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Year 10 Science sample

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Question 1 of 5 Observing and measuring

During a wet weather lunchtime, two students test how quickly they react by catching a ruler dropped without warning. Noah catches it after it has fallen 30 cm. Zara catches it after 150 mm. Who reacted sooner, and by how much?

Catch distance and the time it stands for
Distance the ruler fellReaction time
5 cm0.10 s
10 cm0.14 s
15 cm0.17 s
20 cm0.20 s
25 cm0.23 s
30 cm0.25 s
Question 2 of 5 Energy and change

A depth sounder on a harbour launch in Moreton Bay sends a short burst of sound straight down and picks up the echo 200 milliseconds later. The sounder head is bolted 4 m below the water surface. How deep is the sea floor below the surface?

Sounding the sea floorsurvey boatwater surfacesea floorpulse down, echo upecho after 200 mshead 4 m under the surfaceThe echo reached the sea floor and came back again.
Question 3 of 5 Earth and beyond

The roof of a school shelter at Toowoomba measures 16 m by 6 m as seen from above, and every drop that lands on it runs into one tank. A storm drops 45 mm of rain. How much water runs out of the overflow pipe?

Roof, downpipe and tankroof catches the rainrainwater tankrain 45 mmtank holds 5000 Lin it now 3700 LThe roof size is given in the question.
Question 4 of 5 Natural and processed materials

A class runs a chromatography test on the colour in a cordial. The pencil line is drawn 30 mm up from the bottom edge of the paper. When the run is stopped the solvent front sits 100 mm up from that same bottom edge, and the centre of the single spot sits 65 mm up from it. Which dye made the spot?

Reference dyes measured in this solvent
DyeRf in this solvent
erythrosine0.10
tartrazine0.20
sunset yellow0.35
allura red0.50
brilliant blue0.65
green S0.80
Question 5 of 5 Interpreting

A student wears a heart rate strap through a step test in the sports hall. The trace runs from the minute before the work started to well after it finished. How long after the work stopped did the heart rate first come back to within 10 beats a minute of its resting value?

Heart rate through the session036912155075100125150175Time from the start, in minutesHeart rate, beats a minuteMinute zero is the reading before the workPoints are plotted one minute apartThe recovery is counted from the top of the trace.
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