Q3W4 SCIENCE NATURE OF HEAT

What is heat?

• A type of force

• A form of energy

• A chemical reaction

• A type of matter

What happens to molecules when they gain energy?

• They move slower

• They stop moving

• They move faster

• They change shape

Which method of heat transfer requires physical contact between objects?

• Radiation

• Convection

• Conduction

• Insulation

What are materials that transfer heat easily called?

• Insulators

• Conductors

• Radiators

• Emitters

Which of the following is an example of an insulator?

• Metal saucepan

• Woolen scarf

• Glass bottle

• Copper wire

What is the primary medium for convection?

• Solids

• Fluids (liquids or gases)

• Metals

• Vacuum

What kind of energy is radiation?

• Mechanical waves

• Kinetic energy

• Electromagnetic waves

• Sound waves

Why does wearing white or light-coloured clothes during summer help?

• They absorb heat

• They reflect heat

• They trap air

• They reduce sweating

What gases trap heat in the Earth's atmosphere?

• Greenhouse gases

• Noble gases

• Heavy gases

• Combustion gases

What does temperature measure?

• The size of an object

• The speed of molecules

• The weight of an object

• The type of material