Fingerprint and Marks Essays

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SCIENCE TEACHER: (circle code)

10A

SCIENCE
Year 10 Examination 2012
10A – 40 marks
Make sure that you have answered all the questions in paper 10B before you start this paper
Time allowed for both examinations: 2 hours

Answer all questions in the spaces provided on the paper.
Show all your working in calculations; marks are awarded for it.
Give units for all answers (eg kg or m) unless they are already provided.

For Teacher Use

Question
Marks
gained
Marks
available

1

2

3

4

5

6

7

8

9

10

11

Total

2

5

5

4

2

3

4

5

4

3

3

40

Question One: Energy [2 marks]

The drawing shows a television set.

Use these words to complete the sentences below. electrical  heat  light  sound
The television is designed to transform (convert) ______________ energy into______________ energy at the screen.
The loudspeaker transforms kinetic energy into ______________ energy.
Some energy is wasted as ______________ .
Question Two: Forces [5 marks]
(a) Alice goes skydiving. This diagram shows two forces acting on her as she falls.

Which statement is correct? (Tick one)

 force P is gravity and force Q is air resistance
 force P is air resistance and force Q is gravity
 force P is gravity and force Q is acceleration
 force P is acceleration and force Q is air resistance
(b) A pole vaulter wants to find out which material is best for making a landing surface.

Four materials are tested in a lab.
• A dummy body is dropped onto each surface.
• It is dropped from the same height each time.
• The maximum force on the dummy is measured for each surface.

Force (N)

The graph shows the maximum force exerted by the different surfaces.

surface material
(i)

Which material should be used for the landing surface?

Explain your answer.

(ii) Why is the height kept the same each time?

The experiment is repeated with a lighter dummy.

(iii) Will the maximum force on the dummy increase, decrease or stay the same?
Circle your answer. increase  decrease  stay the same
Explain your answer.

Question Three: Electricity and magnetism [5 marks]
(a) Here are three simple circuit diagrams.

Which circuit (A, B or C):
(i) will have the brightest bulbs? ____________
(ii) does not allow the bulbs to light? ____________
(b) If one bulb goes out in circuit B, what will happen to the other bulb?

(c) Modern Christmas tree lights are usually connected in parallel.
Explain how this is an advantage.

(d) A bar magnet has been glued to the top of the toy plastic car.

(i)

What would happen if another bar magnet was moved towards it, as shown in the diagram? The toy car would (tick one)

 Stay where it is
 Move forwards (right)
 Move backwards (left)
 Turn around
(ii)

Why was a plastic car used in this experiment and not a metal car?

Question Four: Crime Lab [4 marks]
Finger prints are often left at a crime scene.
(a) Fingerprints can be sorted into three types.
Draw a straight line from the fingerprint to its correct type.

finger print

type
• Loop




• Arch
• Whorl

(b) Finish the sentences by choosing the best word from the list.

dust  fats  oils  nails  wipe
Fingerprints can get onto surfaces when __________________ from the skin are left.
Special powder can be used to ___________ for fingerprints.
(c) What two things you must do to make a record of your fingerprints? Put ticks in the boxes next to the two correct statements.

 Dip your finger in salt crystals
 Push your finger onto an ink pad
 Roll your finger onto white paper
 Wrap filter paper around your finger
(d) At the crime scene, the police take fingerprints form innocent people. Why do you think this is done?

Question Five: Earth Science [2 marks]
This picture shows an active volcano.
The liquid rock from the mantle is erupting from the volcano.
It is causing a lot of damage.
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