Explain your answer in your science journal. Bellringer Predict what changes would occur if you added an equal number of ice cubes to a glass of cold water and a glass of warm water. Explain your answer in your science journal.

And how they relate to heat. States of matter And how they relate to heat.

Objectives Identify three states of matter. Explain how heat affects matter during a change of state. Describe how heat affects matter during a chemical change. Explain what a calorimeter is used for.

States of Matter The states of matter are the physical forms in which a substance can exist. Remember- Matter is anything that has mass and takes up space. Matter consists of particles that can move around at different speeds. The state a substance is in depends on the speed of its particles (kinetic energy), the attraction between them (potential energy), and the pressure around them. Three familiar states of matter are solid, liquid, and gas.

Properties of Matter How It Looks (Shiny ,Dull, Color, etc.) How It Feels (Hard, Soft, Rough , Smooth, etc.) How It Smells (Sweet, Sharp, Terrible, No Smell, etc.) How It Sounds (Loud, Soft, Echo, No Sound, etc.) What It Does (Bounce, Stretch, Tear, Break, Magnetism etc.)

Solid, Liquid, Gas A solid is matter that has definite size and shape. A liquid takes the shape of the container it is in. Gas is matter that has no definite shape. Gases take the shape of whatever container they are in .

Objectives Identify three states of matter. Explain how heat affects matter during a change of state. Describe how heat affects matter during a chemical change. Explain what a calorimeter is used for.

Changes of State-a physical change A change of state is a change of a substance from one state of matter to another. A change of state is a physical change that affects one or more physical properties of a substance without changing the identity of the substance. Changes of state include freezing (liquid to solid), melting (solid to liquid), boiling (liquid to gas), and condensing (gas to liquid).

Changes of state The temperature of the ice remains the same until all of the ice has become liquid water. The water's temperature stays at 100°C as long as there is liquid water present.

Other Physical Changes Breaking Crushing Cutting Bending Melting Freezing Boiling Can happen naturally People can cause changes People cause change Recycling paper Recycling metal

Chemical Properties and Changes Chemical changes change the chemical nature and properties of substances to form new substances A match burns Two substances mix together turn a color different from either of them Toasting marshmallows Melt it—physical change Burn it—chemical change

To form a new substance, old bonds need to be broken before new ones can be made. Sometimes this requires thermal energy to be applied. Sometimes this releases thermal energy.

Objectives Identify three states of matter. Explain how heat affects matter during a change of state. Describe how heat affects matter during a chemical change. Explain what a calorimeter is used for.

The energy is released in chemical reactions. Section 3 Matter and Heat Heat and Chemical Changes, continued Food and Chemical Energy Food contains substances from which your body gets energy. Energy that your body can use is released when chemical compounds such as carbohydrates are broken down in your body. The energy is released in chemical reactions.

Heat and Chemical Changes, continued Calorimeters A calorimeter is a device that measures heat. When one object transfers thermal energy to another object, the energy lost by one object is gained by the other object.

Brain pop!

Objectives Identify three states of matter. Explain how heat affects matter during a change of state. Describe how heat affects matter during a chemical change. Explain what a calorimeter is used for.