Forms of Energy

Forms of Energy

by Lauren Olivares

​Energy

​Energy- the ability to do work.

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Everything uses energy.

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​Energy never runs out, it simply changes form.

​5 Types of Energy

1. ​Mechanical

2. ​Electrical

3. ​Light

4. ​Thermal

5. ​Sound

​Mechanical Energy

​Mechanical energy is the energy of motion and position.

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​Everything that moves is using mechanical energy.

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​Two types of mechanical energy

​Potential and Kinetic

​Potential Energy

​Potential Energy- energy that is store in an object.

​Potential energy depends on the position of an object.

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​An object's potential energy can be released as any form of energy, not just mechanical.

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​Kinetic Energy

​Kinetic Energy- is the energy of motion.

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​Everything that moves is using kinetic energy.

​Electrical Energy

​Electrical energy is the movement of electrically charged particles. It flows through devices to power them.

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​Electrical energy can be transformed into other forms of energy.

Light Energy

​Light energy is the energy of traveling waves that makes things visible to the eye.

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​Sound Energy

​Sound energy- the energy of vibrations carried by air, water or other matter.

Vibrate- the back and forth motion of an object.

​Things you can do with sound energy:

​Hear it, See it, and Clean with it.

​How Sound Energy Travels

• ​Sound travels in waves called sound waves.

• ​Sound waves travel out from the source.

​Sound Travels

• Sound energy can travel through ​solids, liquids, and gas.

• ​Sound cannot travel through a vacuum ( a space with no matter).

• Echo- ​When sound energy hits a solid object it bounces back and produces and echo.

​Measuring Sound

​Sound can be measured by

​Pitch- how high or low a sound is

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​Frequency- how many times a sound wave vibrates

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​Volume- how loud or quiet a sound is.

​Thermal Energy

​Thermal Energy is the energy of moving particles.

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​Matter- physical particles that all things are made up of.

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​Temperature- Thermal energy is measured by temperature.

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​When matter moves quickly it heats up.

​Movement of Thermal Energy

Fast moving particles have more thermal energy and give off more heat.

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​Slow moving particles have less energy and give off less heat.

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Heat travels from a ​warmer object to a cooler one.

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Good Conductors- ​A good thermal conductor is material that can transfer heat energy.

​Metals are good conductors.

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​Thermal energy can only be exchanged if the two materials are different temperatures.

​Bad Conductors- cloth, wood, and rubber.

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​These materials are meant to keep heat in so it cannot be transmitted or exchanged.

​Conductors- a material or device that transmits energy.

​Insulator

​Insulator- a substance or material that does not allow the passage of energy- thermal or sound.

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​Examples are plastic, rubber, and cloth.

Multiple Choice

Sound is a kind of energy that travels in ..............

• waves

• current

• group

Multiple Choice

.............. is measure of how high or low a sound is.

• Pitch

• Temperature

• Length

Multiple Choice

All sounds are made by ............. objects.

• warm

• cold

• vibrating

Multiple Choice

Sound waves cannot travel through ...................

• solid

• liquid

• space

Multiple Choice

As sound waves move away from their source the sound become ....................

• louder

• softer

• faster

Multiple Choice

To ..................... is to move back and forth quickly.

• pitch

• crest

• vibrate

Multiple Choice

Which statement best defines Mechanical Energy?

• Energy produced by a machine or moving part.

• Energy that is produced by an electrical current in a circuit.

• Energy from the sun.

• Energy that travels in waves due to vibrations.

Multiple Choice

What has to be true about an object for it to have kinetic energy?

• it must be moving

• it must be elevated

• it must be experiencing a net force

• it must be accelerating

Multiple Choice

Does your desk have kinetic energy right now? Explain and justify your answer.

• yes because it is sliding across the room right now

• no because it is not moving

• yes because it has someone sitting in it

• no because it is here on earth

Multiple Choice

What energy do you produce riding your bike? __________

• Sound Energy
• Mechanical Energy
• Light Energy
• Electrical Energy

Multiple Choice

All of the following are examples demonstrating mechanical energy EXCEPT –

• an oven cooking food.
• a fan blowing out air. 
• a boy riding a bicycle.
• a girl writing with a pen.

Multiple Choice

What is potential energy?

• the energy an object has due to its position or condition
• the energy an object has due to its motions
• the energy an object has due to its chemical composition
• theh energy an object has due to its atomic structure

Multiple Choice

What is energy?

• The pivot point allowing a lever to move

• A push or a pull

• Measurement of weight

• The ability to move or allow something to move

Multiple Choice

What is an example of potential energy?

• A book sitting on a shelf

• A car moving down the highway

• A person playing basketball

• Both B and C

Multiple Choice

Energy is the ability to do __________

• bonds

• work

• atoms

• molecules

Multiple Choice

As temperature increases, molecules _____________

• move slower

• move the same

• move faster

• stop moving

Multiple Choice

When thermal energy is applied to an ice cube, it _____.

• freezes

• stays the same

• tastes better

• melts

Multiple Choice

Hot things have ____________ thermal energy than cold things

• more

• less

• same

• potato

Multiple Choice

Temperature is a way we ____________ energy

• eat

• measure

• gain

• lose