Energy of Waves

Forms of Energy

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Energy

• The ability to do work

• Energy comes in many forms

Stored Energy

• Potential

• Chemical

Action Energy

• Light

• Sound

• Electrical

• Mechanical

• Kinetic

Waves

• Energy can travel through waves

• A wave is a disturbance that carries energy from one point to another point.

• Waves with greater distance from the midpoint to a crest or trough have more energy than waves with less distance

• Waves with shorter wavelengths have more energy

Multiple Choice

The lowest point of an energy wave is called the

• trough

• valley

• peak

• crest

Multiple Choice

Which of the following results in more energy for a wave?

• shorter amplitude

• lower frequency

• slower speed

• smaller wavelength

Multiple Choice

What is energy?

• moving energy

• stored energy

• renewable energy

• The ability to do work.

Multiple Choice

Which is a type of stored energy?

• kinetic

• light

• potential

• sound

Multiple Choice

The top of an energy wave is called the _______________.

• midpoint

• trough

• wavelength

• crest

Multiple Choice

Which has more energy?

• Short wavelengths

• long wavelengths

Multiple Choice

The distance from one crest to another crest is called ________.

• trough

• wavelength

• midpoint

• thermal energy

Multiple Choice

Which of the following is an example of mechanical energy?

Multiple Choice

What is NOT a form of energy?

• plastic

• sound

• electrical

• light

Thermal Energy and Heat

• Thermal energy is the kinetic energy and potential energy of particles of matter

• Heat is the transfer of energy from one place to another.

Light Energy

• Is energy we can see

• Light energy can reflect or bounce off objects

• Objects can absorb or take in light

• When light energy is blocked a shadow is formed

• Light energy can produce heat

• Light travels in straight lines and in waves.​

Multiple Choice

Turning on a space heater is an example of electrical energy being transformed into ______ energy.

• light

• sound

• heat

• chemical

Multiple Choice

Which material will heat travel through the fastest?

• Plastic

• Wood

• Metal

Multiple Select

Light travels...

(2 answers)

• around corners

• in a straight line

• in waves

• in circles

Multiple Choice

The Sun produces ______ and ______ energy

• thermal, light

• chemical, sound

• kinetic, light

Multiple Choice

Which direction will the heat flow while this person holds a hot cup of tea?

• from the cup to her hand

• from her hand to the cup

• no heat is transferred

Multiple Choice

Identify the type of energy

• Thermal energy

• Sound energy

• Mechanical energy

• Electrical energy

Multiple Select

The sun produces what kind of energy?

• Heat

• Light

• Electricity

• Solar

Chemical Energy

• Energy released by a chemical reaction 

• Wood, coal, food, gasoline, and natural gas are fuels that contain chemical energy

Sound Energy

• Sound happens when matter vibrates

• Volume is how loud or soft a sound is

• Pitch is how high or low a sound is. Pitch depends on its frequency.

Multiple Choice

Which of these is not a source of chemical energy?

• Spaghetti

• The Sun

• Battery

• gasoline

Multiple Choice

Which of the following is NOT an example of chemical energy?

• A glow stick

• A battery

• A rock about to fall off a cliff

• A burning match

Multiple Choice

................... is how loud or soft a sound is.

• Speed

• Wave

• Volume

Multiple Choice

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

• waves

• current

• group

Multiple Choice

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

• warm

• cold

• vibrating

Multiple Choice

A radio, siren, and a television are all designed to produce _______ energy.

• light energy

• sound energy

• mechanical energy

• electrical energy

Electrical Energy

• Electrical energy is the movement of electric charges.

• The movement of electric charge from one place to another is electric current

• To be useful, an electric current must be controlled path through wires and other materials

Conductors and Insulators

• Conductors are materials through which electric charge moves easily

• Copper, gold, silver, aluminum, graphite, and water are examples of conductors

• Insulators stop the movement of electric charges

• Rubber, wood and plastic are examples of insulators

Electrical Energy

• A circuit with no gaps or breaks is called a closed circuit

• Energy flows through a closed circuit

• A circuit with a broken path is an open circuit. Energy will not flow through and open circuit.

• Lightning is an uncontrolled electric current

Multiple Choice

When a switch is _________, the electric current can flow through the circuit.

• open

• closed

Multiple Choice

Which of the following is a good insulator?

• copper

• aluminum

• glass

• silver

Multiple Choice

A(n) ________ is formed when an electric current passes through an unbroken path of conductors.

• battery

• insulator

• surge protector

• circuit

Multiple Choice

Can the electricity go through ?

• Yes.

• No, because it is open.

• Yes, because it is closed.

Multiple Choice

Which of the following is a good conductor?

• gold

• wood

• ceramic

• plastic

Multiple Choice

Any time an energy conversion takes place, some of the original energy is converted to which one of the following?

• a. sound energy

• b. potential energy

• c. light energy

• d. thermal energy

Multiple Choice

In the image, energy is being transformed from...

(2 answers)

• chemical to electrical and then kinetic

• chemical to kinetic and then potential

• chemical to thermal and then kinetic

• None