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| Question | Answer |
| What is the sun powered by? | The Sun is powered by nuclear fusion. |
| How does hydrogen nuclei produce helium nuclei and large amounts of energy? | They combine together at extreme temperatures and pressures. |
| What is the total amount of energy released by the sun? | 63 million watts per square metre of it's surface. |
| W | The total energy used by all human activities on Earth is about 15 thousand billion watts which is about one ten-trillionth of the Sun's energy output. |
| From the solar energy reaching the Earth's surface, about how much of it makes it down to the Earth's surface? | Only about 40% makes it down to the Earth's surface. |
| What is the solar energy that enters the Earth's atmosphere called? | Electromagnetic radiation. |
| What is an electromagnetic spectrum? | An electromagnetic spectrum is a range of different forms of light and other energy carrying waves. |
| What is the ozone layer? | The ozone layer is a thin layer high in the atmosphere that absorbs ultraviolet radiation. |
| What would happen if the ozone layer did not absorb ultraviolet radiation? | Without the ozone layer the ultraviolet light would reach the Earth's surface, increasing sunburn and rates of skin cancer. |
| What are some examples of high energy forms of electromagnetic radiation? | Gamma rays and X-rays. |
| What can these forms of electromagnetic radiation do? | These forms of electromagnetic radiation could damage cells in living organisms. |
| What is chlorofluorocarbon? | Chlorofluorocarbon is a chemical used in refrigeration, greenhouse gas, damaged ozone layer. |
| What are greenhouse gases? | Greenhouse gases are gases in the atmosphere that absorb electromagnetic radiation. |
| What are some examples of greenhouse gases? | Some examples of greenhouse gases include: -Water vapour -Methane -Carbon dioxide |
| What do infrared waves do? | Infrared waves carry heat energy. |
| How does Earth remain balanced? | A balance occurs when as much energy radiates out into space as the Earth receives from the Sun. |
| What is contrail? | Contrail is the long thin clouds created by the exhaust gases of high-flying jet aircraft. |
| What would happen if less energy was lost than gained? | The Earth would slowly heat up. |
| What is an enhanced greenhouse effect? | An enhanced greenhouse effect is an effect of increase in the greenhouse gas concentration. |
| What is a greenhouse effect? | Greenhouse effect is absorption of electromagnetic radiation by gases in the atmosphere warming Earth. |
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