Quick Quiz 8 I Heat transfer

What are the units for measuring heat energy?

• newtons

• degrees Celsius

• joules

• degrees Fahrenheit

How does heat energy travel from the Sun to the Earth?

• by radiation

• by conduction

• by convection

• by radiation and conduction

What happens to a fluid when it is heated?

• The particles get bigger.

• The particles get smaller.

• The particles move around more and take up more space.

• The fluid gets denser.

Which of these materials is a good conductor of heat?

• copper

• air

• water

• glass

Why do solids expand when they are heated?

• The particles get bigger.

• The particles vibrate more and take up more space.

• The particles vibrate more and get closer together.

• The particles stick together.

Which substances can heat travel through by convection?

• solids and liquids

• solids and gases

• only liquids

• liquids and gases

Which material would reflect infrared radiation the best?

• white and dull

• black and shiny

• white and shiny

• grey and dull

Jo heats a beaker of water and draws a graph to show how its temperature changes. Which sentence explains the shape of the graph at point X?

• The particles in the solid are breaking apart and absorbing energy.

• The liquid is giving out the energy needed to break the bonds between particles.

• The energy is breaking the bonds between the particles in the gas instead of making the gas hotter.

• The energy is breaking the bonds between the particles in the liquid instead of making the liquid hotter.

Infrared radiation can travel through:

• transparent objects only.

• opaque objects only.

• empty space only.

• empty space and transparent objects.

Solids are better heat conductors than liquids or gases because:

• the particles are closer together in gases.

• the particles are closer together in liquids.

• the particles are closer together in solids.

• the particles in a solid cannot move.