B4C4P4

H


GENERAL CERTIFICATE OF SECONDARY EDUCATION

A215/02
TWENTY FIRST CENTURY SCIENCE

ADDITIONAL SCIENCE A

UNIT 1 – Modules B4 C4 P4 (Higher Tier)


SAMPLE ASSESSMENT MATERIAL
(from 2010 onwards)
Time: 40 minutes
Candidates answer on the question paper
Additional materials (enclosed):
None

Calculators may be used.
Additional materials:
Pencil

Ruler (cm/mm)




Candidate
Candidate

Forename
Surname



Centre
Candidate










Number
Number




INSTRUCTIONS TO CANDIDATES
Write your name in capital letters, your Centre Number and
FOR EXAMINER’S
Candidate Number in the boxes above.
USE
Use black ink. Pencil may be used for graphs and diagrams only.
Qu.
Max.
Mark
Read each question careful y and make sure you know what you
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5

have to do before starting your answer.
Answer all the questions.
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5

Do not write in the bar codes.
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1

Do not write outside the box bordering each page.
Write your answer to each question in the space provided.
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1


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2

INFORMATION FOR CANDIDATE
The number of marks for each question is given in brackets [ ] at
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4

the end of each question or part question.
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5

The total number of marks for this paper is 42. A list of physics
equations is printed on page two.
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5

The Periodic Table is printed on the back page.
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4

10
7

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3

TOTAL 42



This document consists of 17 printed pages and 3 blank pages.

SP SJF4637/CG) T50952/2
© OCR 2009 [D/103/3775]
OCR is an exempt Charity
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2
TWENTY FIRST CENTURY SCIENCE EQUATIONS
Useful Relationships
Explaining Motion
speed = distance travelled

time taken
momentum = mass × velocity
change of momentum = resultant force x time for which it acts
work done by a force = force x distance moved by the force
change in energy = work done
change in GPE = weight x vertical height difference
kinetic energy = ½ × mass x [velocity]2
Electric Circuits
resistance =
voltage


current
Voltage across primary coil
=
Number of turns in primary coil
Voltage across secondary coil

Number of turns in secondary coil
energy transferred = power x time
power = potential difference x current
efficiency = energy usefully transferred × 100%


total energy supplied
The Wave Model of Radiation
wave speed = frequency × wavelength

© OCR 2009

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3
Answer all the questions.
1 Jenny studies four elements Li, Na, K and Cs.
She finds this information in a book.
Li

boiling point
Na
in C
K
Li
1342
Cs
Na
883
K
760
PERIODIC TABLE
(a) The book does not list data for the element Cs.
Suggest a value for the boiling point of Cs.
Give reasons for your answer.

boiling point = ............................. C
.................................................................................................................................................
..................................................................................................................................................
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............................................................................................................................................ [3]

(b) Jenny carefully adds some potassium to cold water.
Describe what she sees.
Include a word equation for the reaction.
..................................................................................................................................................
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..................................................................................................................................................
............................................................................................................................................ [2]


[Total: 5]
© OCR 2009

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4
2 Lithium chloride is an ionic compound. It dissolves in water.
(a) Which diagram, A, B, C or D, shows the particles in a lithium chloride solution?


[1]
(b) How can we be certain that lithium chloride is ionic?
Put a tick ( ) in the box next to the correct answer.
Solid lithium conducts electricity.



Solid lithium chloride conducts electricity.



Molten lithium chloride conducts electricity.



Lithium chloride has a high melting point.


[1]
(c) Lithium reacts with bromine.
Balance the equation for this reaction.

[2]
(d) Solid iron also reacts with bromine vapour. It makes crystals of iron bromide.
Add state symbols to the equation below.

[1]

[Total: 5]
© OCR 2009

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5
3 When Bobby throws copper compounds into a flame, the flame gives a green light.
When Bobby throws calcium compounds into a flame, the flame gives a red light.
He uses a spectrometer to compare the spectrum of calcium with that of copper.
A spectrum is made of a series of lines.

Put a tick ( ) in the box next to the correct statement about a calcium spectrum.
The lines are in the same place as the copper lines.
All the lines are red.



The lines are in different places from the copper lines.
Each line is a different colour.



The lines are in the same place as the copper lines.
Each line is a different colour.



The lines are in different places from the copper lines.

All the lines are green.

[1]

[Total: 1]
© OCR 2009

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6
4 The formula of sodium phosphate is Na3PO4. The sodium ion is Na+.
Put a ring around the correct formula of the phosphate ion.


[1]

[Total: 1]



5 The table shows the numbers of protons, neutrons and electrons in different particles A, B, C, D
and E.

Which particle has the greatest mass?.....................................
Which particle has a negative charge?.......................................
Which particles are atoms?..............................................

[2]

[Total: 2]
© OCR 2009

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6 The diagram shows the forces acting on a helicopter in level flight.

(a) What is the direction of the resultant force on the helicopter?
Put a ring around the correct answer.

backwards
downwards
forwards
upwards
[1]
(b) What is the size of the resultant force on the helicopter?
Put a ring around the correct answer.

1 kN
2 kN
3 kN
5 kN
12 kN
[1]
(c) Which quantities will be increasing for the helicopter?
Put ticks ( ) in the boxes next to the two correct answers.
height

weight

momentum

kinetic energy

gravitational potential energy


[2]

[Total: 4]
© OCR 2009

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7 Paul is a taxi driver in town.

He claims that his speed is always less than 50 km / h, and he can use friction to reduce his
velocity to zero.
(a) Draw a straight line from each quantity to its correct definition.



[1]
(b) What is the correct way of converting 50 kilometres per hour into metres per second?
Put a ring around the correct answer.


50 000
50 000
50 000 x 3600
50 000 x 60

60
3600

[1]
© OCR 2009

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9
(c) Paul is travelling at 12 m / s when he slams on the brakes.
The speed of the car drops steadily to zero in just 3.0 s.
The car moves forwards by 18 m in that time.
Complete the distance-time graph for the car as it slows down.
The brakes are applied at 1.0 s.

[2]
(d) Why should Paul wear a seatbelt?
Put a tick ( ) in the box next to the correct answer.
A seatbelt increases the counter force on him in a crash.



A seatbelt transfers less energy to him as the car slows down.



A seatbelt increases the time it takes for him to slow down in a crash.



A seatbelt reduces the amount of momentum he needs to lose in a crash.


[1]

[Total: 5]
© OCR 2009

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8 Julie drops a brick into a deep well.

The brick falls through the air until it hits the water.
(a) Describe and explain the change of kinetic energy as the brick falls through the air.
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(b) The brick is moving at 30 m / s when it hits the water.
The mass of the brick is 2 kg.
The weight of the brick is 20 N.
How much kinetic energy does it have?
Put a ring around the correct answer.
30 J
60 J
600 J
900 J
9000 J

[1]
© OCR 2009

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