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Physical and Chemical change

Total questions: 35

Worksheet time: 2hrs 32mins

Name
Class
Date
1.
Which of the following tells you that a chemical change may have occurred?
a)

Change Shape

b)

Melting

c)

Vaporizing

d)

Change in color

2.

What happens in all chemical changes?

a)

Change in state of matter

b)

A new substance is formed

c)

Bubbles are produced

d)

An explosion

3.

Which of the following could not indicate that a chemical change took place ?

a)

change of color

b)

change in temperature or energy

c)

formation of gases

d)

changes are reversible

4.

Which of the following is an example of physical change ?

a)

Mixing baking soda and vinegar together and its cause bubbles and foam.

b)

A glass cup falls from counter and shatters on the ground.

c)

Lighting a piece of paper on fire and the papers burns up and leaves ashes.

d)

Baking a birthday cake for your mother.

5.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
6.

Freezing Juice?

a)

Physical Change

b)

Chemical Change

7.
A change where one or more new substances are created.
a)
Physical Change 
b)
Chemical Change 
8.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
9.
Which of these does NOT happen during a chemical change?
a)
Atomic bonds are formed or break apart
b)
New substance(s) are formed with different chemical properties
c)
The number of atoms in the reaction stays the same
d)
The chemical properties of the beginning substance(s) are the same as those of the end product(s)
10.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
11.
Digesting your food is an example of 
a)
chemical change
b)
physical change
12.
Which is a physical change?
a)
melting ice
b)
burning wood
c)
rotting food
d)
rusting iron
13.
Which is a physical change?
a)
digesting food
b)
burning natural gas
c)
exploding firework
d)
chopping onions
14.

Choose two statements are correct about physical and chemical changes.

a)

When a new substance is formed, it is called a chemical changes.

b)

When the appearance or shape of a substance changes it is called a physical changes.

c)

Metal rusting is an example of a physical changes.

d)

Water freezes is an example of chemical changes.

15.

Choose two answer for chemical changes.

a)

A bicycle changes color as it rusts.

b)

A marshmallow is cut in half.

c)

A solid is crushed to a powder.

d)

A marshmallow is toasted over a campfire.

16.

Which of the following are chemical changes ?

A : rusting or metal tap

B : burning of candles.

C : burning of bread.

D : chopping of vegetables.

a)

A only

b)

A, B, and C only

c)

A and B only

d)

A, B, C, and D

17.

Sania is conducting experiment to observe physical and chemical changes. Based on her experiment, which of her experiment shows physical change ?

a)

Plaster of paris is mixed with water

b)

Vinegar is mixed with baking soda

c)

Melting ice cubes in a glass

d)

Burning candle

18.
Exploding Fireworks?
a)
Physical Change 
b)
Chemical Change 
19.
Melting a chocolate bar?
a)
Physical Change
b)
Chemical Change 
20.
Cutting your hair?
a)
Physical Change
b)
Chemical Change
21.

What causes changes in materials from picture?

a)

heat

b)

light

c)

mixing

d)

electricity

22.

Based on picture solar cells need _____ to produce electricity

a)

heat

b)

light

c)

mixing

d)

electricity

23.

Based on picture electric cars need _______ to move.

a)

heat

b)

light

c)

electricity

d)

mixing

24.

Iron rust has a layer of reddish-brown when it is _____ with water and air

a)

heat

b)

light

c)

electricity

d)

mixed

25.

Things around us are made up of different materials. They can be classified into pure substance and mixture. depending on their constituents. What is difference pure substance and mixture?

4 lines
26.

Give example pure substance and mixture in our daily live. (mention 2 each)

4 lines
27.
Chemical changes usually ___________. 
a)
can't be eaten
b)
involve only two things 
c)
can't be undone 
d)
can be reversed 
28.
Change in the shape or form of matter like dissolving sugar in water, is a type of _________
a)
nuclear change 
b)
mass change 
c)
physical change 
d)
chemical change 
29.
Digesting food is an example of which type of change? 
a)
Physical change 
b)
Nuclear change 
c)
Mass change 
d)
Chemical change 
30.
Folding paper is an example of which type of change? 
a)
Physical change 
b)
Chemical change 
31.
Rusting metal is a ______________
a)
physical change 
b)
chemical change 
32.
Change in the state of matter. 
a)
Physical change 
b)
Chemical change 
c)
Mass change 
d)
Nuclear change 
33.
Exploding fireworks is an example of which type of change? 
a)
Chemical change
b)
Physical change 
c)
Mass change 
d)
Nuclear change 
34.
Slicing bread is a __________.
a)
chemical change 
b)
physical change 
35.
What type of change do you get when placing a Styrofoam cup in 100% pure acetone? 
a)
Chemical change 
b)
Physical change 
c)
Nuclear change 
d)
Mass change 

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