1. The diagram shows an energy balance climate model for a planet. incoming intensity I reflected from atmosphere 0.25I reflected by planet surface 0.15I 4 radiated by planet surface 0.60I atmosphere planet surface The intensities of the reflected and radiated radiation are given in terms of the incident intensity I. Which of the following is the albedo of this planet? A. 0.15 B. 0.25 C. 0.40 D. 0.60 2. In which of the following places will the albedo be greatest? A. A forest B. A grassland C. An ocean D. A polar ice cap (Total 1 mark) (Total 1 mark) IB Questionbank Physics 1
3. The albedo for the oceans is lower than that for glaciers. This is because, compared to ice, sea water A. has a greater density. B. has a greater specific heat capacity. C. has a greater coefficient of volume expansion. D. absorbs a greater amount of radiative power. (Total 1 mark) 4. The diagram below shows a simplified model of the energy balance for Earth. incident intensity 340 Wm-2 reflected intensity 100Wm- + radiated intensity 240 Wm-2 atmosphere re-radiated intensity 2Wm-2 Earth surface The albedo of the Earth according to this model is equal to A. 2 . 340 100 B. . 340 238 C. . 340 240 D. 340 (Total 1 mark) IB Questionbank Physics 2
6. Greenhouse gases A. reflect infrared radiation but absorb ultraviolet radiation. B. reflect ultraviolet radiation but absorb infrared radiation. C. transmit infrared radiation but absorb ultraviolet radiation. D. transmit ultraviolet radiation but absorb infrared radiation. (Total 1 mark) 7. What is the phenomenon that best explains why greenhouse gases absorb infrared radiation? A. Resonance B. Interference C. Refraction D. Diffraction (Total 1 mark) 8. Which of the following describes the role of the atmosphere in the greenhouse effect? A. The atmosphere is transparent to all solar radiation. B. The atmosphere absorbs infrared radiation from the ground. C. The atmosphere scatters red light more than blue light. D. Clouds in the atmosphere prevent absorption of infrared radiation. (Total 1 mark) IB Questionbank Physics 3