6. Which type of house insulation has the longest payback time?
Double glazing
Fibreglass roof insulation
Reflective foil on or in walls
Cavity wall insulation
7. Name two electromagnetic waves with a shorter wavelength than visible light.
Radio waves
Infrared rays
Ultra violet/x-rays/gamma rays
Microwaves
8. Deforestation contributes to global warming. True of False?
True - reduces the amount of oxygen in the air and more carbon dioxide stays in the atmosphere rather than being taken away by trees, when they photosynthesise.
False
9. Which type of seismic wave cannot travel through the liquid outer core of the Earth?
Secondary waves
Primary waves
10. What types of molecules in foods absorb microwaves?
Water and fat
Carbon dioxide
Sulfuric acid
11. Name the useful energies produced by a television.
Electrical energy
Light and sound
Heat energy
12. On a thermogram of two objects, one appears blue in colour, and the other one is yellow. Which object is giving out the most heat energy?
