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Published byJayson White Modified over 9 years ago
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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
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Review __________ is the ability to cause change. –A. Work –B. Energy –C. Power –D. Velocity
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Review __________ is the energy stored in an object due to its position. –A. light energy –B. kinetic energy –C. potential energy –D. thermal energy
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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
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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
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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
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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
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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
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Review Which of the following is NOT a form of energy? –A. Chemical –B. Thermal –C. Kinetic –D. Friction
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Review __________ is a measure of the average kinetic energy of all the particles in an object. –A. thermal –B. temperature –C. density –D. conduction
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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
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Review These currents help your soup to warm evenly over a burner: –A. chemical –B. conduction –C. thermal –D. convection
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Study Pack #7
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Today’s Goals… I can explain how energy is involved in chemical reactions. Page 178
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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
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Chemical Reactions A chemical change is a chemical reaction What are some of the chemical reactions going on around you?
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Energy in Chemical Reactions Every chemical reaction involves a change of energy –Release energy or absorb energy –Recall the signs of a chemical change
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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
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Energy in Chemical Reactions If it absorbs energy it is called an endothermic reaction –Baking cookies
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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.
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