

• Yes because each ingredient in it is natural

• No because It is not pure in the scientific sense as it is a mixture of different ingredients.

• Yes because it does not cause hair loss

Pencil leads are a mixture of:

• graphite and clay

• graphite, clay and wax

• graphite, clay and water

• graphite and wax

Why is mud is a mixture?

• Because the soil particles in it are spread throughout water particles and no new substances have been formed.

• Because the soil particles in it are mixed together

• Because mud can be easily mixed with a wooden stick

• Because the soil particles in it are clumped together

What is whipped cream made of? (choose 2)

• Air- which is made of gas particles

• Air- which is made of solid particles

• Cream- which is made of solid particles

• Cream- which is made of liquid particles