UPSR Science Enhancement Module

MAKING INFERENCES

1. The diagram shows an investigation carried out by a group of pupils. They planted balsam plants in containers P and Q. The result of the investigation is shown below.

Container P Container Q

a) Choose any of the above observations and give a suitable reason.

Observation: ___________________________________________________

Reason: ___________________________________________________

b) State another observation to support your reason in (a). ______________________________________________________________

c) In another investigation, a pupil finds that the grass covered with a piece of plank turns yellowish. Give a reason for this observation.

______________________________________________________________ ______________________________________________________________

Observations: 1. The number of plants in container Q is more than the number of plants in container P. 2. The plants in container Q are taller than plants in container P

UPSR Science Enhancement Module

MAKING INFERENCES

2. Ali carries out an investigation to study the relationship between the source of food

and the number of consumers. The investigation involves two animals in a jungle

as shown in the diagram below.

X Y

S T The table shows the findings of the investigation.

Week 1 2 3 4 5 Number of animal S 110 102 90 72 48 Number of animal T 6 10 15 21 28

a) Based on the above table, give a reason for the change in the number of

animal S.

___________________________________________________

b) State another observation to support your reason in (a).

________________________________________________________

UPSR Science Enhancement Module

MAKING INFERENCES

3. A pupil carries out an investigation by planting a plant in a pot. The diagram shows her observation after three weeks.

After three weeks

a) Write an observation about the condition of the plant after three weeks and give a suitable reason .

Observation : _______________________________________________ Reason : __________________________________________________

b) State another observation to support your reason in (a). _____________________________________________________________

c) When further investigation is carried out, it is found that the plant has been put inside the cupboard in the science room.

Give a reason for the condition of the plant after three weeks. _____________________________________________________________

4. The table shows the amount of waste collected in Sekolah Kebangsaan Bunga Raya from year 2002 to 2007. The number of pupils in the school remains the same in each year.

Year 2002 2003 2004 2005 2006 2007 Mass of waste / kg 430 450 500 480 400 350

a) Give a reason for the decrease in the amount of waste from year

2005 to 2007.

_______________________________________________________

b) Give another reason for the decrease in the amount of waste from year

2005 to 2007.

_______________________________________________________

c) State another observation based on your reason in (b).

_______________________________________________________

UPSR Science Enhancement Module

MAKING INFERENCES

5. Alia carries out an investigation to observe the height of a plant for ten days. The table shows her findings.

Number of days Height of plant / cm 2 9 4 12 6 15 8 18

10 21

a) Based on the above findings, give a reason for the increase in the height of a plant . ________________________________________________________________ b) State another observation to support your reason in ( a). ______________________________________________________________ c) Give another reason for your answer in (b). _______________________________________________________________

6. The table shows two different containers, S and T filled with the same volume of water. The volume of water left in each container is observed after one hour.

Container Volume of water at the start / ml

Volume of water left after one hour / ml

S 100 90 T 100 95

a) Give two reasons for the difference in the volume of water left in the containers after one hour. 1. ________________________________________________________________ 2. ________________________________________________________________ b) State another observation to support any of the reasons in (a). __________________________________________________________________

UPSR Science Enhancement Module

MAKING INFERENCES

7. An investigation has been carried out on the height of chilli plants in pots A and B. The table shows the results after one month.

Pot Height of chilli plants / cm A 12 B 8

a) Write an observation about the height of the chilli plant in pot A compared to that in pot B and give a reason.

Observation: ______________________________________________________ Reason : ______________________________________________________

b) State another observation to support your reason in (a).

_______________________________________________________________

c) Give another reason for your answer in (b). _________________________________________________________________

UPSR Science Enhancement Module

MAKING INFERENCES

8. Nora carries out an investigation. She puts four objects into the water in a container as shown in the diagram. The observation is made after one week.

The result obtained is shown in the table.

a) What do you observe about the condition of the objects and state a reason.

Observation: ___________________________________________________ reason: ___________________________________________________

b) State another observation to support your reason in (a). _________________________________________________________________

Objects Rusting Yes No

Paper clip /

Marble /

Thumbtack /

Cork /

Water Container