2000 science paper a - qwizdom ppt

2000 SCIENCE PAPER A

An Interactive Qwizdom Test

2000 Science Paper A2000 Science Paper AInput your name and press send.Input your name and press send.

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Water(a) Scott has a plastic bottle with water in it.

He wants to freeze the water by putting the bottle in a freezer.Complete the labels by writing solid or liquid in each box.

(i) The bottle before going into the freezer.

2000 Science Paper A Q12000 Science Paper A Q1

bottle

water

Solid

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Water(a) Scott has a plastic bottle with water in it.

He wants to freeze the water by putting the bottle in a freezer.Complete the labels by writing solid or liquid in each box.

(ii) The bottle just after being in the freezer for 24 hours..


Solidbottle

ice

Solid

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Materials(a) Sarah and Rob are investigating the properties of materials.They compare wood, steel, paper, wax, aluminium and copper.

They use a key to sort the materials.Complete the key by chosing wood, steel, paper and wax in the correct answer boxes at the bottom of the key.Use each word once.You may put more than one word in an answer box.

D oes it conduct e lectr ic ity?

Is it a ttracted to a m agne t? D oes it m e lt?

aluminiumcopper

Yes

Yes N o Yes N o

N o

1 2 3

1 =

A. Wood

B. Steel

C. Paper or

D. Wax

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aluminiumcopper

Yes

Yes N o Yes N o

N o

1 2 3

2 =

A. Wood

B. Steel

C. Paper or

D. Wax

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aluminiumcopper

Yes

Yes N o Yes N o

N o

1 2 3

3 =

A. Wood

B. Steel

C. Paper or

D. Wax

Smoking and Health(a) Gary and Jessica are learning about the harmful effects of smoking.They read the warning on a packet of cigarettes.How can smoking affect your lungs?


(b) Gary and Jessica ask four adults about their lifestyles.The table shows what they find out.

Name Smokes Has healthy diet

Takes regular exercise

Sanjay No Yes Yes

Carl Yes Yes Yes

Fatima No Yes No

Helen Yes No No

Which adult listed in the table is most likely to develop heart disease?

A. Sanjay

B. Carl

C. Fatima

D. Helen

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Smoking and Health(c) This graph shows how the number of adults smoking changed between 1974 and 1994.


(i) Use the graph to describe the change in the number of adults who smoked between 1974 and 1994.

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Number ofadults who

smoke(%)

6 0

5 0

4 0

3 0

2 0

1 0

019 7 4 1 9 7 6 1 9 7 8 19 8 0 1 9 8 2 1 9 8 4 1 98 6 1 9 8 8 1 9 9 0 1 99 2 1 9 9 4

xx x x

x x x x xx x

Year

(ii) Give ONE possible reason for this change.

Sounds(a) John makes a musical instrument using 5 sticks and a

block of wood.


To make a sound, he pushes a stick down and lets it go.Explain why the stick makes a sound.

(b) How can he make the sound louder?

1 2 3 4 5

(c) John finds that stick 5 makes the highest note.Describe how the length of the stick affects the pitch of the note.

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Sounds(d) Susan puts her ear on the plastic table as John makes a sound.She hears the musical instrument.It sounds louder.Complete the sentence below to explain how the sound reaches Susan's ear.The sound travels through…


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A. air only.

B. wood and air only.

C. wood, air and plastic.

D. wood only.


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Heart RateJim uses a sensor to measure his heart rate before he starts running.

He starts running and measures his heart rate every five minutes.After his run, he draws a graph.

Heart rate(beats per

minute)

140

120

100

80

60

40

20

00 5 10 15 20 25 30 35

X Y

Time (minutes)

Use the graph to help you answer these questions.(a) What is Jim's heart rate before he starts running?


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Heart rate(beats per

minute)

140

120

100

80

60

40

20

00 5 10 15 20 25 30 35

X Y

Time (minutes)

(b) What happened to Jim's heart rate in the first five minutes that he was running?

(c) Describe Jim's heart rate between points X and Y on the graph.

Shadows(a) Two children hold some objects between a lamp and the wall.


They see that cardboard makes a dark shadow and a plastic sheet makes a faint shadow.Explain why the shadows are different.

(b) Which TWO objects will make a faint shadow.

A. A wooden toy

B. A piece of tracing paper

C. A book

D. A mirror

E. A clear plastic cup

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Shadows(c) Kelly is drawing around Peter's shadow.


A. move closer to the paper

B. use a bigger lamp

C. move the lamp closer

D. move closer to the lamp

E. use a brighter lamp

F. move the lamp further away

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How could Peter make the shadow of his head bigger? Choose TWO actions.

(d) Explain how Peter's shadow is formed on the paper.

Growing Seeds(a) Martin and Jane are growing seeds.


What ONE thing all the seeds must have to start to grow.

A. light B. salt C. water D. soil

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Growing Seeds(b) The seeds start to grow.Martin covers the seedlings with a polythene bag. Jane covers her seedlings with black paper.


After a few days the leaves of Jane's seedlings are yellow.Why do the seedlings under the black paper have yellow leaves?

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(c) Martin's seedlings grow strong and healthy leaves.Explain why the leaves are important to a plant.

Growing Seeds(d) Martin measures the roots of his pea seedlings.

Graph to show rate of growth of roots


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Length ofroot (mm)

50

40

30

20

10

00 4 8 12 16 20 24

Day

Look at the graph.When are the roots growing fastest?

A. day 0 to day 4 B. day 8 to day 12 C. day 16 to day 20 D. day 20 to day 24

Water and Salt(a) Kiran puts 50cm3 of water in a plastic beaker.He puts it in a freezer.


He looks at the freezer thermometer.What is the temperature in the freezer?

….. °C

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Water and Salt(b) The water in the beaker turns to ice.Kiran takes the beaker out of the freezer.He puts it into a fridge.The diagrams show what happened.


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beaker ofwater

w ater tu rns to ice

ice melts

freezer fridge

Why did the ice in the beaker melt in the cold fridge?

A. the fridge was colder than the roomB. there was less food in the fridge C. the fridge was bigger than the freezer D. the fridge was warmer than the freezer E. there was more air in the fridge

(c) Kiran puts 50cm3 of water in another beaker.He adds 5g of salt.What happens to the salt when Kiran mixes it with the water?


(d) Kiran leaves the beaker with water and salt in a warm place for a week.

Complete the following sentence to describe what happens to the water.(i) The water

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(c) Kiran puts 50cm3 of water in another beaker.He adds 5g of salt.What happens to the salt when Kiran mixes it with the water?


(d) Kiran leaves the beaker with water and salt in a warm place for a week.Complete the following sentence to describe what happens to the water.

(i) The water evaporates away.(ii) The salt will form c _ _ _ _ _ _ s in the beaker

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Flowers and BeesKate and Simeon want to find out which

colour flowers bees will visit most. They make model flowers of different colours.


Bees feed on nectar from flowers.Kate and Simeon make their own nectar

using 40g of sugar and 100cm3 of water.They put 10 drops of nectar in the centre of

each model flower

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They put their flowers outside then count the bees that visit the flowers.They keep a record of the weather for each hour.

Flowers and Bees(a) Here are the children's results.


Which colour of flower do the bees visit most?

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Colour offlower

Number of bees each hour

red 4 3 2

blue 8 6 3

w h ite 4 4 1

ye llow 6 5 2

9am–10am 10am–11am 11am–12noon

sunny cloudysunny andcloudy

(b) Use the information on the table to say how the amount of sunshine affects the number of bees that visit the flowers. (2 marks)

(c) Write TWO things that the children could keep the same to help make their test fair. (2 marks)


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Temperature Sensor(a) In December, Jenny and Jayesh want to find out how the temperature inside and outside their classroom changes overnight.

They connect two temperature sensors to their computer.They place one sensor on the table in their classroom and put one outside the window.This is the line graph that was recorded by the computer.

Temperaturein °C

Time in hours

Temperature change overnight

24

22

20

18

16

14

12

10

8

6

4

2

0

–2

–4

–611am 1pm 3pm 5pm 7pm 9pm 11pm 1am 3am 5am 7am 9am 11am

sensor A

sensor B

In degrees Centigrade, what was the highest temperature recorded?


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Temperature Sensor(b) Which sensor was placed inside on the classroom table?

Temperaturein °C

Time in hours

Temperature change overnight

24

22

20

18

16

14

12

10

8

6

4

2

0

–2

–4

–611am 1pm 3pm 5pm 7pm 9pm 11pm 1am 3am 5am 7am 9am 11am

sensor A

sensor B

(c) The TV weather forecast predicted the coldest overnight temperature would be –2°C.The forecast was not correct.What information on the graph shows that the forecast is not correct?

A. Sensor

B. Sensor

Explain how you know which sensor was inside.


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Parachutes(a) Some children make four paper parachutes.

Each parachute has a different sized canopy.

They drop each parachute from the same height.They measure how long it takes each parachute to reach the ground.Here is a table of their results.

Parachute Size (area) of canopy (cm2) Time to reach ground(seconds)

A 100 1.0

B 400 2.0

C 625 2.5

D 900 3.0

Which parachute took the longest time to reach the ground?


End of show

Parachutes(b) The picture shows two forces acting on a parachute as it falls.What is the name of the force up?(Clue 2 words)

Parachute Size (area) of canopy (cm2) Time to reach ground(seconds)

A 100 1.0

B 400 2.0

C 625 2.5

D 900 3.0

force up

force dow n

(c) Look at the table of results.Describe how the time taken to reach the

ground depends on the area of the canopy.(2 marks)

2000 science paper a - qwizdom ppt

Documents

science paper

page water

page b

page air

black paper haveyellowleaves

piece of tracing paper

wood steel paperor wax

page heart rate jim