Matter Lesson 6

What is matter? Anything that takes up space and has mass.

Matter has many forms Mass is a measure of the quantity of an object. (g, kg,) Volume is a measure of space taken up (mL, L)

The Particle Theory of Matter (4 points) Way of describing matter. All matter is composed of very tiny objects called particles. Each Pure substance has its own kind of particles, different from the particles of other pure substances.

The Particle Theory of Matter (4 points) 3. Particles present in matter are always in motion. They may be vibrating back and forth, as in a solid, or moving in all directions, as in a gas. In a liquid, particles stay close together but can slide past one another. 4. The particles in a substance attract each other. The amount of attraction is different for different kinds of particles. All particles have spaces between them.

Changes of State There are 3 states of matter Solid Liquid gas

Terms for changes of state Melting – Change from a solid to a liquid Evaporation - Change from a liquid to a gas Condensation - Change from a gas to a liquid Freezing - Change from a liquid to a solid Sublimation - Change from a solid to a gas Deposition - Change from a gas to a solid Ended here

Terms for changes of state

The temperature at which a solid turns into a liquid is called the melting point. (water is 0°C) The reverse process, freezing, occurs at the freezing point.

the temperature at which a liquid turns to a gas is called the boiling point. The boiling point is the same temperature as the condensing point, the temperature at which a gas changes into a liquid

States of Matter Solid State Heating Liquid State Gas State Cooling

States Of Matter Solid -A solid has a fixed shape -A solid has a fixed volume Liquid -The shape of a liquid changes with the shape of its container -A volume has a fixed volume Gas -The shape of the gas changes with the shape of its container -The volume of a gas expands to fill the container

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