# Science Paper 2 - Teachers Hub University of Cambridge International Examinations is part of the Cambridge

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45 minutes

Science Paper 2 Stage 5 Name ………………………………………………….………………………. Additional materials: Ruler READ THESE INSTRUCTIONS FIRST Answer all questions in the spaces provided on the question paper. You should show all your working on the question paper. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 50.

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• © UCLES 2011 P840/0/A/M/11

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1 Different seeds are dispersed in different ways.

Draw a line from each seed to the way of dispersal.

seed seedway of dispersal

animals

explosion

wind

[3]

• © UCLES 2011 P840/02/A/M/11 [Turn over

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2 Children in Class 5 leave water in four beakers. The water is all at the same temperature. Here are the four beakers. Look at beakers A and B.

A B

All the water will evaporate first in beaker .

Look at beakers C and D.

C D

All the water will evaporate first in beaker .

[1]

• © UCLES 2011 P840/0/A/M/11

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3 These statements are about the Earth and the Sun. Decide if each statement is true or false. Draw a line between the statements and the correct box.

[3]

true

false

The Sun is smaller than the Earth.

The Earth takes a year to move around the Sun.

Shadows are shortest at midday.

The Earth takes 12 hours to spin all the way round.

The Sun takes 24 hours to orbit the Earth.

• © UCLES 2011 P840/02/A/M/11 [Turn over

5

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4 One of the life processes is reproduction. (a) Which part of the plant is needed for reproduction? Tick (�) the correct box.

[1] (b) Complete the sentence about seed production. Choose words from this list.

nectar ovum pollen stamen

Seeds are formed when the from the male organ

fertilises the , which is the female sex cell. [2]

flower

leaf

stem

root

• © UCLES 2011 P840/0/A/M/11

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5 Angel and Pepe investigate the effect of light on the germination of seeds.

They discuss how to do their investigation. They have five ideas. A Give all the seeds the same amount of water. B Plant some seeds very deep and some near the surface. C Don’t water some of the seeds. D Plant all seeds 1cm deep in the soil. E Put most of the seeds in the dark and just one in the light. (a) Which two ideas will make the investigation a fair test? Choose from A, B, C, D and E.

and [1]

• © UCLES 2011 P840/02/A/M/11 [Turn over

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(b) Angel puts his pot, with 10 seeds in it, in the dark. Pepe puts his pot, with 10 seeds in it, in the light. They count the number of seedlings that have grown. Here are their results. Complete the table to show how many seedlings germinated.

time in days number of

seedlings in the dark

number of seedlings in the

light

2

4

6

8

10

[2] (c) Write a conclusion for Angel and Pepe’s investigation.

[1]

After 2 days no seedlings in the dark, no seedlings in the light.

After 4 days 1 seedling in the dark, no seedlings in the light.

After 6 days 4 seedlings in the dark, 3 seedlings in the light.

After 8 days 8 seedlings in the dark, 7 seedlings in the light.

After 10 days 10 seedlings in the dark, 10 seedlings in the light.

• © UCLES 2011 P840/0/A/M/11

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6 (a) Complete the sentences below. Choose words from the list.

absorbent blocked opaque

reflective translucent transparent What is the name given to objects which:

allow lots of light to pass through them?

allow no light to pass through them?

allow some light to pass through them?

[3]

• © UCLES 2011 P840/02/A/M/11 [Turn over

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(b) Davina is standing in the Sun. Diagrams A, B and C show Davina and her shadow. The arrow on diagram A shows the direction of the Sun’s rays. The shadows for diagrams B and C are in different places.

A

B C Draw an arrow on diagram B to show the direction of the Sun’s rays. Draw an arrow on diagram C to show the direction of the Sun’s rays.

[2]

• © UCLES 2011 P840/0/A/M/11

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7 Sheila and Bob heat water from room temperature until it boils. They measure the temperature of the water every minute. They plot a graph of their results.

temperature /°C

110

20

time/minutes B

120

20

temperature /°C

time/minutes A

100

20

temperature /°C

105

20

temperature /°C

time/minutes C

time/minutes D

(a) Which graph shows their results? Choose from A, B, C or D.

[1]

(b) What was room temperature?

°C [1]

(c) What happens to the volume of water as the water boils?

[1]

• © UCLES 2011 P840/02/A/M/11 [Turn over

11

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8 Aravinder investigates light from a torch shining on a mirror. The diagrams show what he does. (a) On each diagram circle the number which shows the reflected ray

of light.

1

2

3

1 2 3

1 2

3

[2] (b) Complete these sentences using the words shown.

direction dull shape shiny speed

When a beam of light hits a mirror it changes .

Reflections can be seen in surfaces which are .

Cardboard does not reflect light because it is .

[2]

• © UCLES 2011 P840/0/A/M/11

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9 Two changes of state are condensation and evaporation. Draw a line between each change of state and what it means. change of state what it means

[2]

condensation

gas turning into a liquid

gas turning into a solid

liquid turning into a gas

liquid turning into a solid

solid turning into a gas

solid turning into a liquid

evaporation

• © UCLES 2011 P840/02/A/M/11 [Turn over

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10 Here is a word tree. Five words have been made in the word tree. Each word uses one letter from the word fertilisation.

1 f

e

2 d r l

t

3 i

l

i

s

4 g e r m i n a t i o n

t

5 i

o

n

Read each of the clues and complete the words 1–5 in the word tree. Clue 4 has been done for you. Clue 1 It contains seeds and can be very tasty. Clue 2 The spreading around of seeds.

Clue 3 The movement of pollen from the male part of the flower to the female part of the flower.

Clue 4 When seeds start to grow. Clue 5 They carry pollen from one plant to another.

[4]

• © UCLES 2011 P840/0/A/M/11

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11 Rukmal and Rohini investigate some factors that affect the evaporation of water. Here is their apparatus.

(a) Write one factor they change in their investigation.

[1]

(b) Write one factor they keep the same in their investigation.

[1]

(c) After 5 days they look at the beakers and record their results in the

drawings below.

Rukmal and Rohini write a conclusion from their results. Complete their conclusion.

The the temperature, the

the water evaporates. [1]

beaker A kept at 7oC

beaker B kept at 17oC

beaker C kept at 27oC

beaker B kept at 17oC

beaker C

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