Science Teknik Aku

8/6/2019 Science Teknik Aku

http://slidepdf.com/reader/full/science-teknik-aku 1/18

When someone watches someone or something carefully

Something that you directly see, hear, smell, taste, or touch

Nothing the properties of objects and situations using the

five senses.E.g. seeing,hearing,touching,smelling,tasting

Tips for Answering ObservationAnswer only what you observe based on the results in theAnswer only what you observe based on the results in the

graph, diagrams ,tables ORgraph, diagrams ,tables OR informationsinformations givengiven..

J awab berdasarkan pemerhatian kamu berdasarkan graf, carta, jadual atau maklumat yang diberikan

Do not give reasons for your answer. If you give reasons, itDo not give reasons for your answer. If you give reasons, it

means that you have state an inference not observationmeans that you have state an inference not observation..

Tidak perlu memberikan sebab dan alasan bagi jawapan kamu«.sebab dan alasan hanya untuk inferens



What can be observed from the diagram

above?Pigeon A is smaller than pigeon B.

Merpati A lebih kecil berbanding

Merpati B

Pigeon A

Pigeon B

Contoh 1

Contoh 2

A. The fish in container P stays alive.

I kan di dalam bekas P terus hidup

B. The fish in container P stays alive, the

fish in container Q dies.

I kan di dalam bekas Q mati.

State your observation after a few hours.



Number

of

chicks

1 2 3 Day

a) What can you observe from the graph given?

The number of chicks decrease.

J umlah anak ayam menurun/berkurang

Contoh 3

The number of marbles

on a weighing balance

20 30 40

The mass of marbles (g) 60 80 90

State you observation based on the table above.

The mass of the marbles increase.

Contoh 4



A fact that you decide is true because of the informationthat you have.

F akta yang diberikan benar berdasarkan maklumat yang diperoleh

A statement worked out from a given information, such asobservations and measurements.

Penyataan adalah berdasarkan maklumat yang diberikan seperti pemerhatian atau pengukuran

Giving an explanation for a particular object or event

Memberikan penjelasan kepada objek atau keadaan



Give a reason why planet Pluto takes the longest time to make one complete movement

around the Sun? Berikan alasan mengapa planet Pluto mengambil masa yang panjang untuk melengkapkan

peredaran mengelilingi matahari

Because Pluto has the biggest orbit.Pluto mempunyai orbit yang besar

Give a reason why planets are not colliding with each other? Berikan sebab mengapa tidak berlaku pelanggaran antara planet dengan planet yang

lain?Because all planets moving around the Sun in their own orbits.

Sebab semua planet beredar mengelilingi matahari mengikut orbitnya.Two similar potted balsam plants are used in this experiment, They are

labelled A and B. A transparent plastic bag is placed over plant A and tied at

the base. Then, two potted plants are placed outdoors and watered every

day for two weeks.

Give an inference ba

sed on your observation.

*Observation :Plant A is still alive, plant B is dead.

Plant A is still alive because it gets air

, plant B is dead because it does not get air.

Pokok A terus hidup kerana mendapat udara berbanding dengan pokok B

Contoh 1

Contoh 2

Contoh 3



The diagram below shows the changes of the position of a shadow

throughout the day.

What can you infer about the changes of the position of the shadow?

The position of the shadow changes because the Earth rotates on its own axis from West to East. K edudukan bayang berubah kerana bumi berputar pada paksinya dari timur ke barat

The observations are recorded by Nellina are as follows:-

- The toy car moves faster on the glass surface.

- The toy car moves slowly on the sandpaper.

a) Write two reasons to explain the difference in the above observations.

i) The glass surface is smoother and produces less friction.

Permukaan kaca yang lincin mengurangkan daya geseran

i) The sandpaper surface is rougher and produces strong friction.

Permukaan kertas pasir yang kasar menambahkan daya geseran



There are three types of variables:-

Terdapat tiga jenis pembolehubah iaitu:-a) what is changed manipulated variable

A pakah yang diubah ²pembolehubah yang dimanipulasikanThings that being changed in the experiment

b)What is observed/measured- responding variable

A pakah yang perhatikan/diukur ²pembolehubah yang bergerakbalasThings that being observed/ recorded/measured

c) What is kept the same-constant/fixed variable

A pakah yang disamakan²pembolehubah yang malar/samaThings that kept the same so it will not affect the result of theexperiment



Suppose we want to test this statement. Menguji berdasarkan pernyataan

The more salt dissolved in water,the higher the

boiling temperature.

´S emakin bertambah jumlah garam yang larut di dalam air, semakin tinggi suhu

takat didihµ a) What must be changed? Apakah yang diubah

b) What must be observed? Apakah yang diperhatikan?

The amount of salt dissolved in water

J umlah garam yang larut di dalam air

The boiling temperature

S uhu takat didih



The table shows two observations of an experiment that was

conducted by Azam. Two series circuit were built. Circuit P has two

bulbs whereas circuit Q has three bulbs.

Circuits P Q

The brightness

of the bulbs

Brighter Dim

a) What variables that should be kept the same?

- the type of circuits

- the number of batteries

b) What is changed?

The number of bulbs

c) What is observed?

The brightness of the bulb



The bar chart in diagram below shows the change in the length of the shadow of

an object in a study.

Length of

the shadow

9.00 10.00 11.00 12.00 1.00 2.00 3.00 Timea.m. a.m. a.m. noon p.m. p.m. p.m.

140

120

100

80

60

40

20

10

State the pattern of change in the length of the shadow from 9.00 a.m. to 2.00 p.m.

Length of the shadow decreases from 9.00 am to 1.00pm and then

increases from 2.00 pm until 3.00 pm



A group of researches gathered information about an animal

species in a particular forest. The table below shows

information obtained by the researches.

Year Number of animals

species

1990 2001995 170

2000 150

2005 130

a) What is the trend in the number of the animal species?

Decreasing



A group of students carried out a study to find out the

relationship between frogs and grasshoppers in a

garden. The study was completed in five weeks. Theobservations are recorded in the followig table.

Week 1 2 3 4

Number of grasshoppers

38 30 23 17

Number of frogs 5 9 14 19

State the change in the number of frogs.

increases



FORMULA MENGIRA

KELAJUAN, JARAK DAN MASA

J

M

Jarak

kelajuan

masaK

JAKIM Nak cari? JARAK

JARAK = Bulatkan JARAKJARAK = KELAJUAN x MASA

Nak cari? KELAJUAN

KELAJUAN = Bulatkan KELAJUAN

KELAJUAN = JARAK ÷ MASA

Nak cari?MASA

MASA = Bulatkan MASAMASA = JARAK ÷ KELAJUAN

X



Jarak

masa

45

3?= =

masa = 3 saat

jarak = 45 meter

kelajuan = ?

J

MK

JAKIM

KELAJUAN =

JARAK ÷ MASA

Contoh 1



Y azid poured 50 cm³ of water into a measuring cylinder. He had several

marbles of the same size. He wanted to measure the volume of each

marble. He dropped the marbles, two at a time , into the cylinder. The

volume of water was recorded each time he dropped the marbles as shown

in the table below.

The number of

marbles

0 2 4 6 8

Volume of

water (cm³)

50 52 54 56 60

Predict the volume of water if 20 marbles were dropped into the

measuring cylinder.

70 cm³

2 marbles = 2 cm³

1 marbles = 2 ÷2=1 cm³

20 marbles = 20 cm³ + 50 cm³

= 70 cm³



4.04.01010RR

4.54.588Q Q

5.05.066

Distance of eggDistance of egg

from the waterfrom the water

surface (cm)surface (cm)

Quantity of Quantity of

saltsalt

(spoon)(spoon)

BeakerBeaker

Predict the distance of the egg from the water surface if 12 spoons of salt are used in the investigation.

3.5 cm

12 ?

PREDICTForecasting a future occurrence based on

past observations or the extension of data



TRENDAdakah ianya

bertambah/meningkat(INCREASE)

Atauberkurang/menurun(DECREASE)

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