Year 7 Science (Revision)

What is the formula for density?

• density = mass x volume

• density = mass / volume

• density = mass + volume

• density = mass - volume

The density of every objects is different.

• True

• False

This picture represents which of the following?

• element

• mixture

• compound

Which of the below is correct?

• The independent variable is distance

• The independent variable is d=25 t

• The dependent variable is time

• The dependent variable is distance

What is the density of a substance that has a mass of 30g and a volume of 6 liters?

• 24 g/l

• 36 g/l

• 5 g/l

• 180 g/l

Objects that are less dense than water will ________.

• Float

• Sink

A piece of copper has a mass of 89g and a volume of 10 cm3. What would be the density of the copper?

• 0.89 g/cm3

• 8.9 g/cm3

• 89 g/cm3

• 890 g/cm3

Which one of the following would you use to separate sand from iron filings?

• A bar magnet

• Filter paper

• Chromatography paper

• Alum

Which of the following sets of substances represents mixtures only?

• Blood, seawater and air

• Gold, carbon and air

• Air, blood and sodium chloride

• Orange juice, sodium and hydrogen

How much money would you make for working 10 hours?

• $64

• $68

• $72

• $24