Expansion and contraction

• cid_basic
• Upper Primary
• Science
• VII. Changing Materials
• 42. Physical changes in materials

energy, water, condensation, particle, heat, contraction, gas, liquid, water vapour, mercury, thermostat, expansion, melting, glass, contact, bond, energy transfer, heat energy, Changes of state, rain, thermal expansion, wire, Bimetallic strip, melting glass, thermostats, bimetal, Expansion and contraction