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To identify variables (things to change, keep

the same and to observe). The criteria are :

What To Change

What To Measure / Observe

CONTROLLING

VARIABLES

What Keep The Same

VARIABLES which things that are used duringfair test (experiment)

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Parameter ObjectsVolume of water

Size of sponge

Number of brick

Distance of toy car

Temperature of water

Type of soil

Except:

Time, Day, Week, Month and Year

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 PARAMETER OBJECT 

ShapeTemperature

HeightWeightVolumeThicknessColourThe number

LengthSize 

Variables about time can be made without parameter forexample : Month, Week, Year and Time

The rope

The ball

The water 

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What to change :

Kept the same :

30 g 45 g 60 g

The weight of the ball

The size of the ball

Ball P Ball RBall Q

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What to change :

Kept the same :

The height of the cylinder

The base area of the cylinder

Cylinder X Cylinder Y Cylinder Z

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Cooking oil Hair shampoo Vinegar

What to change :

Kept the same :

The type of liquid

The amount of the liquid // The size ofbeaker // The shape of container // Theheight of liquid

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What to change :

Kept the same :

The thickness of the rope

The length of the rope

Rope 1 Rope 3Rope 2

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What to change :

Kept the same :

The number of seeds

The type of seed // the size of container // theamount of soil // the type of soil 

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What to change :

Kept the same :

There is a hole in U, whereas no hole in T

Presence of air // Dragonflies U get air and Tnot get air

The type of dragonflies // the size ofcontainers // the type of container

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What to changed

What to measure

The Position of the sun

The length of the shadow // the directionof the shadow

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What to changed

What to measure

The method to plough

The time taken to plough

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What to changed

What to measure

The type of object

The rusty of object

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What to changed

What to measure

The type of plants

The type of dispersal way

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What to changed

What to measure

The amount of water

The time taken to toppled

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Battery

Bulb

Switch

Brighter3

Bright2

Dim1

Brightness of bulbNumber ofbattery

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46810The number ofswing(1min)

12cm9cm6cm3cmThe length of

string

3cm

6cm

9cm

12cm

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12

14

16

18

Number of 

marbles

Level of water / ml

WTM

WTC

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WTO

WTC

Rubber band Wooden block