Answers FL-2002070-MJ Comprehensive Science 2Energy Transformations

Energy Transformations Answers

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Taro stated that when someone hits a golf ball with a club, the amount of energy the ball has changes, the amount of energy that the club has changes, and the total energy of the system that includes the ball and the club increases. Which best explains Taro’s error?

The amount of energy that the ball has does not change.

The amount of energy that the club has does not change.

The total energy of the system remains the same.

The total energy of the system decreases.

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The image shows a dam.

X: kinetic energyY: potential energy

X: potential energyY: kinetic energy

X: mechanical energyY: electrical energy

X: electrical energyY: mechanical energy

Savion listed the steps involved when nuclear power plants generate electricity. Nuclear reaction occurs. Nuclear energy is converted to radiant and thermal energy. Heat is used to generate steam. Light and heat are released. Steam turns turbines. Mechanical energy is converted to electrical energy.

In step 2, change “radiant and thermal ” to “chemical and mechanical.”

Reorder the steps so that step 4 appears before step 3.

Reorder the steps so that step 6 appears before step 5.

In step 6, change “mechanical” to “thermal.”

Wood has chemical energy, which can be used to generate thermal and radiant energy when burned in a fireplace. Which best explains what happens to the total amount of energy in this scenario?

The total energy in the system increases because chemical energy creates thermal and radiant energy.

The total energy in the system decreases because chemical energy disappears as thermal and radiant energy are generated.

The total energy in the system remains the same as the decrease in chemical energy equals the increase in thermal and radiant energy.

The total energy in the system remains the same as the increase in chemical energy equals the decrease in thermal and radiant energy.

The diagram shows a swinging pendulum.

The pendulum will slow down and eventually stop moving as the mechanical energy transforms to thermal energy.

The pendulum will slow down and eventually stop moving as the mechanical energy disappears.

The pendulum will continue moving at the same speed because mechanical energy is created as the pendulum moves.

The pendulum will slow down but will not stop moving because some of the mechanical energy is destroyed.

What are the two main types of energy?

radiant and chemical

thermal and radiant

potential and chemical

kinetic and potential

Energy can be transformed from one form to another. The diagram shows one such process.

nuclear to thermal and radiant

nuclear to electrical and chemical

chemical to nuclear and radiant

chemical to electrical and nuclear

During nuclear fission and fusion, what is matter that seems to disappear actually converted into?

mass

energy

volume

nuclei

Eddie and Val observed the picture of an athlete running in a race.

Only Eddie is correct because the picture does not show a transformation that starts with chemical energy.

Only Eddie is correct because the picture does not show a transformation that ends with mechanical energy.

Both Eddie and Val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy.

Both Eddie and Val are correct because chemical energy is a type of kinetic energy and mechanical energy includes potential energy.

The human body stores chemical energy from digested food. Some of the chemical energy is converted into mechanical energy when the body moves. Which statement is best supported by this information?

The body does not convert chemical energy to thermal energy.

The body does not convert chemical energy to kinetic energy.

Digested food is a source of potential energy.

Digested food is a form of radiant energy.

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