Bellringer

Do not write the question….

Identify the following as conduction, convection, or radiation.1. Getting your hands warm by a campfire

2. Touching a hot pan from the oven

3. The sun warms the sand on a beach

4. Boiling water to make macaroni

5. Holding a cup of hot coffee in your hand

6. Heating air inside of a hot air balloon

Review

__________ is the ability to cause change.– A. Work– B. Energy– C. Power– D. Velocity

Review

__________ is the energy stored in an object due to its position.– A. light energy– B. kinetic energy– C. potential energy– D. thermal energy

Review

__________ is a form of energy an object has if it is moving.– A. Potential Energy– B. Kinetic Energy– C. Chemical Energy– D. Thermal Energy

Review

If the particles in an object begin to move more quickly, their average kinetic energy __________ and the object's temperature __________ .– A. Increases; rises– B. Increases; drops– C. Decreases; rises– D. Decreases; drops

Review

The transfer of energy that occurs when you touch a hot object and you are burned is called: – A. radiation– B. conduction– C. convection– D. thermal

Review

The transfer of energy that allows you to get warm while sitting next to a fire is called: – A. radiation– B. conduction– C. convection– D. thermal

Review

When energy changes from one form to another, the total amount of energy:– A. increases– B. decreases– C. stays the same– D. depends on the type of energy

Review

Which of the following is NOT a form of energy?– A. Chemical– B. Thermal– C. Kinetic – D. Friction

Review

__________ is a measure of the average kinetic energy of all the particles in an object.– A. thermal– B. temperature– C. density– D. conduction

Review

Heat is the thermal energy that flows from a material with a _____ temperature to one with a _____ temperature.– A. high; low– B. low; high– C. low; low– D. high; high

Review

These currents help your soup to warm evenly over a burner: – A. chemical– B. conduction– C. thermal– D. convection

Study Pack #7

Today’s Goals…

I can explain how energy is involved in chemical reactions.

Page 178

Chemical Reactions

A change in matter that forms a new substance is called a chemical change– The new substance is made of the same

elements as the original substance but in different combinations

Chemical Reactions

A chemical change is a chemical reaction

What are some of the chemical reactions going on around you?

Energy in Chemical Reactions

Every chemical reaction involves a change of energy– Release energy or absorb energy– Recall the signs of a chemical change

Energy in Chemical Reactions

If it releases energy it is called an exothermic reaction– A car engine– Burning oil, coal, gas in your home for heat

Energy in Chemical Reactions

If it absorbs energy it is called an endothermic reaction– Baking cookies

What did you learn?

True or False– A chemical reaction is a chemical change.– New substances can be produced in

chemical reactions. – A chemical reaction that absorbs energy is

called an exothermic reaction.– Baking cookies is an example of an

endothermic reaction.