Year 7 Energy Assessment

Which word describes a resistive force caused by 2 objects in contact

• Friction

• Reaction force

• Upthrust

• Weight

What is the best definition of resultant force?

• Overall force

• The sum of all the forces

• The difference between the forces

• Balanced forces

Which of these are non-contact forces? (2 marks)

• Magnetic force

• Gravity

• Air resistance

• Friction

What do we call the place on an object where the mass is thought to be concentrated?

• Centre of mass

• Pivot

• Epicentre

• Middle point

What words describes a turning force?

• Moment

• Pivot

• Balanced force

• Seesaw

What 2 units can be used for energy? (2 marks)

• Joules(J)

• kilowatt hours (kWh)

• Watts

• Volts

Which of these are types of energy stores? (2 marks)

• chemical

• elastic

• light

• electrical

Which of these are energy stores? (2 marks)

• Magnetic

• Thermal

• Light

• Sound

What is the principle of conservation of energy?

• Energy cannot be created or destroyed

• No energy should be wasted

• All energy is useful

• Energy cannot be lost

What happens to most wasted energy in any energy transfer?

• It warms up the surroundings

• It disappears

• It stops being energy

• Nothing