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Lesson 1 & 2 Review

Total questions: 50

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

This type of mixture has large enough particles that you can see the different types of particles.

a)

Homogeneous

b)

Heterogeneous

c)

Colloid

d)

Solution

2.

A colloid mixture does not have particles large enough to settle to the bottom, but they are large enough to

a)

be filtered out of the solution.

b)

be pulled out by hand.

c)

float to the top.

d)

scatter light waves.

3.

A mixture with such small particles that you cannot see the individual particles.

a)

Suspension

b)

Sublimation

c)

Heterogeneous

d)

Homogeneous

4.

This word means "the same throughout".

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

c)

Suspension Mixture

d)

Compound Mixture

5.

This words means "different throughout".

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

c)

Colloid Solution

d)

Compound Mixture

6.

Which of the following examples is a Heterogeneous mixture?

a)

Tap Water

b)

Beach Sand

c)

Vanilla Cake Mix

d)

Bottle of Cola

7.

Which of the following examples is a Homogeneous mixture?

a)

Tap Water

b)

Beach Sand

c)

Chocolate chip cookie

d)

Mud water

8.

Which of the following examples is a Colloid?

a)

Mud water

b)

Sprite

c)

milk

d)

Fog

9.

Which of the following examples is a Solution?

a)

Mud water

b)

Well water

c)

butter milk

d)

Fog

10.

Which of the following examples is a Suspension?

a)

Mud water

b)

Well water

c)

milk

d)

Fog

11.

Cooking an egg is an example of...

a)

A chemical change

b)

A physical change

c)

Melting

d)

Dissolving

12.

Melting ice is an example of...

a)

A physical change

b)

A chemical change

c)

Purification

d)

Magic

13.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
14.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
15.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
16.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
17.
What happens to atoms after a chemical change?
a)
They remain in the same place.
b)
They become bigger.
c)
They link up in different ways.
d)
They dissolve to form a mixture.
18.
A physical change can sometimes result in a color change. Which of the following situations show this?
a)
Milk turns yellow when it spoils.
b)
Dough becomes darker when it is baked into cake.
c)
A red candy dissolves and turns water pink.
d)
A match turns black when it is burned.
19.
Which of the following always results from a chemical reaction?
a)
Fire
b)
Bubbles
c)
A new substance that is a solid
d)
A new substance that can be a solid, liquid, or gas
20.
Chemistry is
a)
a characteristic of a substance that can be observed without changing the substance into another substance.
b)
the study of matter and how matter changes.
c)
anything that has mass and takes up space.
d)
a rapid reaction between oxygen and a substance called a fuel.
21.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
22.
A chemical reaction that absorbs energy in the form of heat is described as
a)
endothermic
b)
exothermic
c)
combustion
d)
unbalanced
23.
When heated, oxygen reacts with copper to form copper oxide:
If this reaction occurs in a sealed container, will the mass of the container and everything in it increase, decrease, or stay the same and why?
a)
The mass will stay the same because the number of each kind of atom stays the same.
b)
The mass will increase because a new kind of molecule is formed.
c)
The mass will decrease because two substances combine to form one substance.
d)
More information is needed to tell if the mass will change.
24.
What type of reaction is occurring in the diagram?  Which response below explains the reason for that type of reaction?
a)
Exothermic. Heat is released when the candle (wax) burns.
b)
Endothermic. Heat is released when the candle (wax) burns.
c)
Exothermic. Heat is taken in when the candle (wax) burns.
d)
Endothermic. Heat is taken in when the candle (wax) burns.
25.
If there are 4 H atoms on the reactant side, how many H atoms will be on the product side? 
a)
2
b)
4
c)
6
d)
You need more information to answer this question
26.

How many different elements are on the Product side of this equation?


2FeCl3 + 3MgO ---> Fe2O3 + 3MgCl2

a)

4

b)

8

c)

2

d)

214

27.
The reactants are on the left side of the chemical equation.
a)
True
b)
False
28.
Which side of a chemical equation is the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
29.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
30.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
31.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
32.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

33.

The initial temperature of the reactants was 20oC, and the final temperature was 45oC. The reaction was

a)

exothermic

b)

endothermic

34.
Surrounding temperature gets cold
a)
Endothermic
b)
Exothermic
35.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic Reaction

36.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic reaction

37.

The minimum amount of energy needed to get a chemical reaction started is called _______.

a)

Activation energy

b)

Concentration

c)

Catalyst

d)

Enzyme

38.

The amount of one material in a certain volume of another material is called _______.

a)

Activation energy

b)

Concentration

c)

Catalyst

d)

Enzyme

39.

A material that increases the rate of a chemical reaction by lowering the activation energy is called _______.

a)

Activation energy

b)

Concentration

c)

Catalyst

d)

Enzyme

40.

A material that decreases the rate of a reaction is called ______.

a)

Catalyst

b)

Inhibitor

c)

Combustion

d)

Fuel

41.

Catalyst that speeds up chemical reactions in living cells.

a)

enzyme

b)

catalyst

c)

inhibitor

d)

activation energy

42.

Indicate whether each of the following will: Increase / Decrease / have No effect on the rate of reaction.

 

                Increasing temperature

              

a)

Increase

b)

Decrease

c)

No Effect

43.

Indicate whether each of the following will: Increase / Decrease / have No effect on the rate of reaction.

 

                Decrease Particle Size              

a)

Increase

b)

Decrease

c)

No Effect

44.

Indicate whether each of the following will: Increase / Decrease / have No effect on the rate of reaction.

 

                Decrease Reactant Concentration             

a)

Increase

b)

Decrease

c)

No Effect

45.

The part of the solution that gets dissolved is:

a)

solute

b)

solvent

c)

colloid

d)

heterogeneous

46.

LOTION is an example of:

a)

solution

b)

colloid

47.

BRASS is made when copper dissolves in Zinc. This is an example of:

a)

solution

b)

colloid

48.

SMOKE is formed when solid particles of ash are suspended in the air. This is an example of a:

a)

solution

b)

colloid

49.

How many valence electrons are in an atom of Aluminum?

a)

13

b)

27

c)

3

d)

27-13=14

50.

An atom of Sulfur has 6 valence electrons. What does it need to become stable like Argon's electron configuration?

a)

It must gain 6 e-

b)

It must gain 2 e-

c)

It must lose 6e-

d)

It must lose 2 e-

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