Year 9 Science - Heat And Sound

20 Questions | By Brad75 | Last updated: Jul 30, 2021 | Total Attempts: 220

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1.

Your hand feels cold as an ice-block melts on it. Identify the correct explanation for this process.
- A.
  
  Heat has transferred from the ice-block into your hand by conduction.
- B.
  
  Heat has transferred from your hand to the ice-block by conduction.
- C.
  
  Heat has transferred from the ice-block into your hand by radiation.
- D.
  
  Heat has transferred from your hand to the ice-block by radiation.
2.

Select the alternative that lists insulators from the most to the least effective.
- A.
  
  A cotton T-shirt, a cotton windcheater, a woollen jumper, a parka
- B.
  
  A windcheater, a cotton T-shirt, a woollen jumper, a parka
- C.
  
  A parka, a woollen jumper, a cotton windcheater, a cotton T-shirt
- D.
  
  A woollen jumper, a cotton windcheater, a parka, a cotton T-shirt
3.

Sound is a longitudinal wave. This means that its particles:
- A.
  
  Vibrate back and forth
- B.
  
  Move along with the wave
- C.
  
  Vibrate from side to side
- D.
  
  Do not move at all
4.

The sound of a flute is produced because:
- A.
  
  Air vibrates as it enters the mouthpiece.
- B.
  
  The air around each hole in the flute vibrates.
- C.
  
  Your fingers vibrate as they cover specific holes.
- D.
  
  Different-sized columns of air inside the flute vibrate.
5.

An ultrasound pulse is reflected from a shark that is swimming 750 metres below the water surface. Given that the speed of sound in water is 1500 metres per second, the time delay between sending and receiving this pulse is:
- A.
  
  0.5 seconds
- B.
  
  1 second
- C.
  
  2 seconds
- D.
  
  3 seconds
6.

The part of the ear that provide us with our sense of balance is the:
- A.
  
  Semi-circular canals
- B.
  
  Eustachian tube
- C.
  
  Oval window
- D.
  
  Pinna
7.

A pool blanket is used to trap heat within a pool to prevent the water from rapidly cooling down overnight. Four types of pool blanket were tested on identical pools. Each pool was heated to 28°C and at 5 p.m. each pool blanket was used to cover a pool. At 9 a.m. the following morning, the blankets were removed and the water temperature tested in each case. The results were as follows: Pool blanket Silverline Hot stuff Luxury liner Thermospecial Temperature at 9 a.m. (°C) 26 24 25.5 23.5 Which was the best insulator?
- A.
  
  Silverline
- B.
  
  Hot stuff
- C.
  
  Luxury liner
- D.
  
  Thermospecial
8.

Various scales are used to measure temperature. The Kelvin is the standard SI unit for temperature. Absolute temperature in Kelvin = temperature in degrees Celsius + 273. This unit has NO degrees symbol. Convert 35°C into Kelvin.
- A.
  
  238 K
- B.
  
  308 K
- C.
  
  238˚ K
- D.
  
  308˚ K
9.

This table shows the approximate speed of sound in various materials and at different temperatures. Material Speed of sound (m/s) Air (at 0°C) 331 Air (at 18°C) 342 Water 1440 Wood 4500 Steel 5100 Glass 5200 By looking at this data you could conclude that:
- A.
  
  Sound travels at the same speed through all materials
- B.
  
  Sound travels faster at cooler temperatures
- C.
  
  Sound cannot pass through glass
- D.
  
  Sound travels faster through substances that are more dense
10.

True or false? Sound waves are longitudinal waves.
- A.
  
  True
- B.
  
  False
11.

True or false? The cochlear implant converts sounds into electrical impulses that are sent to the brain.
- A.
  
  True
- B.
  
  False
12.

True or false? Sound is produced by vibrations.
- A.
  
  True
- B.
  
  False
13.

True or false? Sound waves can travel in a vacuum.
- A.
  
  True
- B.
  
  False
14.

True or false? Sound waves are longitudinal waves.
- A.
  
  True
- B.
  
  False
15.

Which of the two sounds below have the same amplitude (loudness)? CHECK TWO BOXES A B C
- A.
  
  A
- B.
  
  B
- C.
  
  C
16.

Which of the three sounds below has the highest frequency? A B C
- A.
  
  A
- B.
  
  B
- C.
  
  C
17.

Watch the video above and then TICK ALL THE CORRECT boxes below...
- A.
  
  Sounds are collected by the outer ear.
- B.
  
  The ear drum vibrates when sound waves strike it.
- C.
  
  The inner ear contains the hammer, anvil and stirrup.
- D.
  
  The middle ear contains the hammer, anvil and stirrup.
- E.
  
  The cochlear is empty.
- F.
  
  The cochlear is filled with fluid.
- G.
  
  The tiny hairs in the cochlear transform vibrations into electrical signals that go to the brain.
18.

Watch the video above and then TICK ALL THE CORRECT boxes below...
- A.
  
  The sun transfers its heat energy through radiation.
- B.
  
  Conduction is when heat energy is transferred by vibrating particles.
- C.
  
  Conduction is when heat energy diffuses through a liquid or a gas.
- D.
  
  Convection is when heat energy is transferred by vibrating particles.
- E.
  
  Convection is when heat energy diffuses through a liquid or a gas.
19.

Watch the video above and then TICK ALL THE CORRECT boxes below...
- A.
  
  Sound is produced when something vibrates.
- B.
  
  Frequency refers to how loud the sound is.
- C.
  
  Frequency refers to the number of waves passing a point each second.
- D.
  
  The higher the frequency the higher the pitch or tone of the sound.
- E.
  
  Amplitude refers to how loud the sound is.
- F.
  
  Amplitude refers to the number of waves passing a point each second.

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