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P2 Radiation & Life

P2 Radiation & Life. Lesson 7: Greenhouse Effect. Objectives. MUST understand what the greenhouse effect is and its causes SHOULD understand that scientists need good evidence to be sure that a factor causes an outcome. Key Words. You need to be able to define the following: Atmosphere

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P2 Radiation & Life

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  1. P2 Radiation & Life Lesson 7: Greenhouse Effect

  2. Objectives • MUSTunderstand what the greenhouse effect is and its causes • SHOULD understand that scientists need good evidence to be sure that a factor causes an outcome

  3. Key Words • You need to be able to define the following: • Atmosphere • Greenhouse effect • Principal frequency • Methane

  4. Textbook Answers 1) The Earth’s atmosphere absorbs infrared radiation from the Earth and warms up; it re-radiates infrared and warms up the Earth. 2) a) The atmosphere reflects some radiation from the Sun back into space, reducing the amount reaching Earth. b) The atmosphere absorbs radiation from the Earth and re-radiates it back to Earth, and also reflects some radiation from Earth back to Earth, reducing the amount of radiation leaving Earth. 3) Ice cube; it is coldest. 4) Less 5) Depends on cloud cover, pressure and temperature. 6) The growth of people does not cause the number of exams they take (nor the other way round). However, they are linked because teenagers normally have a growth spurt and also take GCSEs, A-levels and other exams.

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