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1. The two uses of a concave mirror are Shaving mirrors and vehicle headlights and the two uses of convex mirror are magnifying glass and security purposes.
2. The change in direction of light when it passes from one medium to another medium which is obliquely is called reflection of light. or the blending of light when it goes from one medium to another oblique you is called reflection of light.
3. Electric wire laid in summer because of heat as temperature rises and the molecules of wire loses.
4. The thermometer works on the principle of of Law of Gay-Lussac which State that, at constant volume the Temperature is directly proportion to pressure.
5. The difference between Boilling and evaporation is Evaporation takes place at the surface of liquid at all temperature and the temperature of liquid decreases whereas the temperature of liquid remain same in Boilling and it takes place throughout the water.