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Worksheetschemical and physical changes
Total questions: 49
Worksheet time: 54mins
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.
Is wood burning a physical or chemical change?
a)
Physical
b)
Chemical
4.
Is milk going sour a physical or chemical change?
a)
Physical
b)
Chemical
5.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical
b)
Chemical
6.
Is mold growing on cheese a physical or chemical change?
a)
Physical
b)
Chemical
7.
Is making orange juice a physical or chemical change?
a)
Physical
b)
Chemical
8.
Is sharpening a pencil a physical or chemical change?
a)
Physical
b)
Chemical
9.
Is copper tarnishing a physical or chemical change?
a)
Physical
b)
Chemical
10.
Is the formation of the grand canyon a physical or chemical change?
a)
Physical
b)
Chemical
11.
Which of the following is a reactant
a)
CH4
b)
H2O
c)
CO2
d)
2H2O
12.
In an exothermic reaction, energy is _________.
a)
Released
b)
Absorbed
c)
Stored
d)
Doubled
13.
During Photosynthesis energy is absorbed. What kind of reaction is it?
a)
Physical
b)
Exothermic
c)
Endothermic
d)
Photothermic
14.
The Law of Conservation of Mass tells us matter can't ______________.
a)
change color
b)
change state of matter
c)
be created or destroyed
d)
change temperature
15.
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
16.
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
17.
In a chemical reaction, how do the reactants compare to the products?
a)
They are the same
b)
They are different
18.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
19.
Exploding Fireworks?
a)
Physical Change
b)
Chemical Change
20.
Melting a chocolate bar?
a)
Physical Change
b)
Chemical Change
21.
Rotting bananas?
a)
Physical Change
b)
Chemical Change
22.
Cutting your hair?
a)
Physical Change
b)
Chemical Change
23.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
24.
Is sqeezing organges to make orange juice a phyical or chemcial change?
a)
physical
b)
chemical
25.
If enough heat is taken away from a container of water, what will happen to the water?
a)
It will begin to boil.
b)
It will become a solid.
c)
It will turn into a gas.
d)
It will increase in weight.
26.
What happens when a piece of wood burns?
a)
A physical change takes place.
b)
A chemical change takes place.
c)
The wood loses its gravity.
d)
The wood loses its inertia.
27.
Which answer makes a correct statement?
a)
Physical change only changes the size.
b)
Physical change only changes the color.
c)
Physical changes begin and end with the same matter.
d)
Physical changes change the matter into something total different.
28.
Which is NOT an example of condensation?
a)
Dew is found on the grass on a summer morning.
b)
Drops of water form on a cold can of soda on a hot day.
c)
A bucket of water left uncovered eventually becomes empty.
d)
The walls of a bathroom are damp after someone takes a showers.
29.
The diagram below shows changes happening to water in a specially shaped bottle.
What changes did the water undergo?
What changes did the water undergo?
a)
melting and then freezing
b)
freezing and then evaporation
c)
condensation and then melting
d)
evaporation and then condensation
30.
Which action would cause the weight of an object or substance to decrease?
a)
stirring it
b)
burning it
c)
freezing it
d)
dissolving it
31.
Which property of a substance depends on how much of the substance there is?
a)
mass
b)
density
c)
boiling point
d)
melting point
32.
______ is the amount of space that an object takes up.
a)
volume
b)
space
c)
room
d)
density
33.
A change that does not result in a new substance.
a)
Physical Change
b)
Chemical Change
34.
Students observed as small drops of water collected on the outside of a glass.
Which statement BEST describes why the water vapor in the air formed liquid water on the outside of the glass?
Which statement BEST describes why the water vapor in the air formed liquid water on the outside of the glass?
a)
The humidity outside the glass turns the vapor to liquid water.
b)
The water vapor pulls the water from inside the glass to outside the glass.
c)
The temperature of the water inside the glass is colder than the air outside the glass.
d)
The temperature of the water inside the glass is warmer than the air outside the glass.
35.
A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?
a)
cutting a piece of paper
b)
folding a piece of paper
c)
tearing a piece of paper
d)
burning a piece of paper
36.
A student is creating a potting soil mix. She combines 100 grams of sand, 200 grams of soil, and 200 grams of pebbles to make her potting soil. What is the mass of the potting soil?
a)
100 grams
b)
200 grams
c)
300 grams
d)
500 grams
37.
A group of students investigated physical and chemical changes using paper. The students recorded their observations in a table.
Which student correctly recorded all the changes that took place?
Which student correctly recorded all the changes that took place?
a)
Student 1
b)
Student 2
c)
Student 3
d)
Student 4
38.
Water freezing
a)
Chemical Change
b)
Physical Change
39.
Ice melting
a)
Chemical Change
b)
Physical Change
40.
Wood burned in a fireplace
a)
Chemical Change
b)
Physical Change
41.
Cake batter baked in an oven
a)
Chemical Change
b)
Physical Change
42.
Blue liquid and yellow liquid mixed to make a green liquid
a)
Chemical Change
b)
Physical Change
43.
Light used to produce food in plants
a)
Chemical Change
b)
Physical Change
44.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
45.
Glass bottle that is shattered
a)
Chemical Change
b)
Physical Change
46.
Copper roof changing color
a)
Chemical Change
b)
Physical Change
47.
Rust on an iron fence
a)
Chemical Change
b)
Physical Change
48.
Boiling water
a)
Chemical Change
b)
Physical Change
49.
Burning coal
a)
Chemical Change
b)
Physical Change
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