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Sec 1 WA1 Revision

Total questions: 45

Worksheet time: 29mins

Name
Class
Date
1.
This variable in an experiment is the one being changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
2.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
3.
If you increase the amount of spinach you eat, then you will increase the iron in your blood. 
What's the dependent variable?
a)
increase the amount of iron in your blood
b)
spinach you eat
4.
If I ride my bike to school instead of walking, then I will get to school faster. What is the dependent variable?
a)
True
b)
How fast you get to school
c)
Riding a bike or walking
d)
False
5.
You should never ______ chemicals in the lab. 
a)
taste
b)
touch
c)
smell
d)
all of the above
6.
Which is NOT true about a Bunsen burner?
a)
The air hole must be closed when lighting a Bunsen burner.
b)
When not in use, the yellow safety flame of a Bunsen burner should be visible.
c)
The blue flame of Bunsen burner is cooler than the yellow flame.
d)
A Bunsen burner must always be placed on a heatproof mat.
7.
what does this symbol mean?
a)
Toxic
b)
Irritant
c)
Flammable
d)
Biohazardous
8.
Which part of the Bunsen flame is the hottest?
a)
A
b)
B
c)
C
d)
D
9.

Name C

a)

Barrel

b)

Air Hole

c)

Base

d)

Gas adjustment/intake

10.

Which of the following steps are the correct sequence to light up a bunsen burner?

a)

A,B,C,D

b)

B,A,C,D

c)

C,D,A,B

d)

C,A,B,D

11.

Ahmad was given two pots of identical balsam plants by his parents. He put one in the garden under direct sunlight and the other inside his bedroom with little sunlight. He observed that the plant in the garden has grown taller compared to the one in his bedroom.

What variable should remain constant?

a)

type of balsam plants

b)

height of balsam plants

c)

amount of sunlight

d)

location

12.

Which is an example of qualitative data?

a)

Mdm Seow has a 5 kg school bag.

b)

Mdm Low's hair is 30 cm long.

c)

Mr Kartik is stronger than Mr Chng.

d)

Mr Sim is 10 cm taller than Mrs Chia.

13.

"To be a good basketball player, you should be at least 170 cm tall."

This statement is an example of

a)

qualitative data

b)

quantitative data

c)

both qualitative and quantitative data

d)

neither qualitative nor quantitative data

14.

After conducting experiments and collecting measurements, we should

a)

analyse the data for trends and patterns

b)

communicate the findings to the scientific community

c)

decide which quantities should be kept constant

d)

pose questions and form a hypothesis

15.

Which is not a rule of lab safety?

a)

safety goggles should be worn during experiments

b)

long hair should be tied back

c)

wash hands thoroughly before leaving the lab

d)

clear all broken glassware quickly

16.

What hazard symbol is this?

a)

corrosive

b)

explosive

c)

flammable

d)

environmental toxicity

17.

What hazard symbol is this?

a)

corrosive

b)

irritant

c)

oxidiser

d)

acute toxicity

18.

Which is not a consideration we should have when looking at issues?

a)

Administrative

b)

Economic

c)

Ethical

d)

Social

19.

Mr Chng's hypothesis is, "The closer a student stays to school, the later they will be for school."

To test this, which variable should be changed?

a)

time which student reaches school

b)

frequency of bus arrivals

c)

distance which student stays from school

d)

method which student takes to come to school

20.

What hazard symbol is this?

a)

causes instant death

b)

radioactive material

c)

harmful to animals

d)

acute toxicity

21.

The picture represents

a)

low accuracy and low precision

b)

low accuracy and high precision

c)

high accuracy and low precision

d)

high accuracy and high precision

22.

The prefix "mega" has a value of

a)

one billion

b)

one million

c)

one thousandth

d)

one millionth

23.

The SI unit of length is

a)

centimetre

b)

metre

c)

inch

d)

foot

24.

Which is not an SI unit?

a)

g

b)

K

c)

A

d)

s

25.

Which is an example of qualitative data?

a)

Mdm Seow has a 5 kg school bag.

b)

Mdm Low's hair is 30 cm long.

c)

Mr Kartik is stronger than Mr Chng.

d)

Mr Sim is 10 cm taller than Mrs Chia.

26.

What hazard symbol is this?

a)

corrosive

b)

irritant

c)

oxidiser

d)

acute toxicity

27.

The picture represents

a)

low accuracy and low precision

b)

low accuracy and high precision

c)

high accuracy and low precision

d)

high accuracy and high precision

28.

The SI unit of length is

a)

centimetre

b)

metre

c)

inch

d)

foot

29.

Mr Chng's hypothesis is, "The closer a student stays to school, the later they will be for school."

To test this, which variable should be changed?

a)

time which student reaches school

b)

frequency of bus arrivals

c)

distance which student stays from school

d)

method which student takes to come to school

30.

Which property defines why the handle of an iron is made of plastic?

a)

Heat conductivity

b)

Electrical conductivity

c)

Flexibility

d)

Hardness

31.

Ability to bend without breaking and return to its original shape is?

a)

Hardness

b)

Strength

c)

Flexibility

d)

Density

32.

Which of the following define strength?

a)

Ability to withstand a large amount of force without breaking

b)

Ability to withstand scratches

c)

How readily it accepts force

d)

How readiliy it scratches others

33.

An object has a density to 3 g/cm3 and a volume of 6 cm3. What is the mass of the object?

a)

0.5 g

b)

2 g

c)

9 g

d)

18 g

34.

An object has a mass of 45g and volume of 10cm3. What is its density?

a)

450 g/cm3

b)

55g/cm3

c)

4.5 g/cm3

d)

0.222 g/cm3

35.

The object with the highest density will ...... ?

a)

Sink

b)

Float

c)

Fly

d)

Disappear

36.

________________ materials can support heavy weights without breaking

a)

strong

b)

float

c)

rubber

37.

A handkerchief is made from _________________ and it is flexible.

a)

rubber

b)

metal

c)

fabric

38.

Which material is shiny and conducts electricity

a)

Plastic

b)

Glass

c)

Rubber

d)

Metal

39.

hardness means

a)

Can scratch

b)

can absorb

c)

can hold weight

d)

Can float

40.

Heat conductor means

a)

Can scratch easily

b)

Hold heavy weight

c)

allow heat to pass through

d)

can float

41.

electric conductor means

a)

allow electricity to pass through

b)

Allow heat to pass through

c)

can stretch

d)

can absorb liquid

42.

electric insulator means

a)

Can bend

b)

Can allow heat to pass

c)

not allow electricity to pass

d)

can stretch

43.

Heat conductor means

a)

Can scratch easily

b)

Hold heavy weight

c)

allow heat to pass through

d)

can float

44.

We can test the level of hardness of materials by scratching them together.

a)

True

b)

False

45.

What is the hardest material on Earth?

a)

calcium

b)

sponge

c)

granite

d)

diamond

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