Heat and Waves Test Revision

Heat and Waves
Test Revision

​Hi year 9,

The intention of this quizizz lesson is for you to review and revise for your upcoming test. Use the information slides to ask yourself if you know each piece of information, and then check your understanding with the questions.

Remember, the test will also have short response questions where you need to have a deeper understanding than a simple multiple choice, so think about if you can write about each idea in detail.

Heat

• What is heat?

• Methods of heat transfer with examples of each

• Conductors and insulators

What is heat?

• Heat is the transfer of energy from a hotter object to a cooler one.

• Temperature measures how hot or cold something is but does not measure energy transfer.

Heat Transfer

Heat transfer occurs via:

• Conduction: Heat moves through direct contact of particles.

• Convection: Heat moves through fluids (liquids and gases) via currents.

• Radiation: Heat moves through electromagnetic waves, no particles needed.

Heat Transfer

Examples of heat transfer:

• Conduction: A metal spoon heating up in hot soup.

• Convection: Warm air rising and cool air sinking in a room.

• Radiation: Feeling warmth from the Sun or a campfire.

Conductors and Insulators

• Conductors: Materials that allow heat to pass through easily, e.g. metals.

• Insulators: Materials that slow down heat transfer, e.g. wood, foam.

• Insulators are used in clothing, homes, and thermos flasks to keep heat in or out.

Sound

• What is sound?

• Properties of sound waves

• How sound travels

What is sound?

• Sound is a type of energy made by vibrations.

• Vibrations cause air particles to compress and spread out, creating sound waves.

• Sound requires a medium (solid, liquid, or gas) to travel; it cannot travel in a vacuum.

Frequency: Number of vibrations per second, measured in hertz (Hz).

Pitch: How high or low a sound is.

​

Sound Waves

• High frequency = high pitch

• Low frequency = low pitch

Wavelength: The distance between two consecutive points on a wave, such as crest to crest or trough to trough.

Sound Waves

Amplitude: The amount of energy in the vibrations. Seen in the height of the wave. Measured in decibels (dB)

Sound Waves

• High amplitude = loud

• Low amplitude = quiet

Sound waves are longitudinal waves, where particles vibrate back and forth in the direction of the wave.

​

How Sound Travels

• Compressions: Particles are pushed closer together.

• Rarefactions: Particles are spread apart.

How do we hear?

Outer ear:





Middle ear:




Inner ear:

• Cochlea: Converts vibration of small hairs into electrical signals.

• Auditory Nerve: Carries signals to the brain for interpretation.

• Pinna: Captures sound waves and channels them into the ear canal.

• Ear Canal: Directs sound waves to the eardrum.

• Eardrum: Vibrates in response to sound waves.

• Ossicles: Three small bones that amplify sound.

Revision Questions


See if you can answer these without looking at your notes.

Multiple Choice

What is the main difference between heat and temperature?

• Heat measures energy transfer, while temperature measures the intensity of heat

• Temperature measures energy transfer, while heat measures intensity

• They are the same thing

• Heat can only occur in solids

Match

Match each process to its correct description:

• Heat transfer through direct contact

• Heat transfer via movement in fluids

• Heat transfer through electromagnetic waves

Conduction

Convection

Radiation

• Conduction

• Convection

• Radiation

Categorize

Options (15)

Feeling the Sun’s warmth on your skin

A metal spoon in hot soup

Touching a hot stove

An iron rod heated at one end

Ice melting in your hand

Heating a pan on a stove

Boiling water in a pot

Warm air rising near a heater

Ocean currents caused by temperature differences

A lava lamp’s movement of wax

Hot air rising from a bonfire

Heat from a campfire

A microwave heating food

The warmth from a light bulb

Heat emitted by a toaster

Match the heat transfer types with these examples:

Conduction

Convection

Radiation

Multiple Choice

Which of these is an insulator?

• Steel

• Aluminium

• Foam

• Copper

Dropdown

Materials that slow the transfer of heat are called​

Select answer

.​

Labelling

Label the parts of a sound wave diagram with the following terms:

Drag labels to their correct position on the image

Peak

Trough

Amplitude

Node

Wavelength

Multiple Choice

Why can't sound travel in space?

• There are no sound sources in space

• There is no medium (like air) for sound waves to travel through

• Space absorbs sound waves

• Sound waves are too weak in space

Fill in the Blank

Sound waves are made by __________ .

Fill in the Blank

Sound waves need a ______ to travel through.

Match

Match each term to its definition:

• Frequency

• Amplitude

• Wavelength

Number of waves per second

Height of the wave, determines loudness

Distance between two consecutive crests

• Number of waves per second

• Height of the wave, determines loudness

• Distance between two consecutive crests

Dropdown

A whistle has​

Select answer

, while a burp has​

Select answer

.

Multiple Choice

What determines the loudness of a sound?

• Wavelength

• Amplitude

• Frequency

• Speed

Reorder

Arrange the following in the correct sequence of sound travelling through the ear:

• Eardrum

• Ossicles

• Cochlea

• Auditory Nerve

1

2

3

4

• 1
• 2
• 3
• 4

Multiple Choice

Which part of the ear amplifies vibrations?

• Eardrum
• Ossicles

• Cochlea
• Auditory nerve
• Ear lobe

Match

Match the part of the ear to its function:

• Pinna

• Auditory Nerve

• Auditory Canal

• Eustachian Tube

Collects sound waves

Transmits sound to the brain

Channels sound to the eardrum

Equalises pressure in the ear

• Collects sound waves

• Transmits sound to the brain

• Channels sound to the eardrum

• Equalises pressure in the ear

Categorize

Options (4)

Conduction

Frequency

Radiation

Amplitude

Identify whether the following terms belong to "Heat" or "Sound":

Heat

Sound

Multiple Choice

Which of these is shared between heat and sound?

• Both require a medium to transfer

• Both involve electromagnetic waves

• Both cannot travel through solids

• Both involve the transfer of energy