O(n) the effect’, in terms ‘greenhouse Greenhouse gas simulation (PhET, of: University of Colorado) (i) solar energy reaching Earth mainly This simulation demonstrates how the as visible and UV absorption and re-emission of infra-red (ii) absorbing some of this energy, photons from the earth’s surface affects heating up and radiating IR the temperature of the atmosphere. (iii) greenhouse gases (e.g. carbon Learners can directly alter the dioxide and methane) in the composition of the atmosphere, troposphere absorbing some of this IR, determine the effect of clouds and also in the window’ ‘IR investigate the composition of the air (iv) absorption of IR by greenhouse during the last ice age, before the gas molecules increases the vibrational industrial revolution and in the present energy of their bonds, the energy is day. transferred to other molecules by collisions, thus increasing their kinetic energy and raising the temperature THINKING CONTEXTUALLY (v) greenhouse gas molecules also some of the absorbed IR in all directions, some of which heats up the Earth (vi) increased concentrations of greenhouse gases leading to an enhanced greenhouse effect.
O(n) the ‘greenhouse effect’, in terms of: (i) solar energy reaching Earth mainly as visible and UV (ii) absorbing some of this energy, heating up and radiating IR (iii) greenhouse gases (e.g. carbon dioxide and methane) in the troposphere absorbing some of this IR, in the ‘IR window’ (iv) absorption of IR by greenhouse gas molecules increases the vibrational energy of their bonds, the energy is transferred to other molecules by collisions, thus increasing their kinetic energy and raising the temperature (v) greenhouse gas molecules also some of the absorbed IR in all directions, some of which heats up the Earth (vi) increased concentrations of greenhouse gases leading to an enhanced greenhouse effect. Greenhouse gas simulation (PhET, University of Colorado) This simulation demonstrates how the absorption and re-emission of infra-red photons from the earth’s surface affects the temperature of the atmosphere. Learners can directly alter the composition of the atmosphere, determine the effect of clouds and also investigate the composition of the air during the last ice age, before the industrial revolution and in the present day. THINKING CONTEXTUALLY
Chemistry%20B%20Resources%2011-11-16.docx