Answers FL-2002040-MJ Comprehensive Science 1 A-CRUnit Test

Unit Test — Unit test Answers

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Let's consider a scenario of a roller coaster ride. As the roller coaster at the top begins to descend, it loses height, which means its potential energy decreases and kinetic energy starts increasing and reaches its maximum value.By using the above scenario, which statement best compares potential and kinetic energy?

Objects always have more potential energy than kinetic energy.

Kinetic energy increases and potential energy decreases when the velocity of an object increases.

Only potential energy decreases when an object’s height increases.

Objects always have more kinetic energy than potential energy.

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How does work affect energy between objects so it can cause a change in the form of energy?

Work transfers energy.

Work changes energy.

Work increases energy.

Work decreases energy.

The amount of kinetic energy an object has depends on which feature of the object?

its motion

its position

its gravity

its height

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.

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.

Shondra takes notes in class.

Switch "the energy of moving objects" and "the ability to do work" and place chemical energy under "Forms of energy."

Switch "the energy of flowing electrical charges" and "the energy in a spring" and place kinetic energy under "Forms of energy."

Switch "the energy in the nuclei of atoms" and "the energy stored in objects'" and place nuclear energy under "Main categories of energy."

Switch "the energy from the Sun" and "the energy of a rock on a hill" and place electrical energy under "Main categories of energy."

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