Read the whole question, including any table or graph. Try it from memory first. Only open the hint if you are stuck.
Spend about one minute on each mark. Write one science point for each mark.
Look at the command word. Explain: say what happens and why, joining ideas with “because” or “so”. Compare: say something about both things.
Tick only as many boxes as the question asks for: an extra tick loses a mark. In a calculation, show your working and give the unit.
Press Mark, then check your answer against every marking point. Use − / + to set the mark you think you earned.
The suggested mark is a careful word match, not a teacher’s mark. If you said the same science in different words, give yourself the mark.
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WS Exam Question Practice
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SCIENCE · WS
Working Scientifically
53 questions · 256 marks, in lesson order.
01WS.1Explain3 marks
Introduction and safety
Exam question
Mark points shown after marking
Maya tests whether light affects how much a plant grows. She writes a method (the steps she follows) and a conclusion (her answer to the question). Answer the parts below to explain why she needs both.
(a)
What is a method?
(1)
(b)
Maya’s method is clear. Why does a clear method help someone else? Start: “A clear method tells someone else exactly what to do, so they can …”
(1)
(c)
Maya’s conclusion uses her results. Why is this important? Start: “Using the results means the conclusion is …”
A student needs to measure about 9 mL of liquid. They can use a 10 mL measuring cylinder with marks every 0.2 mL, or a 100 mL beaker with marks every 20 mL. Answer the parts to justify choosing the cylinder.
(a)
Is 9 mL inside the range of the cylinder (the smallest to biggest value it can measure)? Explain.
(1)
(b)
Compare the gaps between the marks (the scale divisions) on the cylinder and the beaker.
(1)
(c)
Why does this make the cylinder the better choice? Start: “Smaller gaps between the marks mean …”
The thermometer below can be used to measure the temperature of the human body.
Scale from 35 °C to 42 °C
(a)(i)
What is the lowest temperature this thermometer can measure?
(1)
°C
(a)(ii)
What is the normal temperature of the human body?
(1)
(a)(iii)
A nurse can measure a child’s temperature with a glass thermometer or a plastic strip thermometer. Give one reason why the plastic strip is safer.
(1)
(c)(i)
Alcohol (colourless, boiling point 78 °C) and mercury (shiny grey, boiling point 357 °C) can be used in thermometers. A red dye is added to the alcohol. Suggest why.
(1)
(c)(ii)
Choose from gas, liquid and solid to fill the gaps.
(2)
When alcohol and mercury boil they both change from a liquid to a . A mercury thermometer can measure the temperature of an oven at 150 °C because mercury is a at 150 °C.
Simon made two candles from the same amount of wax and drew lines on both: candle 1 is a cylinder and candle 2 is a cone. The lines on candle 1 are equally spaced; the lines on candle 2 divide its height equally.
Lines A to E on each candle
(a)
What would Simon use to measure the distance between the lines?
(1)
(b)(i)
Candle 1 took 30 minutes to burn from A to B, 30 minutes from B to C and 30 minutes from D to E. How long would it take to burn from C to D?
(1)
minutes
(b)(ii)
Candle 2 took 20 minutes to burn from B to C and 40 minutes from C to D. Which is the most likely time for A to B?
(1)
(b)(iii)
Which is the most likely time for candle 2 to burn from D to E?
(1)
(c)
Candle 3 is the same size as candle 1 but has more lines. Why is candle 3 more useful for measuring time?
On 7th September 2001, at 11.00 am, over a million pupils jumped up and down at exactly the same time. Sensors measured the vibrations caused by the jump. Before they jumped, four pupils said: “Trees will shake.” “The ground will vibrate.” “Dogs will bark.” “Walls will collapse.”
(a)
What type of statement did the pupils make?
(1)
(b)
Sensors at different places recorded the vibrations of the ground. Why was it important that all the pupils jumped together?
(1)
(c)(i)
Carol said, “When pupils jump, only the ground nearby will vibrate.” Describe how the evidence in the recordings supports Carol’s idea.
(1)
Vibration against time at three places
(c)(ii)
Suggest one reason for the difference between the readings of sensor A and sensor B.
Scientific investigations: independent, dependent and control variables
Exam question
Mark points shown after marking
Joe wanted to know whether the length of a swing’s chains or the mass of the person affects the time for one complete swing. He made model swings from string and plasticine and timed 10 complete swings in four investigations.
Joe’s results
investigation
length of string (cm)
mass of plasticine (g)
time for 10 complete swings (s)
A
25
100
10.0
B
25
50
10.0
C
50
100
14.2
D
75
100
17.4
(a)
Joe concluded: “Changing the mass of the plasticine has no effect on the time taken for 10 complete swings.” Which two investigations provide evidence for his conclusion?
(1)
(b)(i)
Describe how the length of the string affects the time for 10 complete swings.
(1)
(b)(ii)
Which three investigations are the best evidence for this?
(1)
(c)
Joe plans two more investigations. E: length 25 cm, mass 25 g. F: length 100 cm, mass 100 g. Which predictions for the time for 10 swings are sensible? Tick one box for E and one box for F.
Scientific investigations: independent, dependent and control variables
Exam question
Mark points shown after marking
Alan and Aysha saw a poster claiming that Glossy washing-up liquid makes more bubbles than other washing-up liquids. They added each of three washing-up liquids to water in a test-tube and shook it.
(a)
What would they see if their results supported the claim on the poster?
(1)
(b)
Why should they use the same volume of washing-up liquid in each test-tube?
(1)
(c)
The first time they tried, all three liquids made bubbles that reached the tops of the test-tubes. Why was this a problem?
(1)
(d)
Jane repeated the investigation with less washing-up liquid in each test-tube. Shine made the highest column of bubbles, then Glossy, then Fresh. Her results supported her prediction about Shine. What was Jane’s prediction?
