Mod. I Unit 1 L. 1 ws 2 Understanding Energy

What is the scientific definition of energy?

• The ability to create matter

• The ability to do work or cause changes in matter

• The ability to generate electricity

• The ability to conserve resources.

Energy is the ability to do work or cause changes in matter. Which of the following is an example of energy in use? A) A wind-up toy B) A stationary rock C) A closed book D) A sleeping cat. Fill in the blank: The example of energy in use is ____.

• A) A wind-up toy

• B) A stationary rock

• C) A closed book

• D) A sleeping cat

What is the scientific definition of work in terms of energy?

• The transfer of energy to an object by a force that causes the object to move in the direction of that force.

• The amount of energy required to stop an object.

• The energy stored in an object at rest.

• The energy lost due to friction.

Fill in the blank: Work (W) can be calculated using the formula W = Fd, where F is the force applied to the object and d is the ______.

• time taken

• distance the object moved

• speed of the object

• weight of the object

What is the relationship between energy and work?

• A) Energy is the ability to do work, and work requires a transfer of energy.

• B) Work is the ability to do energy, and energy requires a transfer of work.

• C) Energy and work are unrelated.

• D) Energy is the ability to rest, and work requires no energy.

Fill in the blank: The energy of motion is called ______.

• potential energy

• kinetic energy

• thermal energy

• chemical energy

What type of energy does a marble have at the top of a ramp?

• Kinetic Energy

• Gravitational Potential Energy

• Sound Energy

• Chemical Energy

Fill in the blank: When a marble rolls down a ramp, its potential energy is transformed into _________.

• Sound Energy

• Light Energy

• Kinetic Energy

• Chemical Energy

What is the mechanical energy of an object?

• The sum of the object's kinetic energy and potential energy

• The total kinetic energy of all the particles

• The energy due to chemical reactions

• The energy from electrical currents.

Thermal energy is the total kinetic energy of all the ______ that make up an object.

• waves

• particles

• atoms

• molecules