Unit 2: Energy and Energy Resources

Abin is doing work by lifting a bowling ball. Which statement could be made about the energy in this situation? It is being transferred from the ball to his arm muscles. It is being transferred from his arm muscles to the ball. It would be recorded in units of hertz and power. It would be cause a change in energy from potential to chemical.

It is being transferred from his arm muscles to the ball.

Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. Which statement best describes Gabriel's measurements? They will remain constant. They will both be recorded in joules. They will both be recorded in hertz. They will involve compressions.

They will both be recorded in joules.

wave

a disturbance that carries energy from one place to another through matter and space

electromagnetic wave

a type of wave that carries energy through space where there is almost no matter

Work transfers ____between objects

energy

gravitational potential energy

energy of an object because of its height above a surface

mechanical energy

energy of an object because of its potential and kinetic energy

elastic potential energy

energy stored in a compressed or stretched object

chemical energy

found in the bonds between atoms

electrical energy

found in the flow of electrical charges

nuclear energy

found in the nucleus of an atom

thermal energy

found when internal energy is transferred

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying? gravitational potential energy electrical energy chemical energy elastic potential energy

gravitational potential energy

A windmill's blades move from the blowing wind. The movement of the blades represents______energy

kinetic

Which term describes the energy an object has because of its motion? potential nuclear kinetic thermal

kinetic

What is the energy of an object because of its potential and kinetic energies? chemical energy electrical energy nuclear energy mechanical energy

mechanical energy

The sun emits electromagnetic waves at many frequencies, but mostly in the infrared, visible, and ultraviolet spectrums. What kind of energy is this? nuclear radiant thermal chemical

radiant

The visible light that allows people to see where they are going describes________energy

radiant

energy

the ability to do work

kinetic energy:

the energy an object has because due to its motion

radiant energy

the energy associated with electromagnetic waves

electrical energy

the energy due to the flow electrical charges

gravitational potential energy

the energy of an object due to its height above a surface

mechanical energy

the energy of an object due to its potential energy and kinetic energy

elastic potential energy

the energy stored in a compressed or stretched object

chemical potential energy

the energy stored in the bonds of atoms

nuclear energy

the energy stored in the nucleus of an atom

thermal energy

the part of total internal energy that can be transferred

potential energy

the stored energy an object has due to its position

compress

to press in to make more compact

If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done? compression work radiation energy creation

work

internal energy

: the total potential and kinetic energies of the particles in a substance

Which statements describe kinetic and potential energy? Check all that apply. A. Energy can be stored in the position of an object. B. Energy is not present in a moving object. C. Energy can be stored in the position of the particles that make up a substance. D. Energy exists as movement of the particles of a substance. E. Energy is greater in faster-moving particles than in slower-moving particles. F. Energy is lower in objects with greater mass than in objects with less mass.

A. Energy can be stored in the position of an object. C. Energy can be stored in the position of the particles that make up a substance. D. Energy exists as movement of the particles of a substance. E. Energy is greater in faster-moving particles than in slower-moving particles.

A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the same floor at 3 m/s. Which ball has greater kinetic energy, and why? A. The yellow ball has greater kinetic energy, because it is rolling at a higher position above the ground. B. The red ball has greater kinetic energy, because it has a greater mass. C. The yellow ball has greater kinetic energy, because it is rolling at a greater speed. D. The red ball has greater kinetic energy, because it is releasing more thermal energy.

B. The red ball has greater kinetic energy, because it has a greater mass.

Bridget is riding her bicycle up a hill. Which statements are correct? Select five options. Bridget is transferring energy to the bicycle. The bicycle is using energy to do work. Bridget has kinetic energy. The bicycle has potential energy. Bridget has nuclear energy. The bicycle has mechanical energy.

Bridget is transferring energy to the bicycle. The bicycle is using energy to do work. Bridget has kinetic energy. The bicycle has potential energy. The bicycle has mechanical energy.

Which statement best defines energy? Energy is the force applied over a distance. Energy is the ability to do work. Energy is the rate at which work is done. Energy is the motion of objects.

Energy is the ability to do work.

_______causes movement of an object, whereas________is the work done on an object in a given amount of time.

Force Power

When Anna eats an apple, the sugars in that apple are broken down into the substance called glucose. Glucose is then burned in her body for energy. One of the body parts that needs this energy is the heart, which beats due to electrical impulses. A byproduct of this glucose breakdown is the heat that warms her body and is later released. Which identifies the energy transformations that take place in Anna's body as this process takes place? Mechanical energy is converted to kinetic energy, which is then converted to potential energy. Chemical energy is converted to thermal energy and electrical energy. Electrical energy is converted to chemical energy and thermal energy. Mechanical energy is converted to potential energy which is then converted to kinetic energy.

Mechanical energy is converted to kinetic energy, which is then converted to potential energy.

Which statement best describes the work and energy in these examples? Example 1: Running a car requires gas.Example 2: Humans require food to live. The gas and food are examples of energy. The gas and food are examples of work. The gas and humans are examples of work. The food and car are examples of energy.

The gas and food are examples of energy.