Name:     ID: 
 
    Email: 

Chapter 2 Online Test

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

1. 
Matter is defined as anything that
a.
can be seen and touched.
c.
can be weighed.
b.
has mass and takes up space.
d.
contains kinetic or potential energy.
 

2. 
A substance that cannot be broken down into simpler substances is
a.
a compound.
c.
an element.
b.
a mixture.
d.
an atom.
 

3. 
The chemical formula for water, H2O, means that each water molecule contains
a.
two hydrogen atoms and two oxygen atoms.
b.
two hydrogen atoms and one oxygen atom.
c.
two hydrogen atoms and zero oxygen atoms.
d.
one hydrogen atom and two oxygen atoms.
 

4. 
You put 1 gram of salt into 1 liter of water and stir. The resulting liquid is an example of
a.
a pure substance.
c.
a homogeneous mixture.
b.
a heterogeneous mixture.
d.
an immiscible mixture.
 

5. 
The science of what matter is made of and how it changes is called
a.
chemistry.
c.
kinetics.
b.
physics.
d.
engineering.
 

6. 
The chemical element that is most abundant in the human body is
a.
nitrogen.
c.
carbon.
b.
iron.
d.
oxygen.
 

7. 
The smallest unit of a substance that behaves like the substance is
a.
an element.
c.
a molecule.
b.
an atom.
d.
a compound.
 

8. 
The element that is most abundant in Earth is
a.
iron.
c.
silicon.
b.
oxygen.
d.
magnesium.
 

9. 
The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
a.
3
c.
6
b.
5
d.
7
 

10. 
The chemical formula for table sugar is C12H22O11. How many oxygen atoms are in each sugar molecule?
a.
2
c.
12
b.
11
d.
22
 

11. 
A material that can be represented by a chemical formula is
a.
an element.
c.
a homogeneous solution.
b.
a mixture.
d.
a pure substance.
 

12. 
Which of the following is an example of a gas-liquid mixture?
a.
the air we breathe
c.
soapsuds
b.
a carbonated drink
d.
ice cubes
 

13. 
The resistance of a fluid to flow is referred to as
a.
pressure.
c.
viscosity.
b.
energy.
d.
shape.
 

14. 
Which state of matter will hold its shape without a container?
a.
solid
c.
gas
b.
liquid
d.
plasma
 

15. 
The kinetic theory is useful for
a.
determining how much heat is necessary to melt a solid.
b.
explaining how matter and energy are related.
c.
testing the temperature of a gas.
d.
showing the differences between states of matter.
 

16. 
The kinetic theory states that the higher the temperature, the faster the
a.
particles that make up a substance move.
b.
bonds between atoms break down.
c.
molecules of gas rush together.
d.
lighter particles within a substance clump together.
 

17. 
The change of a substance from a solid directly to a gas is called
a.
condensation.
c.
melting.
b.
evaporation.
d.
sublimation.
 

18. 
The ability to change or to move matter is referred to as
a.
kinetic theory.
c.
evaporation.
b.
energy.
d.
heating.
 

19. 
All changes of the state of matter require
a.
water.
c.
energy.
b.
vibration.
d.
sublimation.
 

20. 
Evaporation refers to the change of state from a
a.
liquid to a gas.
c.
solid to a liquid.
b.
gas to a liquid.
d.
liquid to a solid.
 

21. 
The law of conservation of mass states that mass cannot be
a.
burned.
c.
created or destroyed.
b.
changed in form.
d.
heated or cooled.
 

22. 
During a chemical or physical change, energy may be
a.
created.
c.
greatly increased in strength.
b.
destroyed.
d.
converted into another form.
 

23. 
You burn a log of wood, and only a small pile of ashes is left. What has happened?
a.
A large amount of mass has been lost.
b.
A small amount of mass has been converted into a large amount of heat energy.
c.
The total mass of the wood and oxygen is the same as the total mass of the ash and gases.
d.
The total amount of energy is less than before.
 

24. 
A liquid changes rapidly into a gas at the liquid's
a.
boiling point.
c.
melting point.
b.
freezing point.
d.
condensation point.
 

25. 
Knowing the chemical properties of a substance will tell you how the substance
a.
looks.
c.
can be broken down into atoms.
b.
smells.
d.
reacts with other substances.
 

26. 
Which of the following is not an example of a physical property?
a.
freezing point
c.
reactivity
b.
boiling point
d.
density
 

27. 
Lead has a density of 11.3 g/cm3. What is the volume of a block of lead with a mass of 282.5 g?
a.
2.5 cm3
c.
250 cm3
b.
25 cm3
d.
2500 cm3
 

28. 
A substance has a mass of 360 g and a volume of 7.5 cm3. What is its density?
a.
2700 g/cm3
c.
480 g/cm3
b.
270 g/cm3
d.
48 g/cm3
 

29. 
Which of the following is an example of a chemical change?
a.
ice melting
c.
pounding gold into a coin
b.
paint fading
d.
a puddle of water evaporating
 

30. 
Which of the following is an example of a physical change?
a.
dissolving salt in water
c.
cooking an egg
b.
burning wood into charcoal
d.
rusting iron
 

31. 
Ice floats in water because it is
a.
more dense than water.
c.
colder than water.
b.
less dense than water.
d.
warmer than water.
 

32. 
Digesting food is an example of
a.
physical change.
c.
chemical change.
b.
change of state.
d.
buoyancy.
 

33. 
When water is broken down, what happens to the oxygen and hydrogen atoms it is made of?
a.
They combine with oxygen in air to produce new substances.
b.
They are rearranged to form hydrogen and oxygen gas
c.
They are destroyed.
d.
They increase in size until they form a solid.
 

34. 
Grinding quartz crystals down to produce sand is an example of a
a.
change of state.
c.
chemical reaction.
b.
chemical change.
d.
physical change.
 

35. 
The tendency of a less dense substance to float in a more dense liquid is called
a.
viscosity.
c.
sublimation.
b.
density.
d.
buoyancy.
 



 
Submit          Reset Help