ks4 / p1b.11 now you see it now you don't test 10_ 11 mc questions

8/7/2019 KS4 / P1b.11 Now you see it now you don't test 10_ 11 MC questions

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Surname

Name

Signature

American Academy Larnaca

Year 4 Test 2

Triple Science Physics

Topic P1b.11 Now you see it, now you dont

TTThhhuuurrrsssdddaaayyy 222000 MMMaaayyy 222000111000

Multiple choice Time: 20 minutes

FORMULAE

You may find the following formulae useful.

takentimecovereddistancespeed =

tsv =

frequency

1period =

fT

1=

speed = frequency wavelength v = f


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Investigating Waves

Use this information to answer Questions 17 19.

Hayley, Kendall, Robyn and Shelley visit an exhibition about waves.They see some demonstrations about wave properties using a ripple tank.

The waves travel at a steady speed across the surface of the water.The girls measure the speed of the waves using a metre rule and a stopwatch.Here are some of their results.

Distance travelled by wave (cm) 10 10 10 20 20 35 35

Time taken for wave (s) 0.5 0.3 0.7 0.8 1.1 1.8 1.7

17. Kendall correctly calculated the average time for the three results for 10 cm.Her answer is

A 0.3 s

B 0.5 s

C 0.75 s

D 1.5 s

Direction of waves

Shallow tankof water

Wave generator


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18. The students discuss the experiment.

Who is evaluating the data?

A Hayley

B Kendall

C Robyn

D Shelley

19. The diagram shows a side view of the waves in the ripple tank.

The wavelength of the waves is

A 0.2 cm

B 0.4 cm

C 3 cm

D 30 cm

Doubling the distance

doubles the time taken.

We should work out

an average value of wave speed.

Some water splashed

over the side.

The times for 35 cm

are the most reliable.

Hayley Kendall

Robyn Shelley

0.4 cm

30 cm

NOT TOSCALE


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Catching Criminals

Police in helicopters can use a special camera to track a person in the dark.

20. The electromagnetic radiation which the camera detects is

A infrared

B microwave

C ultraviolet

D X-ray

21. The electromagnetic radiation which the camera detects is produced because the person is

A charged

B hot

C noisy

D vibrating

22. This process of imaging people who produce radiation is called

A scanning by absorption

B scanning by emission

C scanning by reflection

D scanning by refraction


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23. The pilot communicates with his base using digital radio signals.Which of these is a digital signal?

24. John and Imran discuss digital and analogue signals.

Who is correct?

A John only

B Imran only

C Both John and Imran

D Neither

Signals and Waves

John and Imran are investigating waves.

25. The speed of visible light in a vacuum is 300 000 000 m/s.Which row of the table is correct for ultraviolet waves?

Speed in a vacuum ( m/s) Type of wave

A 300 000 000 transverse

B 200 000 000 longitudinal

C 200 000 000 transverse

D 300 000 000 longitudinal

One disadvantage of analoguesignals is that the loss of qualityfrom interference cannot berestored.

One advantage of digital signalscompared to analogue signals isthat digital signals can behandled by microprocessors.

John Imran

A B

C D


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26. Which chart shows the electromagnetic waves in order of increasing wavelength?

A gamma rays X-rays ultraviolet visible microwave infrared radio

B radio infrared microwave visible ultraviolet X-rays gamma rays

C gamma rays X-rays ultraviolet visible infrared microwave radio

D radio microwave infrared visible ultraviolet X-rays gamma rays

27. John and Imran discuss electromagnetic waves.

John correctly states that the most dangerous electromagnetic waves have

A the highest frequencies and the longest wavelengths

B the lowest frequencies and the shortest wavelengths

C the highest frequencies and the shortest wavelengths

D the lowest frequencies and the longest wavelengths

28. Imran correctly describes an electromagnetic wave.Which row of the table gives Imrans description?

type of wave direction of travel direction of vibration

A transverse

B longitudinal

C longitudinal

D transverse

29. John and Imran discuss uses of electromagnetic waves.John correctly says that mobile phones send information using

A microwaves

B ultrasound waves

C ultraviolet rays

D X-rays

shortest waves longest waves


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30. Imran studies some X-ray images of broken bones.The images of the broken bones are produced because

A all X-ray radiation is reflected by the bone

B all X-ray radiation is transmitted by the bone

C some light can pass through the break in the bone

D some X-ray radiation is absorbed by the bone

31. John compares genuine and forged bank notes.Part of the genuine note fluoresces in ultraviolet light but the forgery does not.The fluorescence is caused by chemicals that

A absorb visible light

B absorb ultraviolet light and emit infrared wavesC absorb ultraviolet light and emit visible light

D reflect ultraviolet light

32.

Time

DistanceSpeed =

John and Imran use an echo sounder to measure the depth of a lake.The speed of sound in the lake is 1500 m/s and it takes 0.4 s for the sound to travel to the bottom and

return to the surface.The depth of the lake is

A 300 m

B 600 m

C 1875 m

D 3750 m

33. Speed = Frequency Wavelength

The frequency of the ultrasound wave used to measure the depth of a lake is 50 kHz.The speed of the wave is 1500 m/s.What is the wavelength of the wave?

A 0.03 m

B 30 m

C 75 000 m

D 75 000 000 m


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Earthquakes and Tsunamis

Use this information to answer Questions 34 & 35.

The table gives the speeds of two types of earthquake wave at different depths.

Depth

(km)

speed of longitudinal waves

(km/s)

speed of transverse waves

(km/s)

0 7 3

500 9 4

1000 11 6

2500 13 7

2900 14 7

3000 7 0

4000 10 05000 11 0

6000 12 0

34. An earthquake happens at position X as shown on the diagram.The paths of two waves reaching Y and Z are also shown.

Which row of the table is correct?

Types of waves reaching Y Types of waves reaching Z

A transverse only transverse and longitudinal

B longitudinal only transverse and longitudinal

C transverse and longitudinal transverse only

D transverse and longitudinal longitudinal only

Crust

Inner core

Outer core

X

Y

Z

Not toscale


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35. The radius of the Earth is 6370 km.The radius of the outer core could possibly be

A 2000 km

B 3300 km

C 4500 km

D 5000 km

36. It is difficult to predict tsunamis because

A earthquakes occur at random

B sea levels are rising unpredictably

C the oceans contain an uncertain amount of water

D the polar icecaps are melting at different rates


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37. John and Imran discuss the following diagram and the structure of the Earth.

Who is correct?

A John only

B Imran only

C Both John and Imran

D Neither

The diagram shows that P waves

can travel through the inner core.

The diagram proves that S waves cannot

travel through the inner core of the Earth.

John Imran

Earthquake

P waves only

No wavesNo waves

S & P wavesS & P waves

140 140

105105


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The Constellation Orion

A constellation is a group of stars that appear together in the sky and form a pattern.The diagram shows the main stars in the constellation Orion as we see them from Earth.

The stars in the constellation are at very different distances from Earth.Bellatrix is nearest to Earth and Alnilam is furthest away.

38. Imagine that Alnilam and Bellatrix both appear to us to be the same brightness.Which row of the table cannot be true?

Alnilam is Alnilam is

A bigger than Bellatrix brighter than BellatrixB bigger than Bellatrix dimmer than Bellatrix

C smaller than Bellatrix brighter than Bellatrix

D smaller than Bellatrix dimmer than Bellatrix

Betelgeuse

Rigel

Alnilam

What we seefrom Earth

Betelgeuse

Bellatrix

Earth

Rigel

The distances from theEarth are shown to scale.


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39. Imagine that X-ray and infrared signals are sent from Alnilam and from Bellatrix at the same time.Which statement is correct?

A Both the X-ray and the infrared signals from Bellatrix will arrive at the same time

B The X-ray signal from Alnilam could reach Earth before the infrared from Bellatrix

C The infrared signal from Alnilam could reach Earth before the X-rays from Bellatrix

D Scientists do not have enough information from which to predict

40.

Time

DistanceSpeed =

Rigel is a distance of 773 light years from Earth.One light year is the distance light travels in one year.

Light travels at 300 000 000 m/s (3 108

m/s).One year = 31 600 000 s (3.16 107 s).The distance from Earth to Rigel is about

A 2.3 1010

m

B 5.3 1014 m

C 7.3 1018 m

D 14.6 1018 m

TOTAL FOR MULTIPLE CHOICE PAPER: 24 MARKS

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ks4 / p1b.11 now you see it now you don't test 10_ 11 mc questions

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