Energy Transformations

A student uses a toaster oven to cook an after-school snack of pizza. What type of energy transformation does the toaster oven utilize?

• Light energy to electrical energy

• Electrical energy to heat energy

• Heat energy to electrical energy

• Solar energy to electrical energy

Which of the following provides the best definition of energy?

• Energy is the flow of small particles

• Energy is the ability to do work

• Energy is the transfer of work

• Energy is useful only in the form of electrical energy

The Law of Conservation of Energy states that

• Energy is totally lost

• More energy is produced

• Energy changes to matter like chemicals

• Energy changes form, but is not created or destroyed.

A student who is cold briskly rubs her hands on her bare arms. What energy transformation is the student using to feel warmer?

• Mechanical → Thermal

• Light→ Thermal

• Thermal → Chemical

• Electrical → Thermal

People are encouraged to eat breakfast every morning to give their bodies energy. What energy transformation takes place a s a runner eats breakfast and then goes for a long run?

• Chemical→ mechanical → thermal

• Thermal → chemical→ light

• Mechanical→ chemical→ thermal

• Light→ chemical→ electrical

An energy conversion that results in heat would be-

• Electrical engery

• Nuclear energy

• Thermal energy

• Mechanical energy

Which of the following is an example of potential energy?

• Rolling ball

• Child skateboarding

• A car stopped at a red light

• Child jumping rope

Which form of energy increases as an apple falls from a tree?

• Kinetic engergy

• Electric energy

• Thermal energy

• Potential energy

Which of the following is the best example of potential energy?

• Stretched rubber ban

• Ball bouncing

• Baby crawling

• Fish swimming