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Ace evidence of chemical change

Total questions: 50

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

What happens when a new substance is produced during a reaction?

a)

physical change

b)

chemical change

2.

rusty nail

a)

physical change

b)

chemical change

3.

broken glass

a)

physical change

b)

chemical change

4.

mixing baking soda and vinegar

a)

physical change

b)

chemical change

5.

Is milk going sour a physical or chemical change?

a)

Physical

b)

Chemical

6.

Which of the following is a physical change?

a)

Dissolving

b)

Rapid release of heat

c)

Fizzing (release of gas)

d)

Rusting

7.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical 
b)
Chemical
8.
Is sharpening a pencil a physical or chemical change?
a)
Physical 
b)
Chemical
9.
Which of the following IS a clue that a chemical change has occurred? 
a)
State of matter change
b)
Size Change
c)
Change in temperature
d)
Shape change
10.
Which of the following is NOT a clue that a chemical reaction has taken place?
a)
Changing size
b)
Changing color
c)
A gas being formed
d)
Formation of a precipitate
11.
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
12.
Chemical compounds undergo both physical and chemical changes.  Which of the following is an example of a physical change?
a)
salt ( NaCl) being dissolved into water
b)
combining oxygen gas and hydrogen gas to form liquid water
c)
reordering atoms in a molecule
d)
heat being released when combining two substances
13.
What type of change is this?
a)
A chemical change
b)
A physical change
14.
Properties that can be observed without trying to change the identity of the substance.
a)
Physical
b)
Chemical
15.
What type of change would this be?
a)
Physical Change
b)
Chemical Change
16.
Define a physical property.
a)
Observations made or measured using your senses, without changing the identity of the substance
b)
Can only be measured using specific science equipment
c)
Only observed in situations where the identity of the object is changing
d)
Only measurable if the identity of the object changes  
17.
A physical change is?
a)
It changes the object into something different
b)
Objects or substances undergo a change that does not change their chemical composition
c)
it is just like a chemical reaction
d)
Paper burning
18.

The production of carbon dioxide gas when baking soda and vinegar reacted indicated a _____________.

a)

Chemical change

b)

Physical change

19.

A reaction where more energy is released when the bonds of the products are formed than it takes to break the bonds of the reactants. Example: An explosion

a)

Exothermic reaction

b)

Endothermic reaction

20.

Color change, formation of a precipitate, formation of a gas, odor change and temperature change are all signs of a ...

a)

Physical Change

b)

Chemical Change

21.
Is "a glass of milk becoming sour" physical or chemical?
a)
Chemical change
b)
Physical change
22.
Which is NOT an indicator of a chemical change?
a)
temperature change
b)
formation of a precipitate
c)
shape change
d)
production of light
23.

Sugar dissolves in water

a)
Chemical Change
b)
Physical Change
24.
If you change a substance into a new substance...
a)
Partial Change
b)
Physical Change
c)
Chemical Change
d)
Freezing
25.

Sugar dissolves in water

a)
Chemical Change
b)
Physical Change
26.

Silverware tarnishing is an example of a _____ change

a)

Physical

b)

Chemical

27.
Is sour milk a physical or chemical change?
a)
Physical
b)
Chemical
28.

Cutting hair is an example of a _____ change

a)

Physical

b)

Chemical

29.
Is bending copper wire a physical or chemical change?
a)
Physical
b)
Chemical
30.
Ripping up paper ...
a)
Chemical Change
b)
Physical Change
31.
An explosion occurs ...
a)
Chemical Change
b)
Physical Change
32.

 

Which is an example of a physical

change?

a)

a candle burning

b)

baking a cake

c)

evaporating water

d)

metal rusting

33.

Mowing the lawn is an example of

a)

Chemical Change

b)

Physical Change

c)

No Change

34.
A change in phase or state of matter ...
a)
Chemical
b)
Physical
35.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
36.
Signs that a chemical change has occurred include
a)
a change in color
b)
the release of bubbles
c)
the production of an odor
d)
all are correct.
37.
True or false: The production of a loud sound may be a sign that a chemical change has occurred.
a)
True
b)
False
38.
fireworks exploding
a)
physical change
b)
chemical change
39.
frying an egg
a)
physical change
b)
chemical change
40.
a)
physical change
b)
chemical change
41.
freezing chocolate covered bananas
a)
physical change
b)
chemical change
42.
corroding metal
a)
physical change
b)
chemical change
43.
Physical or Chemical Change?  Baking a cake.
a)
Chemical Change
b)
Physical Change
44.
Physical or Chemical Change?  Logs burning in a campfire.
a)
Physical Change
b)
Chemical Change
45.
Physical or Chemical Change?  Making a paper airplane.
a)
Physical Change
b)
Chemical Change
46.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
47.
An instant ice pack getting cold when the chemicals are able to touch.
a)
Chemical Change
b)
Physical Change
48.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
49.
Is copper tarnishing a physical or chemical change?
a)
Physical 
b)
Chemical
50.
Is mold growing on cheese a physical or chemical change?
a)
Physical 
b)
Chemical

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