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7/29/2019 Edexcel GCSE Science 2011 P1 Topics 4 and 6 test [with answers]
1/15
PART A
Surname Name
American Academy Larnaca
Year 4 Physics
Semester 2 Test 3
Unit P1 Universal Physics
Topic 4 Waves and the Earth
Topic 6 Energy and the Future
Wednesday 27 May 2012Wednesday 27 May 2012
Part A Time: 20 minutes
FORMULAE
You may find the following formulae useful.
wave speed = frequency wavelength v =f
takentime
covereddistancespeedwave =
t
xv =
electrical power = current potential difference P=I V
cost of electricity = power time cost of 1 kilowatt-hour
takentime
usedenergypower=
t
EP=
%100device)thetosuppliedenergy(total
device)by thensferredenergy tra(usefulefficiency =
coilsecondaryonturnsofnumber
coilprimaryonturnsofnumber
voltagesecondary
ltageprimary vo=
s
p
s
p
N
N
V
V=
Do not forget to include units in all your answers.
PART A Turn over1
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PART A
*1. (a) (i) Put a cross ( ) in the box next to the correct answer.
[1 mark]
Here you can see a representation of a sound wave.
Which is correct?
A The wave is longitudinal and the wavelength is Q
B The wave is transverse and the wavelength is P
C The wave is longitudinal and the wavelength is R
D The wave is transverse and the wavelength is S
(ii) Elephants communicate with sounds that have frequencies equal to 15 Hz.
Explain why we call this type of sound infrasound and why can elephants often sense
volcanic eruptions.
[2 marks]
(b) Ultrasound has many applications.
(i) Write down one frequency that belongs to the ultrasound.
[1 mark]
(ii) One of the uses is scanning the womb.
Explain why the mothers belly is covered with a gel before the scan.[2 mark]
PART A Turn over
P
R
Q
S
2
Gel
Ultrasound
transmitter
& receiver
7/29/2019 Edexcel GCSE Science 2011 P1 Topics 4 and 6 test [with answers]
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PART A
(iii)
(iii) A boat produces an ultrasound pulse.
It takes 1.6 sec for the ultrasound to be reflected from the sea bed and back to the ship.
Find the depth dof the sea bed.
Dont forget the unit.
Speed of sound in sea water = 1500 m/s
[2 marks]
Depth of sea bed, d=
[Total for Q1 = 8 marks]
_______________________________________________________________________________________
PART A Turn over
d
sea bed
ultrasound pulse
NOT TO
SCALE
shoal of fish
3
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PART A
2. (a) (i) Put a cross ( ) in the box next to the correct answer.
[1 mark]
Here are two different types of waves.
Which is correct?
A P waves are like Wave 1, S waves are like Wave 2
B Both P and S waves are like Wave 1
C S waves are like Wave 1, P waves are like Wave 2
D Both P and S waves are like Wave 2
(ii) Three seismometers A, B and C detect an earthquake.
The circles denote distance from each seismometer.
The distance between two circles is 50 km.
The earthquake happened 100 km from A, 100 km from B and 150 km from C.
Mark on the drawing the position of the epicentre.
[1 mark]
PART A Turn over
Wave 1 Wave 2
A
B
C
50 km
4
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PART A
(b) The picture below shows how the Earths crust is divided into separate parts.
(i) What do we call these parts?Explain the connection between the movement of these parts and earthquakes.
[2 marks]
(ii) Explain what causes the movement of these separate parts.
[2 marks]
PART A Turn over5
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PART A
* (c) The picture above shows seismic waves spreading out from the epicentre and the traces that
seismometers register in different regions of the Earth.Explain why the traces are different and what this implies about the Earths internal structure.
You can add to the diagram above.
[6 marks]
[Total for Q2 = 12 marks]
_______________________________________________________________________________________
TOTAL FOR PART A = 20 MARKS
_______________________________________________________________________________________
END
TOTAL FOR PAPER = 40 MARKS
PART A
Earthquake epicentre
Shadow zone
no waves detected here
One type of seismic wave detected here
Two types of seismic wave
detected here
arriving at different times
A
B
6
7/29/2019 Edexcel GCSE Science 2011 P1 Topics 4 and 6 test [with answers]
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PART B
Surname Name
American Academy LarnacaYear 4 Physics
Semester 2 Test 3
Unit P1 Universal Physics
Topic 4 Waves and the EarthTopic 6 Energy and the Future
Wednesday 27 May 2012Wednesday 27 May 2012
Part B Time: 20 minutes
FORMULAE
You may find the following formulae useful.
wave speed = frequency wavelength v =f
takentime
covereddistancespeedwave =
t
xv =
electrical power = current potential difference P=I V
cost of electricity = power time cost of 1 kilowatt-hour
takentime
usedenergypower=
t
EP=
%100device)thetosuppliedenergy(total
device)by thensferredenergy tra(usefulefficiency =
Do not forget to include units in all your answers.
PART B Turn over1
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PART B
1. An experiment is arranged to model earthquakes.
A brick is covered with sandpaper and placed on another piece of sandpaper.
Weights are then hanged until the weight moves (meaning an earthquake takes place).
Weights are hanged 2 g every time.
The mass that moves the block is recorded for every trial.
The results are given below.
Trial 1 2 3 4 5 6
Mass that moves the block (g) 20 22 18 20 24 18
(a) Plot a bar chart of the results below in the space below.
[2 marks]
1 2 3 4 5 6
Trial
Mass
(g)
(b) State whether earthquakes are predictable or not and explain why.
[2 marks]
[Total for Q1 = 4 marks]
_______________________________________________________________________________________
PART B Turn over
brick
sandpaper
weights
2
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PART B
2. (a) Put a cross ( ) in the box next to the correct answer.
[1 mark]
Conservation of energy in a system means
A input energy = output energy
B input energy = output energy + heat
C input energy + heat = output energy
D input energy + output energy = heat
(b) Below you see the Sankey diagram of a car engine.
(i) The car is moving up a hill by burning fuel.
Complete the energy transfer chain below.
Use the words below (you may use each word once, more than once or not at all).
[2 marks]
chemical elastic electrical gravitational potential kinetic light thermal
(ii) The efficiency of a modern car engine is 35 %.
Find the amount of useful energy X.
[2 marks]
Amount of useful energy, X =
(iii) Find how much energy turns into Y.
[2 marks]
Amount of energy Y =
[Total for Q2 = 7 marks]
_______________________________________________________________________________________
PART B Turn over
900 J
35 J
X
Y
sound
energy
energy,
energy
& sound
energy
3
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PART B
3. (a) Put a cross ( ) in the box next to the correct answer.
[1 mark]
Look at the colour and temperatures of the four objects below.
They are made of the same material and have the same size.
Which emits more radiation?
A B C D
(b) Scientists believe that global warming is caused by greenhouse gases.
(i) Name one such greenhouse gas and explain how these gases increase the temperature.
[2 marks]
(ii) Snow reflects radiation from the Sun.
The oceans absorb radiation from the Sun.
Explain why a rise in Earths temperature will cause an even larger temperature increase.
[2 marks]
PART B Turn over
white
15 C
white
30 C
black
30 C
black
15 C
4
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PART B
* (c) Two metal plates are placed on the ground.
They are made of the same metal and have an area of 1 m2.
Each receives the same amount of energy per second.
One plate is white, the other one is black.
Their temperature is checked in regular intervals (Figure 1).
Explain why the black plate reaches a higher temperature that eventually stays constant.
How does this affect the construction of hot water solar panels that we use to heat water?
[4 marks]
[Total for Q3 = 9 marks]
_______________________________________________________________________________________
TOTAL FOR PART B = 20 MARKS
_______________________________________________________________________________________
END
TOTAL FOR PAPER = 40 MARKS
PART B
Figure 1 Figure 2
5
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MS
MARK SCHEME
PART A
p. 2 & 3
1. (a) (i) C [1 mark]
(ii) Anyone of [1 mark]
(frequency) < 20 Hz
Below hearing range
&
(Volcanic) eruptions produce infrasound (that elephants detect) (or similar) [1 mark]
(b) (i) Anyf> 20 kHz [1 mark]
Number > 20 000 without unit [1/2 mark]
For number > 20 without unit, no marks
(ii) Stop ultrasound being reflected from skin [1 mark]
&
Anyone of [1 mark]
More ultrasound enters the womb
More ultrasound reflected from the baby
Better picture / resolution (or similar)
(iii) Formulax = v tor direct substitutionx = 1500 1.6 [1 mark]
x = 2400 m [1/2 mark]
d=x / 2 = 1200 m [1/2 mark]
Accept unit anywhere in the solution
If unit wrong or missing [1/2 mark]
MS 1
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MS
p. 4, 5 & 6
2. (a) (i) A [1 mark]
(ii)
Accept any mark on the drawing showing that point
(b) (i) Tectonic plates [1 mark]
Earthquakes take place when they slide past each other (or similar) [1 mark]
(ii) Convection currents [1 mark]
&
Anyone of [1 mark]
In the mantle
Due to the hot core (or similar)
(c) Earthquake detection
At A both P & S waves
At B only P waves
P waves = longitudinal
S waves = transverse
Longitudinal / P waves cannot travel in liquids so do not go through liquid coreShows that core is liquid
Waves are refracted as they move through different rocks inside the Earth
So no waves are detected in shadow zones
Level Marks
1 1 2 P = longitudinal
S = transverse
Labels mantle & liquid outer core
2 3 4 Refers to S / transverse not travelling through liquid (outer) core
At A = P & S waves
At B = only P waves
3 5 6 Refers to refraction of waves
Change in direction due different rock structure / compositionRelates to shadow zones
MS
A
B
C
[1 mark]
2
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MS
MARK SCHEME
PART B
p. 2
1. (a)
0
10
20
30
1 2 3 4 5 6
Trial
Mass
(g)
Correct scale on y-axis [1 mark]At least 5 correct bars [1 mark]
(b) Not predictable [1 mark]
&
Anyone of [1 mark]
Internal structure of the Earth not known
Impossible to measure forces between plates
Friction forces between plates not known (or similar)
p. 3
2. (a) A [1 mark]
(b) (i)
Each correct match = [1/2 mark]
(ii) Formula or substitution: 35 % = 0.35 = useful / 900 [1 mark]
Useful = 0.35 900 [1/2 mark]= 315 J [1/2 mark] Ignore absence of unit
If unit wrong [1/2 mark]
(iii) Correct formula: 900 = 35 + { X / 315 }+ Y ORY = 900 315 35 [1 mark]
Correct answer: Y = 550 J [1 mark] Ignore absence of unit
If unit wrong [1/2 mark]
MS
chemicalenergy
kineticenergy,
thermal/ heatenergy& sound
gravitationalpotentialenergy
3
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MS
p. 4 & 5
3. (a) C [1 mark]
(b) (i) Carbon Dioxide / Methane / Water vapour [1 mark]
&
Greenhouse gases absorb some of the heat / radiation from the Sun [1 mark]
(ii) Less shiny surfaces / More dark surfaces (as snow melts) [1 mark]
Less reflection / More absorption (or similar) [1 mark]
(c) Black is a better absorber of radiation
Temperature increases
As temperature increases it emits more radiation
When absorbed radiation = emitted radiation => constant / balanced / steady temperature
The steady temperature is higher than previous
Solar panels are made black to absorb more radiation
Heat water faster / Water maintained at higher temperature
Level Marks
1 1 2 Reference to better absorption by black colour
Subsequent increase in temperature
Use in water heaters
2 3 4 Reference to balance
Absorbed radiation = emitted radiation
More radiation emitted as temperature increases
Constant temperature is higher than before
MS 4