Science Chapter 6. 6-5 Essential Question: What are some was you can describe matter?

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Presentation transcript:

Science Chapter 6

6-5 Essential Question: What are some was you can describe matter?

6-5 Changes State Explain how water and other substances change from one state to another (including melting, freezing, condensing, boiling, and evaporating).

What happens when matter is heated? Changing from a solid to a liquid – Melt: to change from a solid to a liquid – Different kinds of matter melts at different temperatures. – Ice melts at 32 degrees F – Rocks melt at over 1,100 degrees F

What happens when matter is heated? When a solid is heated and gains energy, its particles begin to move away from each other. They flow around each other and are no longer held tightly together. This causes the solid to lose its shape. It becomes a liquid.

What happens when matter is heated? Changing from a liquid to a gas – Boil: to change from liquid to a gas – If you heat a liquid to a high enough temperature it will boil. – Energy from heat causes the particles in a liquid to move faster and they spread apart.

What happens when matter is heated? Evaporate: liquid that changes into a gas When wet clothes placed in the sun, the water in the clothes evaporates. The sun heats water droplets in the clothes. The water turns into a gas and your clothes dry.

What happens when matter is cooled? Changing from a Gas to a Liquid – Condense: to change from a gas to a liquid. – Water vapor in the air touches cool objects and loses energy. – Particles of water vapor come closer together. – They change into drops of water.

What happens when matter is cooled? Changing from a liquid to a solid – Freeze: to change a liquid to a solid. – Particles in the liquid lose energy and move slower and closer together. – They get locked into position and form a solid.

How is water different from other kinds of matter? Most kinds of matter shrink as they freeze. Their particles get packed more closely together. When water freezes, its particles rearrange themselves. They make a special pattern. Empty spaces form between the particles. This is why the water expands.

States of Matter