Review Unit 3 Science Y9

A student wants to measure the density of a piece of rock. She starts by measuring its mass and finds that it is 2500 g.
Next she puts 500 cm³ of water into a large measuring cylinder, then adds the rock. The level in the measuring cylinder rises to 800 cm³.
What is the density of the rock?

• 8.33 g/cm³

• 3.125 g/cm³

• 0.12 g/cm³

• 0.32 g/cm³

The two diagrams below show a measuring cylinder. In the diagram on the left, the measuring cylinder is empty. In the diagram on the right, the measuring cylinder contains a liquid. what is the density of the liquid?

• 0.20 g/cm3

• 5.00 g/cm3

• 0.28 g/cm3

• 3.57 g/cm3

A lump of butter has a volume of 350 cm³ and a mass of 319 g. What is the density of the butter?

• 31 g/cm³

• 1.10 g/cm³

• 1.00 g/cm³

• 0.911 g/cm³

A cube of side length 5 cm is placed on a mass balance. What is the density of the cube?

• 1. 1.0 g/cm³

• 1. 0.20 g/cm³

• 1. 5.12 g/cm³

• 1. 4.88 g/cm³

The density of a wood block is 2.7 g/cm³ and a mass of 583.3 g. What is its volume?

• 1. 0.5 cm³

• 1. 21.6 cm³

• 1. 216.0 cm³

• 1. 1574.9 cm³

Water is added to a measuring cylinder containing 100 cm³ of liquid paraffin.
(The density of paraffin is 0.80 g/cm³ and that of the water is 1.0 g/cm³ ).
As the water is added, the paraffin level rises to 150 cm³. The paraffin and water do not mix.
What is the total mass of liquid in the measuring cylinder?

• 130 g

• 140 g

• 167 g

• 175 g

A block of unknown material is shown in the diagram. It's mass is 500 g.
What is the density of the block?

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The masses and volumes of four different objects are given in the table.
Which of the objects has the lowest density?

• Mass: 100 g
  Volume : 100 cm³

• Mass: 150 g
  Volume : 50 cm³

• Mass: 85 g
  Volume : 17 cm³

• Mass: 10 g
  Volume : 20 cm³

A block is shown in the diagram. It has a mass of m.
Which expression below could be used to calculate the density of the block?

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Four blocks, W, X, Y, and Z, are shown below.
Which of the two blocks has the same density?

• W and X

• W and Y

• Y and Z

• W and Z