Sound and Heat

Question 1

How do you change the loudness or the pitch of a sound?

Answer 1

Loudness= increase the energy of the vibrations.

Question 2

How can sound waves be compared using an oscilloscope?

Answer 2

You can see the wave difference visaually in sound waves

Question 3

Frequency

Answer 3

pitch of a note

Question 4

wavelength

Answer 4

how stretched or squished the curvy lines are.

Question 5

amplitude

Answer 5

The amount of energy that a sound wave has.

Question 6

What are soundwaves?

Answer 6

They are the wave that goes through an object(such as air)

Question 7

How can echoes be used?

Answer 7

Fisherman use echoes by having the sound waves sent form the boat. If a shoal of fish are underneath the boat the echo will come back faster

Question 8

speed of sound =?

Answer 8

air=330m/s water=1500m/s brick=4300m/s iron 5000m/s

Question 9

what is the hearing range in humans?

Answer 9

20 Hz-20,000 Hz

Question 10

What is ultrasonic?

Answer 10

sound waves above human hearing threshold

Question 11

What can we do to prevent hearing damage?

Answer 11

turn down the volume, wear ear defenders when working in noisy places or with loud machinery, avoid shouting, use sound proofing

Question 12

What is the difference between heat and temperature?

Answer 12

Temperature measures heat

Question 13

What is a conductor

Answer 13

something that heat can pass through

Question 14

What is an insulator?

Answer 14

something that heat cannot pass through

Question 15

What is convection?

Answer 15

When a kettle boils,the hot air rises and the cool air falls. This circulation current is called convection.

Question 16

What happens to the energy from the sun.

Answer 16

We get solar radiation from the sun. White and shiny surfaces reflect heat. Dull/dark surfaces absorb heat. Al hot objects emit radiant heat.