2.2.3. Melting, boiling and evaporation
A subsection of Physics, 0625, through 2. Thermal physics
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On a hot day, a child drinks all the water in a plastic bottle. She then screws the cap back tightly on the bottle, so that the bottle contains only air. She throws the bottle into a waste basket, where the Sun shines on it. After a while in the Sun’s rays, the air in the bottle is much hotter than before. State what has happened to the pressure of the air in the bottle. In terms of the behaviour of the air molecules, explain your answer to . cap screwed on tightly air Use Also in the waste basket is a broken glass bottle containing a small quantity of water, as shown in . As the Sun shines on it, the volume of water slowly decreases. State the name of the process causing this decrease. In terms of the effect of the Sun’s rays on the water molecules, explain your answer to . water Examiner's Use
0625_s05_qp_2
THEORY
2005
Paper 2, Variant 0
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