Technique For Section B Mgc

TESTED S.P.S OBSERVATION INFERENCE CONTROLLING VARIABLES 1. WHAT TO CHANGE (CV) 2. WHAT TO MEASURE (OV) 3. WHAT KEEP THE SAME

TESTED S.P.S MAKING A HYPOTHESIS RELATIONSHIP INTERPRETING DATA 1.TREND / PATTERN 2. AIM / PURPOSE 3. PREDICTION 4. CONCLUSION

STATEMENT

DIAGRAM

SECTION B

GRAPH

TABLE

STATEMENT

A group of pupils doing a fair test. They measured 10 ml of water in a measuring cylinder. When they put marbles the level of water will rise up. When they put one marble the level of water is 12 ml, two marbles 14 ml, three marbles 16 ml and four marbles 18 ml.

NUMBER OF MARBLES LEVEL OF WATER / ml

1 2 3 4

12 14 16 18

TABLE CV

Number of marbles

OV MV

Level of water / ml 12 14 16 18

GRAPH Level of water / ml

OV/MV

18 16 14 12

Number of marbles

CV

DIAGRAM 14 12 10

16

18

CV Number of marbles

OV Level of water / ml

CONTROLLING VARIABLES 1. WHAT TO CHANGE (CV) 2. WHAT TO MEASURE / OBSERVE (OV / MV) 3. WHAT KEEP THE SAME (KS)

1.

2.

3.

Number of eggs

Weight of eggs/ gram

100 200 300

Number of marbles 0 1 2 3

Level of water / ml 10 12 14 16

Number of bricks The distance of the toy car / meter 1

1

2

2

3

3

C

B

A

The height of the ball fall/ cm

Numbers of bounces made

20

10

30

20

40

30

30 minutes

35 minutes

40 minutes

Size of the paracutes Time taken to land / minutes

Small

30

Medium

35

Large

40

FROM THE GRAPH Volume of water collected (ml) (OV) 35 30

-

25 20

Ais

15 10 5 0 4

6

8

10

Number of ice cubes (CV)

12

Screen Object

Shadow

Torch light

The dictance of the object from torch light / cm

Size of the shadow

10

Large

15

Medium

20

Small

Parameter

Objects

Volume 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

1) RELATIONSHIP / As the

CV

increase / decrease

CONCLUSION the OV

increase / decrease

2) AIM / PURPOSE To investigate the relationship between

CV

and

OV

Time taken / minutes (WTC) Reading of temperature / 0 (WTO)

0

5

10

15

20

25

100 75

60

45

30

15

1) What is the RELATIONSHIP between the things you changed and observed? 2)

What CONCLUSION can be drawn from this fair test?

As the

CV

the

OV

THE ANSWER: As the time taken increases the reading of temperature decreases.

{

Relationship/ conclusion }

1. Identify the two variables involved in the experiment 2. Study the trend of changes 3. Use the key words No. of marbles increase

Length of the spring (cm)

3

5

6

10

9

increase

15

B. State the relationship between the variables As the ....................... ..................... the ............................... ……........... C. What conclusion can be made from the investigation? As the ....................... ..................... the ............................... …….................

Time taken / minutes Reading of temperature / 0C

0

5

10

15

20

25

100

75

60

45

30

15

1)

What is the AIM of this investigation?

2)

What is the PURPOSE of this fair test?

To find out relationship between WTC and

WTM.

THE ANSWER: To find out relationship between time taken and reading of temperature.

{

AIM / PURPOSE }

1. Identify the two variables involved in the experiment 2. Used the key words

No. of marbles

Length of the Spring (cm)

3 What to change

6

What to measure

9

A In the investigation : i. what to change

.....................................................

ii. What to observe

.....................................................

c) What is the aim of the investigation ? To find out the relationship between ................................and.............................