ISLAMIYA ENGLISH SCHOOLPHYSICS WORKSHEET ON “EXPERIMENTAL SKILLS”

1.Complete the following sentences:a) Scientists gather evidence by collecting ____________.It should be both ____________and _____________.b)Reliable data is evidence that we can ______________.Valid data is evidence which is ______and also _________to the investigation.c)The variable that I can change deliberately is called the ____________variable.As a result the ____________variable changes.In a fair test it is important to ______________all the other ___________.d)The reliability of my results can be improved by ____________the measurement and then calculating the mean(or __________).e)An _______________instrument is one which gives readings close to the true value.A ________________instrument is one which gives readings which are grouped together.f)An usual reading which doesnot fit the pattern is called _______________.g)To see the pattern in my results I can draw a _____________with a ______________of best ___________.h)After drawing the graph,I should draw a ___________and also ____________the evidence.2.

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(Jan 2016 1p)3.A student investigates how the resistance of a wire depends on its length. The photograph shows the circuit that the student uses.

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(Jan 2013 1p)4. A student investigates the motion of a toy car as it moves freely down a slope.

The student wants to find the link between the starting height of the car and the speedof the car at the bottom of the slope.(a) (i) State the independent variable in this investigation.

(ii) Suggest a link between the starting height of the car and its speed at thebottom of the slope.

(b) Describe how the student should measure the starting height of the car.

(c) The student describes how she will find the speed of the car at the bottom of the slope.

(i) Explain why the student will not be able to calculate the correct speed usingthis method.

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(ii) Describe how the student should take the measurements needed to find thespeed of the car at the bottom of the slope.You should name any additional equipment needed.

(d) The student repeats the experiment using the same equipment and the same starting height.She finds out that the time taken for the car to move down the slope is notexactly the same for each experiment.Suggest three reasons why the student gets different results when she repeatsthe experiment.

Jan 2014 1p

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June 2012 2p

6. A student measures the length of a pencil.The photograph shows the arrangement she uses.

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June 2011 1p

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June 2011 1p

8. Two students, Jenny and Cho, are investigating motion. Jenny walks in a straight line. Cho measures the distance Jenny has walked at 10 s intervals. (a) State two measuring instruments the students should use.

(b) The table shows their measurements.

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Jan 2012 2p

9. A student measures the diameter of a coin. She uses the digital caliper shown in the photograph.

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June 2012 2p

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May 2013 1pr

11. An LED needs a minimum voltage to make it emit light. The student investigates this minimum voltage using the circuit shown.

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Display the results of the student’s investigation on a graph.

June 2013 2p

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May 2013 1p

13. A student investigates the vertical forces acting on the ends of a horizontal ruler when it supports a load.

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May 2013 1p

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June 2013 02 pr

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June 2016 1p

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June 2016 1p

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June 2016 1pr

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