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Worksheets

RSE1CH2526

Total questions: 125

Worksheet time: 3hrs 24mins

Name
Class
Date
1.
Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 
a)
Type of fertilizer
b)
Size of sunflower
c)
type of sun flower
2.
Molly investigated if the age of students caused them to be better drivers. What is the independent variable?
a)
Type of car
b)
Skill of driving
c)
Age of student
3.
Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the dependent variable.
a)
Color or chair
b)
Grade on test
c)
Age of students
4.
Sarah wanted to find out if the size of a car tire made it a smoother ride over bumps. What is the independent variable?
a)
Size of tire
b)
How smooth the ride was over bumps
c)
Type of car
5.
Penelope wanted to see if the temperature of the oven made cookies softer or harder. What is the independent variable.
a)
Hardness of cookie
b)
Type of oven
c)
Temperature of oven
6.
Ramone wants to know: does the distance a person kicks a soccer ball effect how well they will do on their math test.  What is the dependent variable?
a)
How far they kick the soccer ball
b)
who the person is
c)
how well they do on the math test
d)
Type of soccer ball.
7.
What would the INDEPENDENT variable be in an experiment testing which types of paper airplane goes furthest?
a)
the paper used
b)
the type of paper airplane
c)
the distance of each plane's flight
d)
how hard the plane is thrown
8.
Marcos wants to know: Does the type of gasoline put in a car effect how fast the car can drive? What is the independent variable?
a)
Type of gasoline
b)
which car the gas is put into
c)
how fast the car can drive
d)
how much gas is put into the car
9.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
10.
What step does every scientific experiment begin with?
a)
hypothesis
b)
question/problem
c)
procedures
d)
conclusion
11.
A combination that can be separated by physical processes is a .....
a)
Atom
b)
Compound
c)
Element
d)
Mixture
12.
What is a homogeneous mixture?
a)
a mixture that is the same throughout.
b)
a mixture that is made up of one type of atom.
c)
a mixture that is made up of one type of compound
d)
a mixture that cannot be separated through physical changes
13.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
14.
Kool-Aid
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
15.
NaCl
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
16.

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as

a)

decanting

b)

evaporation

c)

loading

d)

chromatography

17.

Amy and her brother, Sam, were on a school trip to a nearby seashore.Back at school Sam asked Amy, "How can we get the seaweed out?"

What do you think Amy and Sam should do to separate the seaweed and sand from their seawater?

a)

filter it

b)

evaporate it

c)

condense it

18.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
19.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
20.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds and elements
21.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
22.
These can only be separated by chemical means. 
a)
element 
b)
compound 
c)
mixture 
d)
stuff 
23.

Matter is defined as

a)

has mass

b)

has volume

c)

has mass and volume

d)

everything

24.
What type of mixture is this?
a)
heterogeneous 
b)
homogeneous
25.
A substance that is made up of only one kind of atom is a(an)
a)
compound
b)
homogeneous mixture
c)
element
d)
solution
26.
Two classifications of a pure substance are
a)
homogeneous and heterogeneous
b)
atoms and elements
c)
elements and compounds
d)
solutions and colloids
27.

Is this a physical or chemical change?

a)

Physical

b)

Chemical

28.

Bubbles form when water boils. Is this evidence of chemical change?

a)

Yes, because water is changing.

b)

Yes, because the water is reacting.

c)

No, because the vapor is still water.

d)

No, because water doesn't react with anything.

29.

Every chemical change involves __________.

a)

dissolving substances

b)

the release of light and heat

c)

an increase in density

d)

the formation of a new substance

30.

This is an example of _____ change.

a)

Physical

b)

Chemical

31.

Wood is chopped into small pieces. Then, it is burned to cook food. This is an example of a ____ change followed by a ____ change.

a)

chemical, physical

b)

physical, chemical

c)

physical, physical

d)

chemical, chemical

32.

True/False --- As this water boils, the release of a gas means a chemical change has occurred.

a)

True

b)

False

33.

Which of the following is a chemical property?

a)

volume

b)

magnetism

c)

temperature

d)

reactivity

34.

Most physical changes are ____.

a)

spontaneous

b)

chemical properties

c)

dangerous and require large amounts of energy

d)

reversible

35.
What is an example of a Chemical change?
a)
Ripped paper 
b)
boiled egg
c)
cracked egg
d)
sugar in water
36.
Which is a physical change?
a)
burning match 
b)
vinegar in baking soda 
c)
melting butter
d)
cooking an egg
37.
Jayden asked Gabe what she could do to an egg for a chemical change. Gabe answered correctly and said...
a)
You can drop the egg.
b)
You can cook the egg.
c)
You can crack the egg.
d)
You can paint the egg.
38.
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
39.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
40.
Which of the following is a physical property?
a)
Ability to react with oxygen
b)
Ability to rust
c)
Ability to burn
d)
Ability to conduct electricity
41.
Which of the following is an example of a chemical property?
a)
Melting point
b)
Density
c)
Color
d)
Ability to react with acid
42.

Qualitative observations

a)

are characteristics and descriptions

b)

have a number

43.

Quantitative observations

a)

are characteristics and descriptions

b)

use a number

44.

The temperature is 18 degrees Celsius today.


Is this a QUALITATIVE OR QUANTITATIVE observation?

a)

qualitative observation

b)

quantitative observation

45.

It is hot and sunny today.


Is this a QUALITATIVE or QUANTITATIVE observation?

a)

qualitative observation

b)

quantitative observation

46.

There are 16 birds in the tree.


Is this a QUALITATIVE or QUANTITATIVE observation?

a)

qualitative observation

b)

quantitative observation

47.

The tree's leaves are yellow and orange.


Is this a QUALITATIVE or QUANTITATIVE observation?

a)

qualitative observation

b)

quantitative observation

48.

What is the definition of replication in scientific research?

a)

Repeating the same experiment multiple times to ensure accuracy

b)

Exactly copying someone else's experiment

c)

Changing variables to see different results

d)

Using different methods to test the same hypothesis

49.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
50.
?
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
51.

Measurements: 24.9, 25.2, 25.1, 24.8

True Value: 25.0

These measurements are…

a)

Accurate, but not precise

b)

Precise, but not accurate

c)

Both precise and accurate

d)

Neither precise nor accurate

52.

Which student is the most ACCURATE?

a)

A

b)

B

c)

C

53.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
54.
Determine the number of Significant Figures in 506020-km.
a)
5
b)
4
c)
3
d)
2
55.
How many sig figs are there?
100.00
a)
1
b)
3
c)
4
d)
5
56.
How many sig figs are there?
100000000
a)
1
b)
9
c)
10
57.
How many sig figs are there?
4004
a)
1
b)
2
c)
3
d)
4
58.
Change from standard form to scientific notation: 12,000,000
a)
12.0  x  107
b)
0.12  x  107
c)
1.2  x  106
d)
1.2  x  107
59.
Change from standard form to scientific notation:  0.000398
a)
39.8  x  10-5
b)
3.98  x  10-5
c)
3.98  x  10-4
d)
39.8  x  10-6
60.
Change from standard form to scientific notation: 0.004078
a)
4.078  x  10-3
b)
4.078  x  103
c)
40.78  x  10-4
d)
.4078  x  10-2
61.
Try to change the number back to standard form:  6.79  x  104
a)
679,000
b)
6,790
c)
67,900
d)
6,790,000
62.

A block has a mass of 20.0 g and a volume of 40.0 cm3. What is its density?

a)

2.0 g/cm3

b)

1.2 g/cm3

c)

0.5 g/cm3

d)

4.0 g/cm3

63.
The mass of an object is 30 g.  The volume is 5 mL.  What is the density of this object?
a)

3 g/cm

b)
6 g/mL
c)

8 g

64.
If you have a gold brick that is 2 cm by 3 cm by 4 cm and has a density of 19.3 g/cm3, what is its mass?
a)

263.5 g/cm3

b)
463.2 g
c)
0.804 kg
d)

2.804 g

65.
A bar of copper has a mass of 216g and a volume of 24cm3. What is the density of copper?  
a)
9g/cm3
b)
.11g/cm3
c)
5184g/cm3
d)
322mL
66.

How many protons are in Sodium?

a)

11

b)

22

c)

12

d)

33

67.

How many electrons are in Aluminium?

a)

40

b)

27

c)

13

d)

14

68.

How many neutrons are in Magnesium?

a)

36

b)

12

c)

24

d)

6

69.

 What particles are found in the nucleus of an atom? 

a)

protons and neutrons    

b)

neutrons and electrons  

c)

protons and electrons

d)

ions and neutrons

70.
What particle provided the positive charge for an atom?
a)
proton 
b)
neutron
c)
electron
d)
nucleus
71.

What are ions?

a)

Neutral atom

b)

colorful atoms

c)

Charged Atoms

d)

None of them

72.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
73.
What atom matches this electron configuration?
1s2 2s2 2p6 3s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
74.
Which is the electron configuration for an oxygen atom?
a)
1s22s22p63s23p64s2
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p6
75.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
76.
What is the shorthand electron configuration for Sulfur atom?
a)
[Ar] 3p4
b)
[He] 3s23p4
c)
[Ne] 3s23p4
d)
[Na] 3s23p3
77.
How many valence electrons does Chlorine have?
a)
5
b)
2
c)
7
d)
5
78.
How many valence electrons does phosphorus have?
a)
5
b)
2
c)
8
d)
15
79.
Which element is pictured?
a)
neon
b)
fluorine
c)
magnesium
d)
argon
80.
Identify the element in Period 5 that has 1 valence electron?
a)
Rb
b)
Nb
c)
Ag
d)
Sb
81.

How many valence electrons does Magnesium (Mg) have?

a)

12

b)

10

c)

2

d)

4

e)

24

82.

How many valence electrons does Potassium (K) have?

a)

1

b)

11

c)

19

d)

18

e)

39

83.

Valid Lewis dot diagram?

a)

True

b)

False

84.

Valid Lewis dot diagram?

a)

True

b)

False

85.

Valid Lewis dot diagram?

a)

True

b)

False

86.

A bond between a metal and a nonmetal is called a(n)

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

transfer bond

87.

A bond between a nonmetal and a nonmetal is called a(n)

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

transfer bond

88.

Identify the following compound as ionic or covalent: MgO

a)

ionic

b)

covalent

89.

Identify the following compound as ionic or covalent: CF4

a)

ionic

b)

covalent

90.

Identify the following compound as ionic or covalent: CO

a)

ionic

b)

covalent

91.

Name the ionic compound, LiCl

a)

lithium chlorine

b)

lithium chloride

c)

lithium chlorate

d)

lithium monochloride

92.

Name the ionic compound, CaCO3

a)

calcium carbide

b)

calcium carbon trioxide

c)

calcium carbon oxide

d)

calcium carbonate

93.

Name the ionic compound, FeBr3

a)

Iron (II) bromide

b)

Iron (III) bromide

94.
K20 - name?
a)
potassium dioxide
b)
potassium oxide
c)
potassium oxygen
d)
dipotassium dioxide
95.

What is the formula for diphosphorus pentoxide?

a)

P2O5

b)

PO5

c)

P5O2

d)

Po2O5

96.

What is the chemical formula of sulfur hexabromide?

a)

SBr₆

b)

S₆Br

c)

S(VI)Br

d)

SBr4

97.
What is the correct formula for dinitrogen tetroxide?
a)
N₃O₃
b)
(N₂)₂(O₄)₃
c)
N₂O₄
d)
N₄O₂
98.
What is the formula for magnesium chloride?
a)
MgCl
b)
Mg2Cl
c)
MgCl2
d)
Mg(ClO3)2
99.
The chemical formula of magnesium hydroxide is
a)
MgOH₂
b)
Mg(OH)₂
c)
Mg(OH)
d)
MgH₂
100.

Aluminum fluoride is...

a)

AlF3

b)

Al3F

c)

FAl3

d)

F3Al

101.

What is the charge for a nitrogen ion?

a)

+1

b)

+3

c)

-1

d)

-3

102.

What is the charge for a calcium ion?

a)

+2

b)

-2

c)

+1

d)

-1

103.

What is the charge for a beryllium ion?

a)

+2

b)

-2

c)

+4

d)

-1

104.

What is a positive ion called?

a)

anion

b)

cation

c)

isotope

d)

covalent

105.

What is a negative ion called?

a)

anion

b)

cation

c)

covalent

d)

isotope

106.

How many electrons would a Nitrogen ion gain/lose? If it has 5 valence electrons.

a)

lose 5

b)

gain 5

c)

lose 3

d)

gain 3

107.

If an atom loses electrons, the charge will be positive.

a)

true

b)

false

108.

Which element has the larger radius?

a)

Li

b)

Na

c)

K

109.

Which element has the largest radius?

a)

Al

b)

Si

c)

P

110.

As you move across the periodic table, from left to right, the metallic character of the elements________

a)

increases

b)

decreases

c)

stays the same

111.

Which has a lower ionization energy: Lithium or Potassium?

a)

Lithium

b)

Potassium

112.

Which atom has the most valence electrons

a)

Ca

b)

C

c)

Cl

d)

Si

113.

As you move across a period, do the atoms get smaller or larger?

a)

smaller

b)

larger

114.

Which atom is more electronegative?

a)

K

b)

Rb

c)

Cl

d)

B

115.

As atoms in Group 15 are considered in order from top to bottom, the electronegativity of each successive element....

a)

increases

b)

decreases

c)

remains the same

d)

none of the above

116.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
117.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
118.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
119.

What is the right part of a chemical equation called...

H2 + O2 --> H2O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

120.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Al + __O2--> __Al2O3
a)
4,1 --> 2
b)
4,3 --> 4
c)
3,4 --> 1
d)
4,3 --> 2
121.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2SO3 + __KOH--> __H2O+ __K2SO3
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
122.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2 + __S --> __H2S
a)
1,1 --> 1
b)
2,2 --> 2
c)
1,2 --> 1
d)
1,2 --> 2
123.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__AgNO3 + __H2S --> __Ag2S+ __HNO3
a)
2,1 --> 1,2
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
124.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH4 + __O2 --> __CO2+ __H2O
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
125.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

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