juc sec b (controlling variable)

8/7/2019 JUC Sec B (Controlling Variable)

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SET 1

Section B ( Controlling Variable )

1 Farah carried out an investigation on two objects in two different position.

Objects P and Q are of the same size, shape and material.

Sarah blows both objects slowly.It was found that P fall faster than Q

P Q

Based on the investigation, state the following :

( a ) What to change ( Manipulated variable )

……………………………………………………………………………..

( b ) What to measure ( Responding variable )

…………………………………………………………………………….

( c ) What to keep the same ( Controlled variable )

…………………………………………………………………………….



SET 1


2 Faizul is given a few objects by his teacher as shown below.

( a ) State two variables in the investigation.

i. ……………………………………………………………………

ii. ……………………………………………………………………

( b ) What is kept the same ? ( controlled variable )

……………………………………………………………………………



SET 1


3 These are Amin’s results :

Types of object Tissue paper Cotton Hand towel Sponge

Time taken to

absorb / second 5 15 23 40

( a ) Using Amin’s results, state the following variables :

i. What to changed ( Manipulated variable )

……………………………………………

ii. What to observe ( Responding variable )

…………………………………………….

iii. Two variables to keep the same ( Controlled variable )

…………………………………………………………….

……………………………………………………………..

SET 1




4 An experiment is carried to find out whether the height of an object affectsits stability.

Two wooden blocks are placed on a table. Then the table is shaken until bothwooden blocks fall down. The time taken for each wooden block to fall is

recorded in the table below.

Wooden blocks Height (cm) Time taken to fall

A 10 12

B 30 4

( a ) In this experiment, state the things that

i. is observed ( Responding variable )

……………………………………………

ii. is changed ( Manipulated variable )

…………………………………………..

( b ) State two variable that is kept the same ( Constant variable )

i…………………………. ii …………………………………..



SET 2


2 A group of pupils carries out an activity using model cars.

The bar chart below shows the information they have obtained.

( a ) State two variables in the investigation.( What to change and to measure )

i. ………………………………………………………………

ii. ………………………………………………………………

( b ) State one constant variable in the investigation. ( kept the same )

……………………………………………………………………….



SET 2


3 The Figure below shows an experiment done by a group of pupils. The trolley is

blown using a fan with 3 different speeds. The distance of the trolley for each speedis measured

( a ) Based on the investigation, state the following :

i. What to change ( Manipulated variables )

…………………………………………………………………..

ii What to observe ( Responding variable )

………………………………………………………………….

iii. Two controlled variable .( What to keep the same )

……………………………………………………………………

……………………………………………………………………….



SET 2


4 Figure below shows an investigation on the competition among snails.


1 Manipulated variables . ( What to change )

…………………………………………………………………..



…………………………………………………………………

ii. Responding variable . ( What to observe )

………………………………………………………………….

iii. Two controlled variable . ( What to keep the same )

…………………………………………………………………

……………………………………………………………………….



SET 3


1 10 ml of water is heated in a test tube and the temperature is measured for every 2 minutes

The heating is stopped after 6 minutes.

Observation :

Time ( minute ) 0 2 4 6

Water temperature ( o C ) 26 38 50 62

( a ) State the things that is to be controlled in the experiment.( What to keep the same )

………………………………………………………………………….

( b ) State two variables in the investigation.( is change and to measure )

i. ………………………………………………………………

ii. ………………………………………………………………



SET 3


2 A group of pupils carry out an experiment using the apparatus set up as shown

in the figure below. Three objects are placed into the hot water at the same time.

From the experiment,

( a ) State two controlled variable in the experiment. ( To keep the same )

………………………………………………………………………….

( b ) State two variables in the investigation.( To change and to measure )

i. ………………………………………………………………

ii. ………………………………………………………………



SET 3


3 Natasa carried out an activity using different measuring tools to measure the

length of the rod. His results were recorded in a table.

Measuring tools Matches Stick Nail

Plastic

ruler

(cm)

Metal

ruler

(cm )

Wooden

ruler

(cm )

Measurement 7 2¼ 12 13 13 13



…………………………………………………………………..

ii. What to measure ( Responding variable )

………………………………………………………………….

iii. Two controlled variable . ( To keep the same )

……………………………………………………………………

……………………………………………………………………….

juc sec b (controlling variable)

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