Name:______________________ Period:______
Test Review
1. What is the definition of a physical property?
A characteristic of matter that you can observe or measure without changing the identity of the
matter.
2. What is the definition of a chemical property?
The ability or inability of a substance to combine with or change into one or more new
substances.
3. Fill in the table below based on your knowledge of the following objects.
**​These are all examples of possible answers you could have put down.**
4. Label the following properties as chemical or physical.
__​ P​___ My candle is blue.
___​ C​__ My candle is on a metal plate that can rust.
__ ​ P​___ My candle is smooth.
__​ C​___ My candle can catch on fire.
__​ P​___ My candle wax melts at 40 degrees celsius and re solidifies at 50 degrees.
__ ​ P​___ If I bend my candle stick, it will break.
__​ C​___ My candle will have a reaction with acid.
___​ P​__ My candle is not magnetic.
5. What is the definition of a physical change?
A change in the size, shape, form, or state of matter that does not change the matter’s identity.
6. What is the definition of a chemical change?
A change in matter in which the substance that make up the matter change into other
substances with different chemical and physical properties.
7. Write down four clues you can use to let you know that a chemical change has happened.
Strange change in color, change in smell, change in taste, release of heat, strange change in
state (heating something to a solid, two liquids make a solid), creation of a substrate (something
visible and new is formed), fizzing/bubbling
8. Label each of the following as a chemical change or a physical change. Include w
​ hy you
think the change is chemical or physical. ANSWER THIS PART ON YOUR OWN!!!
a. Frying an egg
__​ chemical​_________________________________________________________________
b. Burning sulfur gas.
__​ chemical​______________________________________________________________
c. Baking a cake.
__​ chemical​________________________________________________________________
d.Freezing a glass of lemonade.
__​ physical​___________________________________________________________________
e.Sugar dissolving in tea.
__​ physical​___________________________________________________________________
f.Mixing vinegar and baking soda.
_​ chemical​__________________________________________________________________
g.Breaking a twig
__​ physical​_______________________________________________________________
h.Melting butter.
__​ physical​_________________________________________________________________
i.Bacteria made milk go sour.
__​ chemical​_________________________________________________________________
j.An animal carcass rots in the forest.
___​ chemical​_________________________________________________________________
k.Sand moves through an hourglass.
____​ physical​_________________________________________________________________
l.A blueberry was stepped on and explodes.
__​ physical​__________________________________________________________________
m.Two clear substances are mixed together to form a purple substance.
_​ chemical ​___________________________________________________________________
9. Fireworks exploding is a chemical change. How can you tell that a chemical change is taking
place?
Energy is given off, many changes in color (know multiple chemical reactions are happening)
10. Jane takes a 5 lb block of ice and boils it into a gas. How much will all of the H2O (water)
gas particles weigh when put together? How do you know?
5 pounds. Law of conservation of mass. None created, none destroyed.
11. For an experiment, John mixes together a liquid acid and a liquid base. He witnesses
bubbling, and the formation of a solid substance. If the liquid reactants started with a cumulative
weight of 10 kg, how much will the gas and solid products weigh when combined?
a.
b.
c.
d.
More than 10 kg
Less than 10 kg
Exactly 10 kg
It is impossible to know
11. Is boiling water into a steam a chemical change or a physical change?
Physical
12. Is freezing water into ice a chemical change or a physical change?
Physical
13. Define the law of conservation of mass.
Mass can neither be created nor destroyed.
14. Label the reactants and products in the picture below.
Reactants
product
15. Do you think this equation obeys the law of conservation of mass? Why?
YES! All atoms present on the reactants side or on the product side. The only difference is the
arrangement. .
16. Do ALL equations obey the law of conservation of mass?
YESSSSS!!!!!! It is a law. It always holds true.
17. Lisa puts cake batter into an oven to bake a cake. Which of the following is the biggest
indicator that lets you know a chemical change has taken place.
A.
B.
C.
D.
There was a slight change in color.
A new, delicious smell was formed.
The cake is a circle.
The cake is at my house.
18. Pick TWO properties (they can be chemical or physical) and choose which objects fit under
each property.
For example, if I chose “has a smell” as one of my properties, I would separate all of the
pictures below into two categories, “has a smell” and “does not have a smell”. DO NOT USE
SMELL AS AN EXAMPLE. Be sure to do this TWICE.
(Candle Wick)
Liquid Mercury (liquid metal)
There are multiple ways you could group these objects. I will do three examples: flammability,
state of matter, and color.
Flammable: wood rubbing alcohol, candle wick
Not flammable: water, wrench, liquid mercury
Liquid: water, rubbing alcohol, liquid mercury
Not liquid: wood, candle wick, wrench
Color: wood, wrench, candle wick liquid mercury
Colorless: water, rubbing alcohol