UPSR ANSWERING TECHNIQUES 2008

SECTION BSECTION BVARIABLES :1. A group of pupil is carried out an experiment to find out the temperature of water by heating at different time.The result is as in the table below

MVRV

Time (minute)Water Temperature ( C )259471683895

State :a. Manipulated variable : __________________________________

b. Responding variable : __________________________________The time taken

The temperature

2. An investigation is carried out to find out the relationship between sources of food and the number of consumers.Table below show the result :

What to be changed ? ________________________________

What to be observed ?________________________________Number of birds

Number of caterpillars

GRAPH3. A group of pupils carries out an activity using model cars. The bar chart below shows the information they obtained.

Number of batteriesSpeed (m/s) 2 4 6 8 10 12 605040302010

State two variables in the investigation. ______________________________________________________________Number of batteries (MV)Speed (RV)

ObservationDiagram 1 shows information gathered in investigation. 3 m3 m7 m7 mAverage : 200 mangoes per treeAverage : 300 mangoes per tree

Manipulated Variable__________________________________

Responding Variable__________________________________

Constant Variable__________________________________The distance

The number of mangoes

The types of tree.

INFORMATIONAn investigation was carried out to study the competition between seedlings. Different number of green bean seedlings are planted in three pots of the same size. All seedlings get the same amount of water and sunlight everyday. The results of the investigations are recorded at the end of the second week.

What to keep the same:_____________________________________________________________________

What to change :__________________________________

What to measure :__________________________________The types of seedlings/ Size of the pot/ Amount of water/ Amount of sunlight

The number of seedlings

The height of the seedling after two weeks.

AIM / PURPOSETo investigate/ study/ show the relationship between (MV) and (RV)

TREND / PATTERN/ CHANGEIncreases

Decreases

Unchange/ same

TREND / PATTERN/ CHANGE22, 22, 22, 22, 22

17, 27, 37, 42, 56

29, 23, 21, 17, 14Same / UnchangeIncreases Decreases

GRAPH

GRAPH

TABLE

The number of seedlings which were geminated from 80 seeds which are planted at the temperature of 20 C is 10.At temperature of 25 C is 20,at temperature of 20C is 40,at the temperature of 35C and 40 C are 70,at temperature of 45C is 10 and no seeds are germinate at the temperature of 50C

What is the trend for the number of seeds germinated ?Increases , same , decreases

TABLE

HYPOTHESISMVRVTREND ( increases)TREND ( increases)

As / If / When (MV) (Trend increases/ decreases) (RV) (Trend increases/ decreases)

As the time taken increases, the temperature increases.More time taken, higher temperature.

CONCLUSIONThe most suitable temperature for the seedlings to be germinated is at 35 C, and the most unsuitable is at 50C.The number of the germinated seedlings is the most at 35C and the least at 50C.The most suitable temperature for the seedlings to germinate is at 35 C and 40 C

PREDICT

Question : Predict the height of plant if the quantity of water is 20 ml.Answer : 35 cmReject answers :Between 35 cm and 40 cm35 cm or 40 cmMore than 34 but less than 40