Year 8 Science Sample Paper Jan 2012

7/18/2019 Year 8 Science Sample Paper Jan 2012

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SAMPLE ENTRANCE

EXAMINATION PAPER

For pupils currently in Year 8

SCIENCE(BIOLOGY, CHEMISTRY, PHYSICS)

Time: 1 hour

You should spend no more than 20 minutes on each section.

Answer all questions in the spaces provided.

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Science Department

13+ Entrance Examination Requirements

Candidates may be required to plot graphs and measure lengths and angles, so should bring apen, pencil, ruler, rubber and protractor to the exam.

Biology

Cells

Plant and Animal Reproduction

Ecology

Variation and Classification

Chemistry

Acids and Alkalis: acids and alkalis, indicators, pH, everyday applications

Physical Separations and Changes: filtering, evaporation, distillation, fractional

distillation, chromatography, states of matter, changes of state, effect of impurities,

diffusion

Chemical changes and corrosion: thermal decomposition, burning and oxidation,

rusting, precipitates and effervescence

Elements, Compounds and Mixtures: atoms and symbols for elements,

compounds/mixtures, interpretation of formulae, pigments and colloids

Physics

Light and sound, including reflection and refraction

Satellites and the Solar System

Forces

Speed

Electric circuits

Electromagnets

Energy changes



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B I O L O G Y

B1. a] Plot the following data on a separate sheet of graph paper. Age is given in years, height in cms.

Age Average height boys Average height girls0 50 50

2 92 92

4 103 103

6 117 115

8 130 128

10 140 138

12 149 151

14 162 159

16 171 161

18 174 162 [6]

b] Between which ages is growth fastest in:

[i] girls? ______________________________

[ii] boys? ______________________________ [2]

c] At twelve years which sex is taller on average?

_____________________________________________

Why is this?

________________________________________________________ [2]



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B2. Body proportions change as a baby grows to be a child and then an adult.

a] What proportion of a newborn baby's total height is represented

by the head?

______________________________________________________ [1]

b] What proportion of an adult's height does the head represent?

______________________________________________________ [1]

B3. What is meant by:

a] ovulation? _____________________________________

b] fertilisation? _____________________________________

c] menstruation? _____________________________________

d] menopause? _____________________________________ [4]



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B4. a] What are gametes?

______________________________________________________ [1]

b] Where are the gametes produced in a man?

______________________________________________________ [1]

c] Where are the gametes produced in a woman?

______________________________________________________ [1]

B5. An experiment was set up to investigate starch production in four plants. All the plantswere placed next to a continuous light source. Plants A-C were enclosed in clear plasticbags. Plant D was enclosed in a black plastic bag. In all cases, the soil in which the plants

were placed was enclosed in a sealed plastic bag. Soda lime removes carbon dioxidefrom air.

After three days a leaf from each plant was tested using iodine solution.

Complete the table of results to explain the findings.

Plant Starch present? Explanation of result

A

B

C

D

Yes

No

No

No

[8]



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B6. Use the information in the following passage of text to answer the questions below.

Rabbits live in burrows in open woodland or grassland. The burrows are usually in light,sandy soil and consist of connecting tunnels with several entrances. Rabbits usually onlycome out of their burrows at night or in the early morning or late evening to feed on grass,seeds, leaves and young bark. A disturbed rabbit will flash the white underside of its tail asit bounds away from danger. This acts as a warning signal to other rabbits.

Rabbits eat their own pellets of solid waste material (faeces) which they produce at night.It seems that the pellets are a good source of B vitamins which are produced by microbesin the gut.

In good years rabbits produce 3-6 litters of young from March to September. Each littercontains 3-7 young. The young develop inside the mother for about 4 weeks and are bornblind. They are suckled for about 4 weeks and during this time also feed on their mother'swaste pellets. The young become sexually mature at around 6-8 months old. They canlive up to ten years old, but because of predation by foxes, birds of prey and humans, anddisease such as myxomatosis, their lifespan is usually about a year.

a] Give two ways in which rabbits are able to avoid beingeaten by predators.

1 _________________________________________________

_________________________________________________

2 _________________________________________________

_________________________________________________ [2]

b] Give two ways in which a female rabbit helps her youngsurvive the first few weeks.

1 _________________________________________________

_________________________________________________

2 _________________________________________________

_________________________________________________ [2]

c] In a good season, a female rabbit can produce as many as 25-30 young.Give two reasons why the countryside isn't completely overrun with rabbits.

1 _________________________________________________

_________________________________________________

2 _________________________________________________

_____________________________________________________ [2]



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C H E M I S T R Y

C1.

Turn-over



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C2.



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C3.

(iii) State one thing the farmer must do when sampling his soil from a large fieldto make sure that his results are reliable.

……………………………………………………………………………………..… (1)

Turn-over



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C4.

[Type a quote from the document or the summary of an interesting point. You can position the text box

anywhere in the document. Use the Text Box Tools tab to change the formatting of the pull quote text

box.]

Turn-over

C4.



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C5.



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Turn-over



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(c) When sulphur burns in air, a chemical reaction occurs.

(i) How can you tell from this diagram that sulphur is an element?

……………………………………………………………………………………. (1)

(ii) Suggest the name of the product of this reaction.

…………………………………………………………………………………….. (1)



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P H Y S I C S

P1. a] The diagram shows Alan sitting on a ride at a theme park.

[i] Which arrow shows Alan’s weight?

______________________ [1]

[ii] Alan begins to move forward. Which arrows show the forcewhich makes Alan move faster?

______________________ [1]

b] During the ride, Alan is upside down.

Draw an arrow on the diagram to show the direction of Alan’s weight while he is upside down. [1]



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P2. James’s coin has rolled under a cupboard. It is dark under the cupboard, and he cannot see the coin even though the light is on.

a] Explain why a shadow forms under the cupboard.

__________________________________________________________

__________________________________________________________ [1]

b] James uses a mirror to shine light from the light bulb onto the coin.He holds the mirror so that it touches the floor at point X.

(i) The symbol for a mirror is

Copy the symbol onto the diagram at point X to show the correct anglefor the mirror. [1]

(ii) On the diagram, draw the ray of light from the bulb to the coin.Draw an arrow on the ray to show which way the light is travelling.Use a ruler. [2]

(iii) Use the correct word to complete the sentence.

At the mirror, the light is ______________________________ [1]



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P3. a] The diagram shows a circuit with a cell, three switches labelled A, B and Cand three lamps labelled 1, 2 and 3.

[i] Which lamp or lamps will light up when switch A is closed and switches Band C are open?

__________________________________________________________ [1]

[ii] State whether each switch is OPEN or CLOSED when all of the lamps areon.

A _________________________

B _________________________

C _________________________ [3]

b] Emily wishes to set up a circuit to measure the current flowing in a resistor.These are the components that she uses:

Draw a diagram, in the space below, of the circuit she should set up. [2]



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P4. Regulus is a bright star in the constellation Leo. In February, an astronomervisited a country close to the equator. While she was there she observed Regulus.

a] During the night, Regulus appeared to move across the sky.

[i] Why do starts appear to move across the sky?

__________________________________________________ [1]

[ii] Choose from the words below to complete the sentence.

north east south west

Regulus appeared to move across the sky from

________________________ to _______________________ [1]

b] The diagram below shows the position of the Earth and the Sun whenthe astronomer made her observations. She noticed that Regulus wasdirectly overhead at midnight. On the diagram, draw an arrow from theEarth to show the direction in which she looked to see Regulus.

[1]

c] Six months later, in August, Regulus cannot be seen at any time.Explain why.

_______________________________________________________

_______________________________________________________ [1]



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P5. The table gives the densities of several different substances.

substance density (g/cm3)

cork 0.25

glass 2.5

gold 19.3

lead 11.4

mercury 13.6

oak 0.8

platinum 21.45

tin 7.3

water 1.0

Substances float in a liquid if they are less dense than the liquid.

a] Which two of these substances float in water?

______________________________________________________ [2]

b] Which two of these substances sink in mercury?

______________________________________________________ [2]

c] You are given 1 g of each substance. Which has thesmallest volume?

_______________________________________________________ [1]

d] You are given 1 cm3 of each substance. Which has thesmallest mass?

_______________________________________________________ [1]

e] Calculate the mass of a 20 cm3 lump of gold.

_______________________________________________________ [2]



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P6. The map below shows part of a shopping centre.

A robber leaves a bank in Main Street. A policeman standing in Cross Lanesees the robber by reflection in the mirrored window of the supermarket.

a] On the diagram draw the light rays from the robber to the policeman. [2]

b] What is the street number of the bank? ______________ [1]

c] On the diagram, mark where the bank appears to be to the policeman.(The image of the bank) Mark this position "B". [1]

END OF SAMPLE PAPER



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Documents

Year 8 Science Sample Paper Jan 2012