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Fill in the Chart . Think About It. What happens to a puddle of water on a sunny day? What happens to ice on a warm day? What happens to a pond in very cold temperatures?. Changes of States. Changes between Solids & Liquids. Melting : change in state from a solid t o a liquid
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Think About It • What happens to a puddle of water on a sunny day? • What happens to ice on a warm day? • What happens to a pond in very cold temperatures?
Changes between Solids & Liquids Melting: change in state from a solid to a liquid • Melting occurs at a specific temperature called, melting point • A change from a solid to a liquid involves an increase in thermal energy
Changes between Solids & Liquids Freezing is the change of state from liquid to a solid • A change from a liquid to a solid is a decrease in thermal energy
Changes between Liquid & Gas Vaporization takes place when the particles in a liquid gain enough energy to form a gas. • Vaporization that only occurs on the surface is called evaporation • Example: Shrinking puddle
Changes between Liquid & Gas Vaporization takes place when the particles in a liquid gain enough energy to form a gas. • Boiling: from a liquid to a gas below its surface and at the surface • Boiling point: temperature at which a liquid boils
Changes between Liquid & Gas The opposite of vaporization is called condensation. • Condensation occurs when particles in a gas lose thermal energy to form a liquid
Changes between Solid & Gas • Sublimation, particles of a solid that go directly to a gas