2022 Year 8 Physics Diagnostic

What is the unit for force?

• Kilojoules

• Newtons

• Joules

• Metres

What is the unit for energy?

• Kilojoules

• Newtons

• Joules

• Metres

What is the best description for gravitational potential energy?

• The energy an object has when held above the surface of the earth

• The value of acceleration due to the gravity

• The rate of change of distance with time

• The energy a twisted elastic band has

What is the electromagnetic spectrum?

• The waves

• The range of electromagnetic frequencies and wavelengths of sound

• The range of electromagnetic frequencies and wavelengths of light

• The vibrating particles

Why does double glazing a house reduce the heating and/or cooling costs?

• It reduces the amount of heat lost through convection

• It increases the amount of heat lost through convection

• It increases the amount of heat lost through conduction and radiation

• It reduces the amount of heat that is lost or enters through conduction and radiation

What are the three methods of heat transfer?

• Conduction, concentration, radiation

• Conduction, convection, radiation

• Conduction, convection, rancidation

• Contraption, convection, radiation

What is visible light?

• The portion of the electromagnetic spectrum that is visible to the human eye between 200 nm and 810 nm wavelengths.

• The portion of the electromagnetic spectrum that is not visible to the human eye between 490 nm and 710 nm wavelengths.

• The portion of the electromagnetic spectrum that is visible to the human eye between 490 nm and 710 nm wavelengths.

• The portion of the electromagnetic spectrum that is not visible to the human eye between 200 nm and 810 nm wavelengths.

Select the response that is correct about potential/stored energy.

• Can have forms of; chemical, elastic and gravitational

• Is measured in grams

• Involves kinetic and nuclear energy

• Cannot be influenced by gravity

Select the correct statement about Kinetic Energy

• Kinetic energy is the energy of motion and is measured in Joules

• Kinetic energy is potential energy

• Kinetic energy is the energy of motion and is measured in Newtons

• A stationary object

What is the Law of Conservation of Energy?

• The total amount of energy remains constant in a system. Energy can neither be created nor destroyed.

• The total amount of energy changes in a system and some is permanently lost to the atmosphere.

• The total amount of energy in a system is always 100 Joules

• The total amount of energy remains constant in a system. Energy can neither be created nor destroyed, but can be changed from one form to another.