edexcel science 2011 p1 mock with answers

7/30/2019 Edexcel Science 2011 P1 mock with answers

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SCIENCE PHYSICS

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Surname Name

AMERICAN ACADEMY LARNACA

YEAR 4 FINAL EXAM

Science/Physics

Unit 1: Universal Physics Higher Tier

Thursday 16 May 2013 Time: 1 hour

You must have:

Calculator, ruler

Total Marks

Instructions

Use blackink or ball point pen.

Fill in the boxes at the top of this page with your Surname and Name.

Answerall questions.

Answer the questions in the spaces provided

there may be more space than you need.

Information The total mark for this paper is 60.

The marks foreach question are shown in brackets

use this as a guide as to how much time to spend on each question.

Questions labelled with an asterisk(*) are ones where the quality

of your written communication will be assessed you should take particular care with your spelling, punctuation and grammar,

as well as the clarity of expression, on these questions .

Advice Read each question carefully before you start to answer it.

Keep an eye on the time.

Try to answer every question.

Check your answers if you have time at the end.


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1. A student uses a converging lens to make an image of the Sun.

(i) Complete the sentence by putting a cross ( ) in the box next to your answer.

The lens forms a real image of the Sun at P, where the light rays cross.The distance dis the

(1 mark)

A focal point

B focal length

C object length

D object distance

(ii) Radiation from the Sun includes some infrared waves.

The lens bends infrared waves less than it does ordinary light.

Label, with an R, a place on the diagram where the infrared rays could cross.

(1 mark)[Total for Q1 = 2 marks]

_________________________________________________________________________________________


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2. A cluster is a group of galaxies.

The image shows a section of the Virgo Cluster.

(i) Complete the sentence by putting a cross ( ) in the box next to your answer.A galaxy is

(1 mark)

A an interstellar explosion

B a collection of stars

C a collection of planets

D a black hole

(ii) The Virgo Cluster is about 50 million light years away from Earth.

Our Sun is about 150 million km away from Earth.

Why are these two distances measured in different units?

(1 mark)................................................................................................................................................................

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(iii*) The photograph shows a nebula and many stars.

A nebula is a cloud of gas and dust from which stars are formed.

Describe the energy changes involved when a main sequence star forms from gas and dust andhow the mass of a main sequence star will affect what the star finally becomes.

(6 marks).................................................................................................................................................................

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[Total for Q2 = 8 marks]_________________________________________________________________________________________


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3. The Earths atmosphere absorbs electromagnetic radiation.

The diagram shows how the amount absorbed changes with wavelength.

(i) How much of the visible light from space is absorbed as it passes through our

atmosphere?

Put a cross ( ) in a box to show your answer.(1 mark)

A 0%

B 10%

C 90%

D 100%

(ii) Large telescopes which collect visible light to explore the Universe are usually placed near the

tops of mountains.

Suggest why radio telescopes do not have to be placed high up a mountain.

(1 marks).................................................................................................................................................

(iii) The electromagnetic radiation from most galaxies has a red-shift.

Suggest why, when a galaxy has a very large red-shift, some of its visible light is not detected through

the Earths atmosphere.

(2 marks)

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[Total for Q3 = 4 marks]_________________________________________________________________________________________


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4. (a) Complete the sentences by putting a cross ( ) in the box next to your answer.

(i) All electromagnetic waves are

(1 marks)

A longitudinal and have the same amplitude in a vacuum

B longitudinal and have the same speed in a vacuum

C transverse and have the same amplitude in a vacuumD transverse and have the same speed in a vacuum

(ii) All electromagnetic waves have both uses and dangers.

Their potential danger increases when

(1 marks)

A frequency decreases and wavelength decreases

B frequency increases and wavelength decreases

C frequency decreases and wavelength increases

D frequency increases and wavelength increases

(b) Some microwaves have a frequency of 1.5 1010 Hz.They travel at a speed of 3.0 108 m/s.

Calculate their wavelength.

(3 marks)

.......

.......

wavelength =........................ m

[Total for Q4 = 5 marks]

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5. (a) Some students carry out investigations with an electric motor.

Complete the sentence by putting a cross ( ) in the box next to your answer.

The students read the statement: All the energy supplied to the motor eventually ends up as thermal

energy in the surroundings.

This statement best describes the idea of

(1 marks)

A renewable energy

B energy efficiency

C sustainable energy sourcesD conservation of energy


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(b) The graph shows the input energy the motor needs to lift different loads by one metre.

What can you conclude from the graph about the relationship between the load lifted and the input

energy needed?

(2 marks)........................................................................................................................................................

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(c) The lights on a bicycle can be powered by a battery or a dynamo.

power = voltage current

(i) Complete the sentence by putting a cross ( ) in the box next to your answer.

Power can be defined as

(1 marks)

A current per second

B energy per second

C frequency per second

D voltage per second

(ii) The 9 V battery in a bicycle light produces a current of 0.35 A.

Calculate the power supplied to the light by the battery.

(2 marks)

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power = ...................................................... W

[Total for Q5 = 5 marks]_________________________________________________________________________________________


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6. The diagram shows the National Grid system.

The National Grid includes step-up transformers.

Explain why.

(4 marks).............................................................................................................................................

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[Total for Q6 = 4 marks]_________________________________________________________________________________________


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7. Earthquakes are sometimes caused when plates in the Earths crust move.

The diagram shows some corks floating on water.

(a) Explain how this model of corks on water could be used to demonstrate what causes the Earths plates

to move.

You may add to the diagram to help with your answer.

(3 marks)

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(b)The movement of the Earths plates can cause earthquakes.

The charts give information about the waves arriving at three research stations from the same earthquake.

(c) State two differences between P-waves and S-waves.

(2 marks).................................................................................................................................................

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(d) A student suggested that the time between the arrival of the P-wave and the S-wave was

proportional to the distance of the station from the earthquake.

Use the charts to evaluate whether this is correct or not.

(3 marks).................................................................................................................................................

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[Total for Q7 = 8 marks]_________________________________________________________________________________________


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8. When this bicycle wheel turns the dynamo, it generates electricity.

A dynamo contains a magnet moving near a coil of wire.

The diagram below shows a magnet moving near a coil.


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(a) When the magnet is just entering the coil the pointer on the meter points to the

number 2 as shown.

(i) The magnet stops moving and remains inside the coil.

Draw an arrow on the meter below to show the position of the pointer now.

(1 mark)

(ii) The magnet now moves out of the coil at the same speed as before.

Draw an arrow on the meter below to show the position of the pointer just as

the magnet leaves the coil.

(1 mark)

(b) The dynamo is then connected to a data logger.

The data logger is connected to a computer.

The wheel on the bicycle turns at a steady speed.

The computer screen displays the following graph.

(i) The wheel on the bicycle now turns faster.

On the same axes, draw the graph of output against time at this new speed.

(2 marks)


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(ii) What evidence does the graph provide to show that the output is alternating?

(1 mark).................................................................................................................................................


_________________________________________________________________________________________

9. (a) A wood burning stove is used to heat a room.

(i) The fire in the stove uses wood as a fuel. The fire heats the matt black metal case of the stove.

The air next to the stove is warmed by infrared radiation.

How does the design of the stove help to improve the rate of energy transfer by infrared

radiation?

(2 marks)

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...................................................................................................................

(ii) Burning 1 kg of wood transfers 15 MJ of energy to the stove. The stove then transfers

13.5 MJ of energy to the room.

Calculate the efficiency of the stove.

Show clearly how you work out your answer.

(2 marks)

...........................................................................................................................................................

...................................................................................................................................

Efficiency =


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(b) In some countries, infrared rays from the Sun are used to cook food.

Light and infrared rays are both focused using a converging mirror.

(i) State what happens to the rays at S.

(1 mark)..........................................................................................................................................................

(ii) Explain why the light rays and infrared rays converge towards the same point.

(2 marks)..........................................................................................................................................................

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(iii)The infrared waves travel at a speed of 300 000 km/s.

They take 500 s to travel from the Sun to the Earth.

Calculate the distance between the Earth and the Sun.

(3 marks)...........................................................................................................................................................

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distance = .................................................................. km

(c) In winter electricity is also used for heating. A 2.6 kW storage heater is switched on each day between

midnight and 7 am. Between these hours electricity costs 20p per kilowatt-hour.

Calculate the weekly cost of using the storage heater.

(3 marks)

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Cost =


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10. The diagram shows the apparatus that a student used to investigate the heating effect of different

wavelengths of light.

(a) (i) What process happens at the point labelled X on the diagram?

(1 mark)...........................................................................................................................................

(ii) The student put thermometerD outside of the light spectrum.

Suggest why.

(1 mark)

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(iii)The table gives the position and reading of each thermometer 10 minutes after the

investigation started.

What should the student conclude from the data in the table?

(2 mark)..........................................................................................................................................................

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(b) A similar investigation completed in 1800 by the scientist Sir William Herschel led to the discovery of

infrared radiation.

Suggest how the student could show that the spectrum produced by the glass prism has an infrared region.

(2 mark)......................................................................................................................................................................

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[Total marks for paper = 60 marks]


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MARK SCHEME

Question

Number

Answer Acceptable answers Mark

1.(i) B (1)

1.(ii) R marked on the axis

to the right of P (1)

2.(i) B (1)

2. (ii) Any one from:

1 light year (lyr) is much bigger than a km

the galaxy

Virgo Cluster is much further from Earththan the Sun

to keep the numbers (reasonably)

understandable (1)

2. (iii*) Description including some of the following

points:

gravitational (potential) energy kineticenergy

kinetic energy thermalenergy/heat/light

1-2 marks

[core] hot enough to cause nuclear fusion

He fuses to H releasing huge amounts of

energy 3-4 marks

more massive stars fuse helium more

quickly/shorter lifetimes

become red giants/supernova/etc. 5-6 marks

3. (i) B (1)3. (ii) radio waves are not

absorbed by the

atmosphere

not affected by light

pollution / clouds

(1)

3. (iii) Explanation

including two of the

following:

1 mm waves are

in the microwave

region

which is

(completely)absorbed by

atmosphere

space flightenabled

telescopes to be

put above

atmosphere /in

space

they are microwaves

cannot be (easily)

detected on Earth we

needed to go above

atmosphere / into

space

(2)


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SCIENCE PHYSICS

Question

number


4.(a)(i) D (1)

4. (a)(ii) B (1)

4.(b) 3.0 10 [m/s] = 1.5

1010 [Hz]

= 0.02 (m)

Give full marks for

correct answer, no

working Allow

substitution and

transposition in either

order if clearIgnore

powers of 10 until

evaluation e.g. 3/1.5

2 marks = f/c (0)

then 1.5/3 1 mark

bald 1.5/3 0 mark 2

10-2 (m) ignore

formula triangle

(1)

(1)

(1)

5.(a) D (1)

5.(b) as load increases

energy needed

increases

at increasing rate/not

proportional

(1)

(1)

5.(c)(i) B (1)

5.(c)(ii) 0.35[A] x 9[V]=

3.15 [W](1)

(1)

6. Step-up transformer increases V and

decreases I reducing power loses in cables

1-2 marks

For given P more V means less I/use of P=IV.

Less I [in cables] means less power loss

heating surroundings

3-4 marks

7.(a) An explanation

linking the following

points

corks as plates /

water as mantle (1)

water heated

(underneath) (1) convection

currents mentioned

labels on diagram

corks as crust / water

as magma /lava

reference to heat in

the Earth arrow on

diagram(1)

(1)

(1)

7.(c) P-waves are longitudinal but S-waves are

transverse

P-waves can travel through solids and liquids

but S-waves only through solids

(1)

(1)

7. (d) Some measurement[s] of S-P times

S-P/distance ratios shone to be constant or

similar

(2)

(1)


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Question

Number


8.(a)(i) pointer at zero

(1)

8.(a)(ii) pointer at2

(1)

8.(b)(i) curve drawn with: higher maximum current

(1) shorter time period (1)

(2)

8.(b)(ii) between +ve and -ve above and below 0 (1)

9.(a)(i) Matt black surface

is good radiator(1)

(1)

9.(a)(ii)

90%

(1)

(1)

9.(b)(i) reflected (1)

9.(b)(ii) An explanation linking the following points:

laws of reflection / equal angles same for both types of wave

(1)(1)

d = 150 000 000

Full marks for correct

answer, no working(2)

(1)

9.(c) 2.6[kW] x 7[h] = 18.2 [kWh]

7 x 18.2k[Wh] = 127.4[kWh]

127.4 [kWh] x 20p/kWh = 25.48

(1)

(1)

(1)

10.(a)(i) refraction dispersion (1)

10.(a)(ii) control room temperature (1)

10.(a)(iii)all colours cause an increase in

temperature/transfer energy

red/longer wavelengths transfer more(1)

(1)

10.(b) place a thermometer above/beyond red

measure even higher temperature(1)

(1)


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edexcel science 2011 p1 mock with answers

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