Review Unit 7 and 8

A fan converts ___________ energy into ___________ energy

• Mechanical energy / Electrical energy

• Electrical energy / Mechanical energy

• Electrical energy / Chemical energy

• Thermal energy/ Mechanical energy

A race car speeding down the road has this kind of energy.

• kinetic energy

• sound energy

• thermal energy

• all of these

Cooking bacon in a frying pan is a good example of heat transfer by ____.

• conduction

• convection

• radiation

• thermal

Mechanical Waves have to travel through a medium. What is an example of a medium?

• Air

• Water

• Solid

• All of these

Explain the energy transformation occurring in a battery powered car?

• mechanical energy -> chemical energy

• mechanical energy -> kinetic energy

• chemical energy -> mechanical energy

• kinetic energy -> potential energy

The child is swinging back and forth from point A to point C and back again. At which point does the child on a swing have the greatest potential energy?

• Only at point A since that is where she started.

• Only at point B since she will be going the fastest.

• At point A and C since she will be the highest.

• She will have the same at all points since energy cannot be destroyed.

Warm water rising in a pot while the cooler falls to the bottom is an example of ____.

• conduction

• convection

• radiation

• thermal

How are Transverse and Longitudinal waves different?

• Transverse wave- particles move parallel to wave energy. Longitudinal wave- particles move perpendicular to wave energy.

• Transverse wave- particles move perpendicular to wave energy. Longitudinal wave- particles move parallel to wave energy.

• Only Longitudinal waves are mechanical waves

• Only Transverse waves require a medium

Which is a good example of the law of conservation of energy?

• A. Potential energy changing to kinetic energy as a leaf falls to out of a tree and onto the ground.

• B. Electrical energy being transformed into heat and light in a light bulb.

• C. Energy being created or destroyed.

• Only A and B

____________ energy increases with velocity; ___________ energy increases with height.

• kinetic / potential

• potential / kinetic

• potential / potential

• kinetic / kinetic