2024 Milestone Review

Which of the following is the best example of the energy conversion from chemical to light energy? (AKS, 7a, DOK 1)

• an electric stove

• a wood-burning fire

• a lamp plugged into an outlet

• a lightbulb inside a microwave

What do a coal-burning power plant, a nuclear plant, and a hydroelectric dam all have in common? (AKS 7a, DOK 2)

• They all convert electrical energy into kinetic energy.

• They all convert potential energy into electrical energy.

• They all convert kinetic energy into potential energy.

• They all convert electrical energy into mechanical energy.

Which of the following pairs best classifies energy types according to their characteristics? (AKS 7a, DOK 2)

• light - potential; sound - kinetic

• chemical - potential; sound - kinetic

• nuclear - potential; chemical - kinetic

• thermal - potential; electrical - kinetic

Jacob is riding his bike down a tall hill. At the top of the hill, he has 2800J of potential energy. At the bottom of the hill, when he is going the fastest, his kinetic energy measures 2650J. Which statement below is true? (AKS 7b, DOK 2)

• The amount of energy at the bottom of the hill cannot equal the amount at the top, because some of the energy is destroyed.

• The amount of energy at the bottom of the hill cannot equal the amount at the top, because some of the energy is gained.

• The amount of energy at the bottom is equal to the amount at the top, but he gained some energy as he traveled due to a higher speed.

• The amount of energy at the bottom is equal to the amount at the top, but some energy was converted into other forms due to friction.

Lawson builds a circuit which connects wires to a battery and to a light bulb. Which energy transformation does this circuit represent? (AKS 7a, DOK 2)

• Light and thermal energy produces electrical energy.

• Chemical energy produces electrical energy which produces light energy only.

• Electrical energy produces chemical energy which produces light and thermal energy.

• Chemical energy produces electrical energy which produces light and thermal energy.

Benny and Smalls both hit baseballs. Benny’s ball travels twice as fast. How does the kinetic energy of the two baseballs compare? (AKS 7b, DOK 2)

• Benny’s baseball has 4 times the kinetic energy, because it travels twice the speed.

• Smalls’ baseball has twice as much kinetic energy, because it travels half the speed.

• Benny’s baseball has twice as much kinetic energy, because it travels twice the speed.

• Both baseballs have the same amount of kinetic energy, because they have the same mass.

Which set of energy values for the roller coaster below makes the most sense according to the Law of Conservation of Energy? (AKS 7b, DOK 2)

• At point A all of the energy is potential. At point C all of the energy is kinetic. At point B, there is slightly more potential energy than kinetic energy.

• At point A all of the energy is potential. At point C all of the energy is kinetic. At point B, there is slightly more kinetic energy than potential energy.

• At point A all of the energy is kinetic. At point C all of the energy is potential. At point B, there is slightly more kinetic energy than potential energy.

• At point A all of the energy is kinetic. At point C all of the energy is potential. At point B, there is slightly more potential energy than kinetic energy.

Which statement is true concerning the requirements for the different types of heat transfer? (AKS 7c, DOK 1)

• Convection requires direct contact between the two substances. Radiation and conduction do not require contact.

• Convection and conduction require direct contact between the two substances. Radiation does not require contact.

• Convection and conduction require particles to interact during heat transfer. Radiation does not require particles and can occur through empty space.

• Convection and radiation require particles to interact during heat transfer. Conduction does not require particles and can occur through empty space.

Which method of heat transfer is shown in the diagram above as the bar is heated? (7e, DOK 3)

• convection

• conduction

• radiation

• thermal expansion

During an investigation of heat transfer, students observed a metal bar being heated by a flame. Thermometers were placed at three locations along the bar as shown in the diagram above. What will happen to the molecules of the liquid inside the thermometer on the right as the bar continues to be heated by the flame? (7c, DOK 1)

• The molecules will move faster and spread out as they gain energy due to convection.

• The molecules will move faster and get bigger as they gain energy due to conduction.

• The molecules will move faster and spread out as they gain energy due to conduction.

• The molecules will move faster and get bigger as they gain energy due to convection.