13.5 STS Introduction to Energy Notes

What is energy?

• The ability to create matter

• The ability to do work, which means the ability to create change

• The ability to destroy matter

• The ability to stop motion

Which of the following is an example of potential energy?

• A roller coaster rolling downhill

• A burning log on the fire

• A roller coaster at the top of a hill

• A car moving on the highway

What does the Law of Conservation of Energy state?

• Energy can be created and destroyed

• Energy can be created but not destroyed

• Energy cannot be created or destroyed, only transferred

• Energy can be destroyed but not created

Which of the following is a chemical change?

• Melting ice

• Chopping wood

• Baking cookies

• Boiling water

What is kinetic energy?

• Energy stored in a substance or object

• Energy of motion

• Energy that cannot be transferred

• Energy that is always potential

Which of the following is a physical change?

• Burning wood

• Rusting iron

• Freezing water

• Cooking an egg

What is the average amount of electricity used by an American at home per year?

• 5,000 kilowatt hours

• 11,000 kilowatt hours

• 15,000 kilowatt hours

• 20,000 kilowatt hours

What is the main product of a combustion reaction involving hydrocarbons?

• Oxygen

• Hydrogen

• Carbon dioxide and water

• Methane

Which of the following is an example of a chemical reaction?

• Melting ice

• Evaporating water

• Combustion of gasoline

• Dissolving sugar in water

What happens to energy during a physical change?

• It is destroyed

• It is created

• It is transferred

• It remains constant