15866532
Descrição
FlashCards por Farha Idrees, atualizado more than 1 year ago
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Criado por Farha Idrees
mais de 5 anos atrás
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| Questão | Responda |
| What is infrared radiation? | thermal radiation emitted by the Sun |
| all objects emit... | ... and absorb infrared radiation. |
| How does infrared radiation depend on the temperature of an object? | the hotter an object, the more infrared radiation it emits in a given time |
| What is blackbody radiation? | a perfect black body is an object that absorbs all the radiation that hits it |
| Does an object's temp increase or decrease as it absorbs radiation faster than it absorbs it? | the object's temperature will increase |
| Why do rescue teams use light-coloured, shiny blankets to keep survivors warm? | it emits a lot less radiation than a dark, matt surface, keeping the patient more warm |
| What does the Earth's temperature depend on? | • the absorption of infrared radiation emitted from the Sun • the emission of radiation from the Earth's surface |
| How does the build-up of gases in the atmosphere lead to global warming? | these gases absorb the radiation and then emit it back to the surface, which makes Earth a lot warmer than it would be it these gases were not in the atmosphere |
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