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Science 2 SE2 Revision

Total questions: 100

Worksheet time: 2hrs 51mins

Name
Class
Date
1.

Choose the things that use electricity!

a)
b)
c)
2.

The ... uses electricity to keep food cold.

a)

Oven

b)

Kettle

c)

Refrigerator

3.

What can we do to use electricity safely?

a)

Do not put our finger or anything other than a plug into a socket

b)

Touch a switch with wet hands

c)

Use things with damaged wires

4.

What's the name from this part!

a)

Bulb

b)

Battery holder

c)

Wires

5.

Which of these tools doesn't use electricity?

a)
b)
c)
d)
6.

Choose what you should not do when using electricity?

The answer can be more than one.

a)
b)
c)
d)
7.

The meaning of the picture is...

a)

don't forget to wash your hands

b)

don't touch electricity with wet hands

c)

don't touch the wall

d)

don't touch the hand

8.

What can the electricity do?

a)

light things up

b)

power the motor

c)

heat things up

d)

produce sound and picture

9.

What can the electricity do?

a)

light the things up

b)

power the motor

c)

produce sound and pictures

d)

cool things down

10.

We eat food to get ....... to do work.

a)

Electricity

b)

Energy

11.

........ is also a form of energy.

a)

Electricity

b)

Ware

c)

Socket

12.

Which a type of batteries for watch?

a)
b)
c)
13.

Mains electricity is supplied by.....

a)

Power station

b)

Socket

c)

Wire

14.

To make an appliance work, we have to plug the appliance into a .......

a)

Socket

b)

Wire

c)

Batteries

15.

Main electricity can be very ........

a)

Friendly

b)

Dangerous

16.

This part of circuit is called....

a)

Bulb

b)

Switch

c)

Wire

17.

What would most likely to happen if we don’t use electricity safely?

a)

We could get hurt

b)

We could make our hands light

c)

We could gain superpowers

18.

A path along which electricity can flow is a ___________________?

a)

Circuit

b)

Plastic tape

c)

Bulb

19.

When a circuit is open, the lamp is...

a)

On

b)

Off

20.

Electricity flows through...

a)

Wires

b)

Rope

c)

Rubber

21.

Human body, conductor or insulator

a)

conductor

b)

insulator

22.

Which one of the objects below has a circuit?

a)
b)
c)
d)
23.

What is the name of this component of a circuit?

a)

wire

b)

battery

c)

cell

d)

switch

24.

What is the name of this component of a circuit?

a)

cell

b)

wire

c)

switch

d)

bulb

25.

A closed switch on a diagram means the switch is...

a)

off

b)

on

26.

The following objects can be found in a circuit except ..............

a)

battery

b)

wire

c)

an electrical appliance

d)

paper

27.

A path along which electricity can flow is called .....................

a)

light bulb

b)

switch

c)

insulator

d)

circuit

28.

Ron constructs this circuit. Both bulb and battery are all working. Which of these following actions he should do to lit the bulb?

a)

connect X to Y

b)

change the battery

c)

disconnect the wire from the battery

d)

remove the bulb

29.

This is a ....

a)

socket

b)

battery

c)

light

30.

What are the parts of a circuit?

a)

bulb, wire, battery

b)

bulb, wire, table

c)

battery holder, bulb, wire

31.

How should two batteries be connected in a flashlight?

a)

The positive end connected to negative end.

b)

The batteries are in the flashlight.

c)

The batteries are connected to the switch button.

32.

Which one is healthy food?

a)
b)
c)
d)
33.

Which of the following is not a grain?

a)

Bread

b)

Milk

c)

Rice

d)

Wheat noodles

34.

This is the sum of food that is eaten by a person or another organism.

a)

diet

b)

exercise

c)

hygiene

35.

Why is calcium important in a balanced diet?

a)

to repair and grow muscle

b)

to keep our bone and teeth strong

c)

to keep our skin healthy

36.

We should exercise regularly

a)

True

b)

False

37.

Washing hands can keep ... away.

a)

clean

b)

germs

c)

environment

38.

How do we take care of our oral health? (choose 2)

a)

By brushing our teeth twice a day

b)

By using dental floss

c)

By eating balanced diet

d)

By breathing clean air

39.

Why do we need to rest?

a)

Rest helps us to concentrate when study

b)

Rest helps us to gain weight

c)

Rest helps us to have oral health

40.
Eating too much of this can cause cavities
a)
apples
b)
water
c)
toothpaste
d)
sugar
41.
When this forms on your teeth, it can cause cavities
a)
Enamel
b)
Crown
c)
Plaque
d)
Fluoride 
42.

Which type of tooth is the picture representing?

a)

(a)Premolar

b)

(b) Molar

c)

(c) Canine

43.

An adult has ___ teeth.

a)

42

b)

32

c)

22

44.

What is the correct order of arrangement of teeth from front to back of the mouth?

a)

Incisors, Canines, Premolars, Molars.

b)

Canines, Premolars, Molars, Incisors.

c)

Incisors, Premolars, Canines, Molars.

45.

The molars teeth are use to

a)

tear food

b)

cut food

c)

grind food

46.

What is the function of canines?

a)

Tearing

b)

Cutting

c)

Grinding

d)

All of the above

47.

Dairy Food

a)

Milk, Tea

b)

Yogurt, Egg

c)

Cheese, Milk

d)

Cheese, Candy

48.

What do you need when you want to brush teeth?

a)

Toothpaste, Juice

b)

Toothpaste, Toothbrush

c)

Toothbrush, soap

d)

Soap, shampo

49.

Eat less

a)

Salty food, Oily food

b)

Fried chicken, Fruits

c)

White bread, Milk

d)

Egg, Vegetables

50.

What is a consequence of too many sugary drinks?

a)

Fever

b)

Toothache

c)

Back pain

d)

Healty teeth

51.

Protein food

a)

Fish, Eggs

b)

Chicken, Candy

c)

Meat, Noodle

d)

Meat, Rice

52.

An important part of maintaining good _______________ is washing your hands thoroughly and often.

a)

manners

b)

grades

c)

hygiene

d)

behavior

53.

Why does our pulse get faster when we exercise?

a)

Because our hearts are beating faster

b)

Because we are tired

c)

It's telling us we need to stop and relax

54.

We need carbohydrates for ____.

a)

giving us energy

b)

helping us grow

c)

keeping us from falling sick

d)

making us fat

55.

To keep healthy, we must ____.

a)

eat a lot of food

b)

sleep all day

c)

drink cola

d)

do exercise regularly

56.

What action made the straw change its shape?

a)

Bend

b)

Squash

c)

Stretch

d)

Twist

57.

What is the person doing to the cloth?

a)

Bend

b)

Twist

c)

Stretch

d)

Squash

58.

What is the person doing to the pair of jeans?

a)

Bend

b)

Twist

c)

Stretch

d)

Squash

59.

What is the person doing to the dough?

a)

Bend

b)

Twist

c)

Stretch

d)

Squash

60.

Which of the following can be bent using our hands only?

a)

Wooden table

b)

Glass door

c)

Plastic bag

d)

Metal box

61.

This girl is changing the shape of the playdough by.......

a)

squashing

b)

bending

62.

The shape of this rod is changed by .............

a)

bending

b)

stretching

63.

Can paper folded when is become into Ash?

a)

No, is to hot

b)

Yes, it can folded

c)

No, it can't because it's already become an Ash

d)

Yes, it's can

64.

Milk is _

a)

solid

b)

liquid

c)

gas

d)

none of them

65.

The process of solid turn into liquid because of heat is called _

a)

freezing

b)

dissolving

c)

stirring

d)

melting

66.

What form is this?

a)

solid

b)

liquid

c)

gas

d)

none of them

67.

What force is done in this picture?

a)

squash

b)

stretch

c)

twist

d)

bend

68.

Liquid will turn into _ when we heat it.

a)

solid

b)

liquid

c)

gas

d)

none of them

69.

Steam turns into water because of _

a)

heating

b)

stirring

c)

dissolving

d)

cooling

70.

The process when material disappear in water is called _

a)

dissolving

b)

heating

c)

cooling

d)

melting

71.

Materials will dissolve faster if we put it in _ water

a)

hot

b)

cold

c)

ice

72.

The butter turn from _ into _

a)

liquid, solid

b)

solid, gas

c)

gas, liquid

d)

solid, liquid

73.

Glass is made from _

a)

oil

b)

sand

c)

wood

d)

clay

74.

This picture show us that _ can turn into _

a)

liquid, solid

b)

gas, liquid

c)

liquid, gas

d)

solid, gas

75.

Which of these objects below that can be squasing?

a)
b)
c)
76.

Object that return to their original shape

after being stretched is called...

a)

Elastic

b)

Transparent

c)

Flexible

77.

Look at the picture!

What changes is happening to this object?

a)

Melting

b)

Boiling

c)

Freezing

78.

Which object below that can return

to their original shape after being changed?

a)
b)
c)
79.

Which of the following objects that can dissolve in water?

a)
b)
c)
80.

Which of the following objects that can not dissolve in water?

a)
b)
c)
81.

Look at the picture! The shape of object in the picture is?

a)

circular

b)

triangular

c)

square

82.

The objects that can be bent are described as...

a)

Flexible

b)

Elastic

c)

Transparent

83.

When the earth in the dark we call is...

a)

night

b)

day

c)

morning

84.
What does transparent mean?
a)
Hard to see through
b)
white colored
c)
something you can see through
d)
an obvious fact
85.
What color skin does the polar bear actually have?
a)
white
b)
beige
c)
blue
d)
black
86.
This is a polar bear's primary food source.
a)
sea kelp
b)
lemmings
c)
seals
d)
walrus
87.
Polar bears live on the __________.
a)
Arctic Tundra
b)
Antarctic Tundra
c)
Plains
d)
rainforest
88.
During the cold winter polar bears_________.
a)
hunt 
b)
hibernate
c)
swim south
89.
This helps polar bears become buoyant in the water, helping them swim faster and stay warm in the freezing water.
a)
blubber
b)
fur
c)
black skin
d)
black nose
90.
A den is ____________.
a)
a formation of ice.
b)
an area of cold water.
c)
a place where polar bears live.
d)
a father polar bear.
91.
Threats to polar bears include________.
a)
illegal hunting
b)
climate change
c)
loss of habitat
d)
all of the above
92.
Polar bears are fierce ___.
a)
swimmers
b)
hunters
c)
mothers
d)
playmates
93.
Second graders can help polar bears by ____.
a)
helping them hunt
b)
reduce, reuse and recycling
c)
reading books about polar bears
d)
staying away from the Arctic Ocean
94.
Polar bears are interesting ______ that we need to learn more about in order to protect them.
a)
reptiles
b)
fish
c)
mammals
d)
amphibians
95.

Too much sugar is bad for your

a)

teeth

b)

tongue

c)

stomach

96.

Three important things for our body

a)

Eat, sleep and repeat

b)

Eat,sleep and rest

c)

healthy diet,exercise and sleep

97.

The northern and southern lights are know as _______________.

a)

auroras

b)

thunder

98.

Polar habitats cover which two poles?

a)

North and South

b)

East and West

c)

North and West

d)

South and East

99.

Polar habitats are covered with

a)

water

b)

grass

c)

ice

d)

trees

100.

What do arctic hares like to eat?

a)

Small animals

b)

Plants

c)

Plants and animals

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