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23.24 Unit 2 Review

Total questions: 100

Worksheet time: 56mins

Name
Class
Date
1.
__________ properties are any characteristic of matter that CANNOT be observed or measured without changing the identify of the substance.
a)
Chemical
b)
Physical
c)
Structural
d)
Characteristic
2.
__________ properties are any characteristic of matter that CAN be observed or measured without changing the identify of the substance.
a)
Chemical
b)
Physical
c)
Structural
d)
Characteristic
3.
Look at the picture below. What clue or evidence observed in the picture above indicates that a chemical change is probably occurring?
a)
light was released
b)
the color changed
c)
the temperature changed
d)
bubbles were produced
4.
Terry and Jean experimented with several items to see what would happen under different conditions. Below is the data they wrote at the conclusion of the experiment. Which substance changed CHEMICALLY under ALL 3 conditions?
a)
steel wool
b)
wood splinter
c)
paper
d)
copper wire
5.
A student mixes two clear solutions. Which of the following is evidence that a CHEMICAL REACTION is happening? (select ALL that apply) 1 - color change 2 - odor change/formation of gas (bubbles) 3 - colder temperature 4 - precipitate forms
a)
2 and 3 only
b)
1, 2, and 4 only
c)
1, 2, 3, and 4
d)
1 and 4 only
6.
When a candle burns, the ___________________ is evidence of a physical change, while the ___________________ is evidence of a chemical change.
a)
light given off, wax melting
b)
light given off, smoke produced
c)
wax melting, wick getting shorter
d)
wax melting, light given off
7.
What two types of matter are considered chemically pure substances?
a)
elements and compounds
b)
solutions and mixtures
c)
solutions and compounds
d)
elements and mixtures
8.
Is this mixture homogeneous or heterogeneous?
a)
Homogeneous
b)
Heterogeneous
9.
Which arrangement correctly orders mixtures in terms of INCREASING particle size? (INCREASING: Smallest Particle Size to Largest Particle Size)
a)
colloid, suspension, solution
b)
suspension, colloid, solution
c)
solution, colloid, suspension
d)
solution, suspension, colloid
10.
How would Carbon Tetrachloride (CCl4) be classified? This is one carbon chemically bonded to four chlorine atoms.
a)
element
b)
compound
c)
atom
d)
mixture
11.
How would Carbon (C) be classified?
a)
heterogeneous mixture
b)
pure substance
c)
homogeneous mixture
d)
none of them
12.
How would an 18 karat gold ring be classified? (18 karat gold means that the ring is NOT pure gold but 75% gold mixed UNIFORMLY throughout the melting process with other metals to make it strong.)
a)
homogeneous mixture
b)
pure substance
c)
heterogeneous mixture
d)
None of them
13.
Sand is floating in water, but most of the sand is settled at the bottom. Which type of mixture is this?
a)
Suspension
b)
Solution
c)
Solvent
d)
Colloid
14.
Identify the parts of a homogenous mixture as seen in the image below.
a)
A - Solution B - Solvent C - Solute
b)
A - Solvent B - Solute C - Solution
c)
A - Solvent B - Solution C - Solute
d)
A - Solution B - Solute C - Solvent
e)
A - Solute B - Solvent C - Solution
15.
In this type of mixture, the particles scatter light (Tyndall effect) but do not settle out upon standing (standing meaning "not moving")
a)
Solvent
b)
Solution
c)
Suspension
d)
Colloid
16.
Which of the following will show the Tyndall effect?
a)
oxygen gas
b)
Milk
c)
pure water
d)
sugar water
17.
Between 1770 and 1789 a French chemist, Antoine Lavoisier carried out experiments and discovered
a)
that in all experiments the mass of the materials will change when creating new substances that were not there before. This led him to create the Law of Conservation of Matter.
b)
that all experiments experience chemical and physical changes which led him to create the Law of Conservation of Matter.
c)
that all experiments performed in outer space orbit behaved differently than on Earth which led to chaos theory.
d)
that in an experiment particles are never created or destroyed which led to the Law of Conservation of Matter (aka: Law of Conservation of Mass).
18.
Table salt (NaCl) and sugar (C12H22O11) are dissolved in water. Table salt and sugar are both classified as a(n)
a)
Compound.
b)
Element.
19.
Since table salt and sugar are being dissolved in water, water is considered to be the ____________ as water is the substance doing the dissolving.
a)
solute
b)
solvent
20.
After mixing the two solids completely, we are making a clear, colorless mixture. Using a beam of light, we do not see the __________ effect.
a)
Tyndall
b)
Coriolis
21.

When sugar is dissolved in water, we create a solution. In a homogenous solution,the particles are ____________ .

a)

Large

b)

Medium

c)

Small

d)

None of the above

22.

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

a)

The powder DISSOLVED in the water

b)

The water turned the COLOR yellow

c)

The bag's TEMPERATURE changed

d)

The STATE OF MATTER changed

23.

Which of the following options provides evidence of a CHEMICAL change?

a)

Wood is burned releasing ash and smoke

b)

Rocks separate when soil is sifted

c)

Water turns to ice when you put it in the freezer

d)

Salt dissolves in water

24.

Which of the following examples provides evidence of a PHYSICAL change?

a)

Wood is burned and releases ash and smoke

b)

Iron rusts over time

c)

When mixed, baking soda and vinegar form gas bubbles

d)

A piece of paper changes shape when you rip it up

25.

A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?

a)

Physical change

b)

Chemical change

c)

No change

26.

Which observations prove a chemical change has occurred?

a)

Dissolving and expected color change

b)

Mixing and dissolving

c)

State of matter change and boiling water bubbles

d)

Unexpected color change and temperature change

27.

When mixing milk and vinegar, a white, chunky, solid substance is formed. What has occurred?

a)

Physical change: state of matter

b)

Chemical change: production of a solid (precipitate)

c)

Physical change: freezing

d)

Chemical change: rust

28.

When iron is exposed to air over a long period of time, it forms rust. This is an example of what?

a)

A new substance forming

b)

Color change: no new substance

c)

Shape change: no new substance

d)

Burning: a new substance

29.

When iron is exposed to air over a long period of time, it forms rust. This is an example of what?

a)

A new substance forming

b)

Color change: no new substance

c)

Shape change: no new substance

d)

Burning: a new substance

30.

A physical change...

a)

Changes the physical properties of an object, but does not create a new substance.

b)

Creates a new substance and cannot be undone.

31.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

32.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

33.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

34.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

35.

Melting a chocolate bar is a...

a)

Physical change

b)

Chemical change 

36.

Which of the following is NOT an example of a physical change?

a)

Crumpling paper

b)

Sharpening a pencil

c)

Clothes shrinking in the dryer

d)

Milk turning sour

37.

A change in which NEW substances are formed.

a)

Chemical change

b)

Physical change

38.

Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

39.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
40.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
41.

Can matter be created or destroyed during a chemical reaction?

a)

Yes

b)

No

c)

Sometimes

d)

I don't know

42.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
43.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
44.

All the matter is made up of

a)

Atoms

b)

Mixtures

c)

Compounds

d)

Reactions

45.

An element is formed by

a)

Atoms of the same kind

b)

Atoms of different kind

c)

compounds and atoms

d)

Compounds and mixtures

46.

IS a substance formed by atoms of a different kind

a)

Element

b)

Compound

c)

Mixtures

d)

Atoms

47.

A substance formed by different compounds and elements is a

a)

Pure substance

b)

Mixture

c)

Element

d)

Compound

48.

An element is a pure substance

a)

True

b)

False

49.

Which diagram represents an element?

a)

Diagram (a)

b)

Diagram (b)

c)

Diagram (c)

d)

None of the diagrams represent the parts of an element.

50.

Which of the following represents a compound?

a)

Diagram (a)

b)

Diagram (b)

c)

Diagram (c)

d)

All of the diagrams represent the parts of a compound.

51.

What type of material is pictured?

a)

Element

b)

Compound

c)

Homogeneous mixture

d)

Heterogeneous mixture

52.

What type of matter is shown in this particle diagram?

a)

Element

b)

Compound

c)

Mixture of Elements

d)

Mixture of Compounds

e)

Mixture of Elements and Compounds

53.

What type of matter is shown in this particle diagram?

a)

Element

b)

Compound

c)

Mixture of Elements

d)

Mixture of Compounds

e)

Mixture of Elements and Compounds

54.

What type of matter is shown in this particle diagram?

a)

Element

b)

Compound

c)

Mixture of Elements

d)

Mixture of Compounds

e)

Mixture of Elements and Compounds

55.

What type of matter is shown in this particle diagram?

a)

Diatomic Element

b)

Compound

c)

Mixture of Elements

d)

Mixture of Compounds

e)

Mixture of Elements and Compounds

56.

What phenomenon occurs when dispersed particle scatter light?

a)

Side effect

b)

Tyndall Effect

c)

Shaft Effect

d)

No Effect

57.

An example of suspension is ____ .

a)

Sugar and water

b)

Sand and water

c)

Salt and water

d)

Water

58.

It is homogeneous mixture because the substance or the material is soluble or miscible when mixed with water.

a)

Colloid

b)

Suspension

c)

Solution

d)

Ingredients

59.

A ______ is any material that can be dissolved by liquid.

a)

solvent

b)
solute
c)

element

d)

mixture

60.

A _______ is any substance that can dissolve a solute.

a)

solvent

b)

solute

c)

solution

d)

molecule

61.

A ___________ mixture has only one phase that is uniformly distributed throughout the mixture

a)
homogeneous
b)

heterogeneous

c)

compound

d)

element

62.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
63.

Is glass breaking a chemical or physical change?

a)
chemical
b)
physical
64.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
65.
Is frying an egg a physical or chemical change?
a)
chemical
b)
physical
66.
Salt dissolves in water
a)
physical Change
b)
chemical change
67.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
68.

What is a chemical change?

a)

How two chemicals react with one another when combined

b)

A property that we can measure or observe with our 5 senses or other tools

c)

When two chemicals react with one another to form a new substance

d)

When a change occurs but it does not result in the formation of a new substance

69.

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

a)

The powder DISSOLVED in the water

b)

The water turned the COLOR yellow

c)

The water's TEMPERATURE changed

d)

The STATE OF MATTER changed

70.

Which of the following examples provides evidence of a PHYSICAL change?

a)

Wood is burned and releases ash and smoke

b)

Iron rusts over time

c)

When mixed, baking soda and vinegar form gas bubbles

d)

Boiling water bubbles when heated

71.

When mixing milk and vinegar, a white, chunky, solid substance is formed. What has occurred?

a)

Physical change: state of matter

b)

Chemical change: precipitate

c)

Physical change: freezing

d)

Chemical change: new gas

72.

Reacts with acid: Chemical or Physical Property

a)
Chemical Property
b)
Physical Property
73.
Density: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
74.
Brittleness: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
75.

Sour taste: Chemical or Physical Property

a)
Chemical Property
b)
Physical Property
76.

Which one of these is a chemical property?

a)

Melting point

b)

Boiling point

c)

Color

d)

Toxicity

77.

Reacts with water: Chemical or Physical Property

a)
Chemical Property
b)
Physical Property
78.

Formation of a precipitate ... Physical or Chemical Change?

a)

Physical

b)

Chemical

79.

How would an 18 karat gold ring be classified? 

a)

homogeneous mixture

b)

pure substance

c)

heterogeneous mixture

d)

None of them

80.

Which of the following shows the Tyndall effect?

a)

Water

b)

Milk

c)

Honey

d)

Oxygen gas

81.

Between 1770 and 1789 a French chemist, Antoine Lavoisier carried out experiments and discovered

a)

that in all experiments the mass of the materials will change when creating new substances that were not there before. This led him to create the Law of Conservation of Matter.

b)

that all experiments experience chemical and physical changes which led him to create the Law of Conservation of Matter.

c)

that all experiments performed in outer space orbit behaved differently than on Earth which led to chaos theory.

d)

that in an experiment, particles are never created or destroyed which led to the Law of Conservation of Matter (aka: Law of Conservation of Mass).

82.

True or False? Sugar (C12H22O11) and salt (NaCl) are both compounds.

a)

True

b)

False

c)

Both

d)

Neither

83.

Dissolving table salt and sugar in water, water is considered to be the ____________ as water is the substance doing the dissolving.

a)

Solvent

b)

Solute

c)

Suspension

d)

Solution

84.

Physical or Chemical property? Tearing a piece of paper

a)

Physical

b)

Chemical

85.

Physical or Chemical change? The light given off when a candle burns

a)

Physical

b)

Chemical

86.

What two types of matter are considered chemically pure substances?

a)

elements and compounds

b)

solutions and mixtures

c)

solutions and compounds

d)

elements and mixtures

87.

Heterogeneous or Homogeneous? Salad Dressing

a)

Heterogeneous

b)

Homogeneous

88.

Physical or Chemical change? Candle wax melting when a candle burns.

a)

Physical

b)

Chemical

89.

Physical or Chemical change? Candle wax melting when a candle burns.

a)

Physical

b)

Chemical

90.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
91.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
92.
A compound is
a)
a force that allows elements to share, lose or gain electrons.
b)
the smallest part of a molecule.
c)
a substance that results when two or more elements join together.
d)
when two or more atoms join together.
93.
Which is an example of a solute?
a)
Milk
b)
Sugar
c)
Water
d)
Ginger Ale
94.
The flammability of a substance is 
a)
A. a chemical property.
b)
B. related to the density
c)
C. a physical property.-
d)
D. changeable.
95.
What is the simplest form that cannot be broken down to anything simpler? 
a)
element 
b)
solution
c)
compound
96.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
97.

When you dissolve sugar cubes in tea, the sugar cube is the __________.

a)

solute

b)

solvent

98.

Which of the following can be dissolved?

a)

salt

b)

sand

c)

black pepper powder

d)

pebbles

99.
Look at the diagram. In this diagram, the red dots represent
a)
the solute
b)
the solvent
c)
the solution
100.
Look at the diagram. In this diagram, the blue area represents
a)
the solute
b)
the solvent
c)
the solution

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