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Description
Flashcards by afiq abdillah, updated more than 1 year ago
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Created by afiq abdillah
about 8 years ago
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| Question | Answer |
| What is the Sun powered by? | It is powered by nuclear fusion. |
| How do nuclear fusion form? | They form when hydrogen nuclei combine at extreme temperatures and produces helium nuclei and large amounts of energy. |
| How much energy is produced by the sun and how does it compare to us? | The sun produces 63 million watts per square meter of its surface which equals to 3.78e+26. In comparison, the human race have used up about 15 thousand billion watts. This is about one ten-trillionth of the Sun's energy output. |
| What is the percentage of energy that makes it to earth? | Approx. 40% |
| What does the energy from the sun heat? | It heats the atmosphere, water and land at the surface. |
| What is the solar energy that enters the Earth's atmosphere? | They are electromagnetic radiation that has a really wide range and differing wavelengths. |
| Why is the sky blue? | The molecules in the air absorbs blue light. The molecules then scatter blue light in all directions allowing us to see it. |
| What are greenhouse gases? | They are gases that absorbs lower-energy. Some examples include carbon dioxide, methane and water vapour. |
| Why is it important that we have to keep the Earth's energy levels same? | It is because if we lose energy, the Earth will start cooling. On the other hand, if we gain more energy, the Earth will start heating. |
| Where does most of the energy on earth end up? | They are usually radiated back into space and lost from earth. |
| Is climate change real? | |
| How can volcanoes affect the climate? | They can affect the climate by releasing large amounts of CO2. |
| Why do you wear sunglasses when snow-skiing? | This is because the snow reflects so much sunlight (nearly 90%) |
| What is the ozone layer? | It is a thin layer high in the atmosphere that absorbs ultraviolet radiation. |
| What is the greenhouse effect? | It is an effect where absorption of electromagnetic radiation by gases occur; thus warming Earth. |
| What is the enhanced greenhouse effect? | Effect of increase in greenhouse gas concentration. |
| What is a contrail? | The long thin clouds created by the exhaust gases of high -flying jet aircraft. |
| What is CFC? | It is a chemical that is used in refrigeration that damages the ozone layer. It has now been banned. |
| What would happen if there was no ozone layer. | The ultraviolet light will reach the Earth's surface, causing increased rates of skin. |
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