Cambridge Secondary (7-9). Stage 9. Science. Learner's Book - Unit 3: Forces and energy

Work in groups to discuss: What is the scientific meaning of the word volume?

Which of these has a larger volume?

Which of these has a larger mass?

Look at the densities of these materials: pine wood 0.41 g/cm³; polycarbonate 1.2 g/cm³; polythene 0.95 g/cm³; water 1.0 g/cm³. Which of these materials has the lowest density?

Look at the densities of these materials: pine wood 0.41 g/cm³; polycarbonate 1.2 g/cm³; polythene 0.95 g/cm³; water 1.0 g/cm³. Which of these materials will sink in water?

Look at the densities of these materials: pine wood 0.41 g/cm³; polycarbonate 1.2 g/cm³; polythene 0.95 g/cm³; water 1.0 g/cm³. Explain why the material will sink in water.

Copy and complete the equation for density. Density = …

A block of aluminium has a volume of 5.0 cm³ and a mass of 13.5 g. Calculate the density of the aluminium. Give your answer in g/cm³.

A block of aluminium has a volume of 5.0 cm³ and a mass of 13.5 g. Explain whether the block of aluminium will float or sink in water.

The diagram shows a block of wood. Calculate the volume of the block of wood. Give your answer in cm³.

The block of wood in the diagram has a mass of 54 g. Calculate the density of the wood. Give your answer in g/cm³.

The block of wood in the diagram has a mass of 54 g. Explain whether the block of wood will float or sink in water.

Sea water is placed in a tank. The volume of the sea water is 10 m³. The mass of the sea water is 10 300 kg. Calculate the density of the sea water. Give your answer in kg/m³.

Sea water has mass 10 300 kg in 10 m³. Pure water has a density of 1000 kg/m³. Explain what will happen to a block of material with a density of 1020 kg/m³ when placed into sea water.

Sea water has mass 10 300 kg in 10 m³. Pure water has a density of 1000 kg/m³. Explain what will happen to a block of material with a density of 1020 kg/m³ when placed into pure water.

Copper has a density of 8.96 g/cm³. Calculate the mass of copper that has a volume of 20 cm³.

Copper has a density of 8.96 g/cm³. Calculate the volume of copper that has a mass of 4.5 g.

A toy car is placed into a measuring cylinder of water as shown in the diagram. Use the diagram to calculate the volume of the toy car.

The toy car in the diagram has a mass of 84 g. Calculate the density of the toy car. Give your answer in g/cm³.

The toy car in the diagram is made from steel and plastic. Its mass is 84 g and its displaced volume is 28 cm³. Steel has a density of 7.8 g/cm³. Suggest two reasons for the difference between this value and the density you calculated in part b.