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Unit 1-5 Review

Total questions: 181

Worksheet time: 2hrs 45mins

Name
Class
Date
1.

What two gases/compounds are formed by the process represented by the model?

a)

methane and water

b)

nitrogen and carbon dioxide

c)

carbon dioxide and water

d)

nitrogen and water

2.

What is wrong with the following model?

a)

the two labeled gases are switched

b)

the labeled food should be a gas

c)

the labeled energy should be food

d)

the labeled water should be energy

3.

What is the process called that uses sunlight to produce sugar?

a)

cellular respiration

b)

photosynthesis

c)

anaerobic respiration

4.

What is the process called that uses sugar to produce energy?

a)

anaerobic respiration

b)

photosynthesis

c)

cellular respiration

5.

What is the process that does not use oxygen to transfer large amounts of energy quickly?

a)

photosynthesis

b)

cellular respiration

c)

anaerobic respiration

6.

What is the pigment that absorbs light energy and helps make glucose?

a)

melanin

b)

chlorophyll

c)

hemoglobin

d)

bilirubin

7.

What reactants does a plant need to make glucose through photosynthesis?

a)

sugar and oxygen

b)

carbon dioxide and sugar

c)

carbon dioxide, sunlight, and water

d)

oxygen and water

8.

What is involved in beginning the step of photosynthesis?

a)

The roots bring in water and nutrients

b)

The stomata bring in carbon dioxide

c)

Glucose is produced in the chloroplast

d)

Chlorophyll in the leaf captures light energy

9.

What process is being demonstrated by the model?

a)

anaerobic respiration

b)

photosynthesis

c)

cellular respiration

10.

What happens to an oxygen molecule when it is created during photosynthesis?

a)

It will be released to the atmosphere

b)

It will be used by an animal for cellular respiration

c)

It will be used by the plant for photosynthesis

d)

It will be released to the leaves

11.

What two ways can animals release carbon back into the cycle?

a)

photosynthesis

b)

decomposition

c)

cellular respiration

d)

factory emissions

e)

burning of fossil fuels

12.

What gas has greatly increased over time according to the model?

a)

Argon

b)

Methane

c)

Nitrogen

d)

Oxygen

13.

What gas has greatly decreased over time, according to the model?

a)

Methane

b)

Argon

c)

Carbon Dioxide

d)

Oxygen

14.

What are the living parts of an environment known as?

a)

biotic factor

b)

abiotic factor

c)

photosynthesis

d)

cellular respiration

15.

The non living parts of an environment

a)

biotic factors

b)

abiotic factors

c)

photosynthesis

d)

cellular respiration

16.

Which relationship is correct?

a)

glucose is a product of cellular respiration

b)

water is a reactant in cellular respiration

c)

oxygen is a product of photosynthesis

d)

carbon dioxide is a product of photosynthesis

17.

Yeast in sugar is an example of which process and what gas is produced?

a)

cellular respiration, carbon dioxide

b)

anaerobic respiration, carbon dioxide

c)

photosynthesis, oxygen

d)

anaerobic respiration, oxygen

18.

Look at the image and determine the correct response to the presentation

a)

This graphic is correct as it shows that animals and plants produce carbon dioxide through cellular respiration and plants produce oxygen through photosynthesis.

b)

This graphic is incorrect as it shows that animals and produce oxygen through cellular respiration and plants produce carbon dioxide through photosynthesis.

c)

This graphic is incorrect as it shows that only plants produce carbon dioxide through cellular respiration and animals produce oxygen through photosynthesis.

d)

This graphic is correct as it shows that only animals produce carbon dioxide through cellular respiration and plants produce oxygen through cellular respiration.

19.

Where does anaerobic respiration occur in animal cells?

a)

nucleus

b)

cytoplasm

c)

ribosomes

d)

mitochondria

20.

What does anaerobic mean?

a)

with oxygen

b)

without oxygen

c)

produces energy

d)

requires energy

21.

How is carbon dioxide used in the process of photosynthesis?

a)

Glucose and oxygen gas are broken down and the atoms of each element are rearranged making water and releasing carbon dioxide gas.

b)

Carbon dioxide gas is absorbed by the plant and broken down and rearranged with atoms from water making glucose and releasing oxygen gas as a waste product.

c)

Hydrogen gas and oxygen gas are broken down and rearranged to make water.

d)

Methane gas is rearranged and broken down to create carbon dioxide gas for plants to release during photosynthesis.

22.

Which image represents a gas given off by plants as a waste product during photosynthesis?

a)
b)
c)
d)
23.

Bromothymol Blue turns blue when carbon dioxide is not present in the water, and it turns yellow-green when carbon dioxide is present.

What color would you look for to prove that Elodea is undergoing photosynthesis?

a)

the water should be more yellow-green, because carbon dioxide is consumed during photosynthesis.

b)

the water should be more blue, because carbon dioxide is consumed during photosynthesis.

c)

the water should be more green, because oxygen is produced during cellular respiration.

d)

the water should be more yellow green because oxygen is produced during cellular respiration.

24.

Which image represents a greenhouse gas that plants use to make food through the process of photosynthesis?

a)
b)
c)
d)
25.

Which of the following are reactants of photosynthesis?

a)

CO2 and H2O

b)

O2

c)

H2O and Glucose

d)

None of the above

26.

In which organelle does photosynthesis occur?

a)

Cell Wall

b)

Chlorophyll

c)

Chloroplast

d)

Cytoplasm

27.

What are the end products of photosynthesis?

a)

Carbon Dioxide and Water

b)

Glucose and Carbon Dioxide

c)

Oxygen and Glucose

d)

Water and Glucose

28.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
CO2 + light + H2O --> O2 + Sugar
b)
CO2 + sugar + H2O --> O2 + light
c)
O2 + light + H2O --> CO2 + Sugar
d)
CO2 + O2 + H2O --> Light+ Sugar
29.

What is a similarity and difference between aerobic and anaerobic respiration?

a)

aerobic and anaerobic are similar because they both require oxygen but aerobic produces more energy.

b)

aerobic and anaerobic are similar because they both require glucose but aerobic produces less energy.

c)

aerobic and anaerobic are similar because they both require carbon dioxide but aerobic produces more energy.

d)

aerobic and anaerobic are similar because they both require glucose but aerobic produces more energy.

30.

What two products formed from this model?

a)

glucose and oxygen

b)

carbon dioxide and water

c)

carbon dioxide and oxygen

d)

oxygen and water

31.

This organelle performs

a)

cellular respiration

b)

photosynthesis

c)

anaerobic respiration

32.

This organelle performs

a)

photosynthesis

b)

anaerobic respiration

c)

cellular respiration

33.

Which if the following is described as being pure substances?

a)

elements

b)

compounds

c)

elements and compounds

d)

mixtures

34.

Which of the following describes a substance that has been physically combined and is NOT uniform throughout (you see the DIFFERENT parts that make it up)?

a)

Homogeneous Mixture

b)

Compound

c)

Heterogeneous mixture

d)

element

35.

What is the smallest part of a compound that retains the properties of that compound

a)

atom

b)

element

c)

Molecule

d)

mixture

36.

A student is observing a substance that contains multiple element that have been chemically combine C6H12O6(SUGAR). Which of the following best describes what the student is observing?

a)

Heterogeneous Mixture

b)

Homogeneous Mixture

c)

Element

d)

Compound

37.

What is the smallest part of an element that retains the properties of the element?

a)

atom

b)

molecule

c)

compound

d)

subatomic particles

38.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
d)

atom

39.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
d)

atom

40.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
d)

atom

41.

This substance can be separated by physical means such as filtering, sifting, and evaporating.

a)

Mixtures

b)

Pure Substances

c)

Elements

d)

Compounds

42.
What type of mixture is this?
a)
homogenous mixture
b)
chemical
c)
heterogeneous mixture 
d)
solid mix
43.

What kind of mixture is shown in the picture?

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

44.

When one or more substance is combined CHEMICALLY it is called __________________.

a)

compound

b)

element

c)

mixture

d)

solution

45.
Contains only one kind of atom.
a)
Element
b)

Compound

c)
Mixture
46.

totally new properties from the original elements

a)

diatomic

b)

chemical change

c)

metalloids

d)

mixture

47.

the vertical groups are

a)

diatomic molecules

b)

similar in properties

c)

called periods

d)

compounds

48.

the noble gases are noted for being

a)

mixture

b)

unreactive

c)

diatomic element

d)

monatomic element

49.

As you go down a group, boiling points tend to

a)

monatomic element

b)

similar in properties

c)

increase

d)

diatomic element

50.

able to be hammered into thin sheets

a)

similar in properties

b)

compound

c)

malleable

d)

chemical change

51.

able to be worked into wires

a)

chemical change

b)

malleable

c)

unreactive

d)

ductile

52.

has properties of both metals and nonmetals

a)

malleable

b)

diatomic

c)

metalloids

d)

mixture

53.

The chart scientists use to organize and classify all the known elements

a)

periodic table

b)

period

c)

group

d)

chemical change

54.

The family of elements in a column on the periodic table

a)

noble gases

b)

metalloids

c)

groups

d)

metals

55.

when elements keep their individual properties, such as mixtures or when they change from one state of matter to the next

a)

metals

b)

chemical change

c)

physical change

d)

nonmetals

56.

when elements are chemically combined and they form all new properties

a)

chemical change

b)

period

c)

flammable

d)

nonmetals

57.

The ability of a substance to burn

a)

nonmetals

b)

flammable

c)

period

d)

periodic table

58.

The name given to a row of the periodic table

a)

nonmetals

b)

groups

c)

periodic table

d)

period

59.

A shiny, malleable, dense substance that easily conducts heat and electricity

a)

metals

b)

groups

c)

physical change

d)

flammable

60.

Elements that don't have the characteristics of metals; dull, brittle, poor conductors

a)

groups

b)

nonmetals

c)

physical change

d)

metals

61.

Elements that exhibit both metallic and nonmetallic properties; shiny, brittle, semiconductor

a)

metalloids

b)

nonmetals

c)

noble gases

d)

flammable

62.

An unreactive family on the periodic table

a)

noble gases

b)

physical change

c)

metalloids

d)

chemical change

63.

Which elements can be found in section 1?

a)

Metals (Alkali and Alkaline Earth)

b)

Metals (Transition and Other)

c)

Metalloids

d)

Non-Metals (including halogens and noble gases)

64.

Which elements can be found in section 2?

a)

Metals (Alkali and Alkaline Earth)

b)

Metals (Transition and Other)

c)

Metalloids

d)

Non-Metals (including halogens and noble gases)

65.

Which elements can be found in section 3?

a)

Metals (Alkali and Alkaline Earth)

b)

Metals (Transition and Other)

c)

Metalloids

d)

Non-Metals (including halogens and noble gases)

66.

Which elements can be found in section 4?

a)

Metals (Alkali and Alkaline Earth)

b)

Metals (Transition and Other)

c)

Metalloids

d)

Non-Metals (including halogens and noble gases)

67.

Which section can elements that have both metallic and nonmetal properties be found?

a)

1

b)

2

c)

3

d)

4

68.

Which section can elements that are shiny, malleable, and good conductors of heat/electricity be found? (Select all that apply)

a)

1

b)

2

c)

3

d)

4

69.

Which section can elements that are not shiny, not malleable and not good conductors of heat/electricity be found?

a)

1

b)

2

c)

3

d)

4

70.

Which section can non-reactive elements be found?

a)

1

b)

2

c)

3

d)

4

71.

An element is found to to be shiny and reactive by bubbling and sparking in water.  Which family would this element belong to?

a)

Metals (Alkali and Alkaline Earth)

b)

Metals (Transition and Other)

c)

Metalloids

d)

Non-Metals (including halogens and noble gases)

72.

Which elements would have similar properties to Chlorine (Cl)?

a)

fluorine (F) and iodine (I)

b)

sulfur (S) and argon (Ar)

c)

oxygen (O) and bromine (Br)

d)

magnesium (Mg) and phosphorous (P)

73.

Elements in the same group, such as helium, neon, argon, and krypton, are put together because...

a)

they all have similar chemical properties

b)

they all have the same atomic number

c)

they are all metals

d)

they all have the same number of valence electrons

74.

How many valence electrons does Chlorine have?

a)

7

b)

17

c)

2

d)

10

75.

How many valence electrons does Neon have?

a)

8

b)

18

c)

2

d)

10

76.

If Nitrogen (N) is in group 15, how many valence electrons does it have?

a)

5

b)

15

c)

2

d)

7

77.

If Calcium (Ca) is in group 2, how many valence electrons does it have?

a)

4

b)

20

c)

2

d)

10

78.

How many valence electrons does Magnesium (Mg) have?

a)

8

b)

12

c)

2

d)

10

79.

If Boron (B) is in group 13, how many valence electrons does it have?

a)

3

b)

13

c)

5

d)

10

80.

Which element has more valence electrons, Potassium (K) or Oxygen (O)?

a)

Potassium (K)

b)

Oxygen (O)

81.

The molecule is best identified as

a)

an elemental molecule

b)

a diatomic molecule

c)

a monoatomic element

d)

an ionic bond

82.

This model best represents: select two!

a)

a diatomic element

b)

a monoatomic element

c)

an elemental molecule

d)

a mixture

e)

a pure substance

83.

The best label for the model is

a)

a mixture

b)

a pure substance

c)

a mixture of compounds

d)

a mixture of elemental molecules

e)

a mixture of diatomic molecules

84.

The model best represents

a)

a compound molecule

b)

an elemental molecule

c)

a diatomic molecule

d)

a mixture

85.

The model best represents

a)

a diatomic molecule

b)

a monoatomic element

c)

an elemental molecule

d)

a mixture

86.

Which model represents a monoatomic elemental pure substance?

a)

a

b)

b

c)

c

87.

Which model represents a mixture?

a)

a

b)

b

c)

c

88.

Which model represents a compound?

a)

a

b)

b

c)

c

89.

In which section of the periodic table would you find substances that are shiny and conduct electricity? Select two.

a)

1

b)

2

c)

3

d)

4

90.

In which section of the periodic table would you find substances that are dull and brittle?

a)

1

b)

2

c)

3

d)

4

91.

In which section of the periodic table would you find substances that have both metallic and non metallic properties?

a)

1

b)

2

c)

3

d)

4

92.

This model represents

a)

a mixture of two compounds

b)

a mixture of a compound and an elemental molecule

c)

a pure substance

d)

a mixture of a diatomic molecule and an elemental molecule

93.

Which experimental results show a mixture?

a)

Simon applies heat to a liquid and the liquid turns into a gas.

b)

Marcus removes heat from a liquid. The liquid freezes into a solid.

c)

Ruth applies heat to a substance. The substance changes color and produces a gas.

d)

Lola applies heat to a substance. The liquid boils away and leaves behind large black crystals.

94.

Which option contains only monoatomic elements?

a)

Au, Ni, Cu, Fe

b)

NH3, KNO3, Hg, Ne

c)

H20, H2O2, H3O, CO2

d)

Na, NaCl, Pb, C6H12O6

95.

Which element would have a similar boiling point as sulfur (16)

a)

Iron (Fe) 26

b)

Potassium (K) 19

c)

Selenium (Se)34

d)

Lithium (Li) 3

96.

Brass was heated in an experiment. When brass was heated it separated into copper and zinc. Which statement best identifies brass?

a)

Brass is a pure substance

b)

Brass is an element

c)

Brass is a mixture

d)

Brass is a diatomic molecule

97.

The chemical formula for glucose is C6H12O6. Which statement best identifies glucose?

a)

Glucose is a monoatomic element.

b)

Glucose is a diatomic molecule.

c)

Glucose is a compound.

d)

Glucose is an elemental molecule.

98.

Which of the following is a molecule but not a compound?

a)

NH3

b)

H2

c)

H2O

d)

H

99.

Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium are all group 2 elements. Which statement best identifies why those elements are grouped together?

a)

They are all non metals

b)

They are all very reactive metals with similar chemical properties.

c)

They are all nonreactive gases with similar physical properties.

d)

Their atoms all have eight electrons in their outer energy levels.

100.

The chemical symbol for Mercury is Hg. Which statement best identifies Mercury?

a)

Mercury is a monoatomic element.

b)

Mercury is a compound.

c)

Mercury is a diatomic molecule.

d)

Mercury is a mixture.

101.

A pure substance

a)

can be an element

b)

can be a compound

c)

can be a mixture

d)

can be multiple compounds

e)

can be multiple elements

102.

A mixture

a)

can be a single element

b)

can be a single compound

c)

can be a pure substance

d)

can be multiple compounds

e)

can be multiple elements

103.

Which of the following best describes a non metal?

a)

brittle, not shiny, does not conduct electricity

b)

strong, shiny, does conduct electricity

c)

has both the characteristics of a metal and a non metal

d)

brittle, shiny, conducts electricity

104.

Which of the following is a molecule but NOT a compound?

a)

water (H2o)

b)

Oxygen gas (O2)

c)

Baking Soda (NaHCO3)

d)

Nobidium (Nb)

105.

The chemical symbol for iron is Fe. What can you determine about iron from its chemical symbol?

a)

It is an element

b)

It is a compound

c)

It is a mixture

d)

It is a diatomic molecule

106.

Which of the following demonstrates a chemical change has occurred?

a)

a color change, a gas is produced, and/or a strong odor

b)

the properties remain the same as the substances that make up a mixture

c)

the substance has changed into a new state of matter

107.

The chemical formula for vinegar is CH3COOH. What can you determine about vinegar from its chemical formula?

a)

It is an element.

b)

It is a diatomic molecule

c)

It is a compound

d)

It is a mixture

108.

The elements most similar to potassium on the periodic table

a)

will be the closest to it on the periodic table

b)

will be the farthest away from it on the periodic table

c)

will be the non metals

d)

will be the transition metals

109.

Properties like boiling point and melting point are most similar in a

a)

group, then in a period

b)

period, then in a group

c)

all metals have the exact same properties

d)

there is no correlation between properties and location on the periodic table.

110.

What is the general trend shown in this graph?

a)

As year increased, CO2 increased

b)

As year decreased, CO2 increased

c)

As year increased, methane increased

d)

As year increased, methane decreased

111.

What is the dependent variable in this graph?

a)

Methane Concentration

b)

years

c)

CO2 concentration

d)

Sea Ice Extant

112.

What is the overall trend shown on this graph?

a)

Sea Ice extant decreased in summer but not winter.

b)

Sea Ice extant increased in both summer and winter.

c)

Sea Ice extant increased in summer but decreased in winter

d)

Sea Ice extant decreased in both summer and winter

113.

What is the independent variable in this graph?

a)

CO2 concentration

b)

years

c)

methane

d)

time

114.

How did the Industrial Revolution affect climate?

a)

It produced more CO2 which caused temperatures to rise.

b)

It produced higher temperatures which produced more CO2

c)

It did not affect climate at all.

d)

The industrial revolution and the ice age both produced the same amount of CO2 which caused climate change.

115.

What is the relationship between the two variables shown on the graph?

a)

As temperatures rise, CO2 levels decrease

b)

As CO2 levels rise, temperature decreases.

c)

As CO2 levels rise, temperature also rises.

d)

Temperature and CO2 levels have no correlation.

116.

This graph shows that as the years increase

a)

sea levels rise

b)

CO2 levels increase

c)

the larger the glaciers grow

d)

the more mass is lost by glaciers

117.

Which country would have the most effect worldwide if there was a change in plastic handling?

a)

United States

b)

China

c)

Norway

d)

Egypt

118.

According to the graph, which gas is the most responsible for greenhouse gas emissions?

a)

CO2

b)

methane

c)

CFC

d)

HFC

119.

According to the infographic, what is happening to glaciers?

a)

They are increasing

b)

They are decreasing

c)

They are not changing

d)

They are increasing and decreasing

120.

What shows an accurate cause and effect scenario for global warming?

a)

rising temperatures--> rising CO2 levels --> droughts--> wildfires

b)

rising CO2 levels-->rising temperatures-->melting glaciers-->rising sea levels

c)

food shortages--> droughts--> wildfires

d)

melting glaciers --> rising temperatures--> rising CO2 levels

121.

Which statement is true about greenhouse gases?

a)

global warming is not due to greenhouse gases

b)

Rising temperatures are due to the sun growing larger not greenhouse gases

c)

Greenhouse gases are only carbon monoxide and methane

d)

Greenhouse gases trap heat on earth causing rising temperatures

122.

What is one effect of aerosol cans?

a)

They emit CFC's

b)

They cause droughts

c)

They use oxygen

d)

They melt glaciers

123.

Deforestation

a)

prevents trees from producing CO2

b)

prevents trees from using oxygen

c)

prevents trees from producing oxygen and taking up CO2

d)

prevents trees from producing CO2 and taking up oxygen

124.

Sustainability is

a)

producing CO2

b)

the cutting down of forests

c)

using everything as fast as possible

d)

using a resource responsibly so that it doesn't run out

125.

When human-made chemicals and garbage find their way into nature and harm the air, soil, and water it is called

a)

pollution

b)

habitat destruction

c)

overexploitation

d)

climate change

126.
Why are fossil fuels a nonrenewable resource? 
a)
they take millions of years to replace 
b)
they can be used over and over again
c)
they are used to heat and light homes 
d)
they cause air and water pollution 
127.
Which group includes ALL renewable resources?
a)
Coal, trees, water, oil
b)
Water, wind, sun, plants
c)
Minerals, sun, natural gas, water
128.

1. What are renewable resources?

a)

. Resources that are used faster than they form

b)

resources that can replenish themselves over time

c)

resources that formed over millions of years

d)

resources that exist only in rural areas

129.

According to the graph, what material’s recycling would reduce the largest portion of America’s trash?

a)

Metals

b)

paper

c)

plastics

d)

Yard trimmings

130.

1. Which of the following is not a renewable resource?

a)

coal

b)

wind energy

c)

solar energy

d)

water

131.

What is global warming

a)

the normal temperature fluctuations of Earth's climate cycle

b)

the melting of the polar ice caps

c)

the trend of increasing temperatures on Earth

d)

the changes in Earth's biosphere that affect the atmosphere

132.

1. Why might an introduced animal species overrun native species in an ecosystem?

a)

. Its population size is smaller than those of native species.

b)

. It is more energy efficient, so it eats less food.

c)

It is a predator of the native species.

d)

It often has no natural enemies

133.
What are greenhouse gases?
a)
gases that cause climate change
b)
gases that emit green smoke
c)
gases that are used to make green colored glass
134.
The main human activity that releases greenhouse gases is
a)
using bottled water
b)
burning fossil fuels
c)
texting on cellphones
d)
eating meat
135.
Which of the following have been linked to climate change?  
a)
droughts
b)
flooding
c)
melting of polar ice caps
d)
all of the above
136.
Some greenhouse gases are naturally present in the Earth's atmosphere
a)
True
b)
False
137.

What is the direct cause of rising sea levels?

a)

Melting Sea Ice

b)

Melting Land Ice

c)

Climate Change

138.

Floating sea ice melts...

a)

and causes sea levels to rise because it adds water to the ocean.

b)

but does not cause sea levels to rise because the ice displaces the same amount of ocean water as the melted ice would displace.

139.
Which of the following is the best conclusion that can be made from this graph?
a)
atmospheric carbon dioxide levels have been decreasing since 1960
b)
Hawaii has a lot of carbon dioxide
c)
humans have been working hard to decrease carbon dioxide levels
d)
atmospheric carbon dioxide levels have increased steadily since 1960
140.
What gas from the list below is a cause for global warming?
a)
Urethane
b)
Oxygen
c)
Carbon Dioxide
141.
How does the concentration of carbon dioxide in the atmosphere affect climate?
a)
As carbon dioxide concentrations increase, temperatures increase
b)
As carbon dioxide concentration increase, temperatures decrease.
c)
Carbon dioxide concentrations have no affect on climate
d)
As carbon dioxide concentrations increase, temperatures become more random.
142.
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
143.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
144.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
145.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same  number of atoms
c)
Same subscripts
d)
Same coefficients
146.

How many different elements are in the compound?

a)

1

b)

2

c)

3

d)

4

147.

How many atoms of sulfur are in the compound?

a)

5

b)

1

c)

3

d)

15

148.

How many molecules of water are there in  3H2O ?

a)
6
b)
2
c)
3
d)
5
149.

The mass of the reactants and the mass of the products...

a)

must decrease

b)

must be the same

c)

must increase

d)

will increase or decrease depending on the chemicals being used

150.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
151.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
152.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
153.
What types of systems are there?
a)
Mechanical and Electrical Systems
b)
Inside and Outside Systems
c)
Open and Closed Systems
d)
Human and Machine Systems
154.
This type of system allows matter to flow freely in and out...
a)
Closed System
b)
Open System
155.
A boiling pot with a lid on it to keep in the energy is what type of system?
a)
Closed System
b)
Open System
156.
Measure of the amount of matter 
a)
mass
b)
volume
c)
weight
d)
density
157.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
158.
Since gasses weigh nothing, when they are produced in a reaction they do not have to be accounted for.  
a)
True
b)
False
159.

Is this equation balanced...O3 ---> O + O2?

a)

no

b)

partially

c)

yes

d)

not enough information to tell

160.

Does this equation follow the law of conservation of mass...P4 + O3 ---> 2 P2O3?

a)

yes

b)

partially

c)

no

d)

not enough information to tell

161.
Which are the reactants in the following reaction?
2Mg + O2 ---> 2MgO 
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
162.

Which are the products in the following reaction? 2Mg + O2 ---> 2MgO 

a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
163.

Is the equation balanced?

a)

yes

b)

no

164.

Does the model show that mass has been conserved?

a)

yes

b)

no

c)

not enough information to tell

165.

Does the equation support the law of conservation of mass?

a)

no

b)

yes

c)

sometimes

d)

almost

166.

Does this modeled equation support the law of conservation of mass?

a)

yes

b)

no

c)

maybe

d)

almost

167.

Each beaker weighs 5g. One of the beakers has 20g of water and the other beaker has 20g of vinegar. You pour the contents of one beaker into another and then place it on the scale. Using the picture as a guide, how much would the new weight be?

a)

50g

b)

40g

c)

20g

d)

45g

168.

Based on the chemical reaction shown, how much carbon (C) should have reacted with lead monoxide (PbO)?

a)

50g

b)

77.4g

c)

41g

d)

22.6g

169.

Some amount of magnesium reacts with 16g of oxygen to produce 40.3g of magnesium oxide. How much magnesium was used?

a)

40.3g

b)

16g

c)

24.3g

d)

56.3g

170.

When you place a carrot on a plate and place it on the scale it weighs, 35g. You then chop the carrot into smaller pieces and weigh it on the same plate again. How much does it weigh now?

a)

30g

b)

45g

c)

5g

d)

35g

171.

You weigh a can of soda at 60g. Then you open the soda and weigh it again. This time it weighs 55g. Why?

a)

open system allowed gas to be released

b)

closed system allowed the gas to be released

c)

law of conservation of mass doesn't apply to soda

d)

law of conservation of mass says that this is impossible

172.

Which of the following equation matches the model shown?

a)

2Cl2 + Na2 --> 2NaCl2

b)

2H2 + 2O --> 2H2O2

c)

F2 + 2Li --> 2F2Li

d)

4Al + 2K --> 2Al2K

173.

Which of the following is the best reason why a liquid substance might lose mass?

a)

it turns into a gas and escapes

b)

some of the substance was destroyed

c)

it can never lose mass, it can only gain mass

d)

it is cooled to freezing temperatures

174.

Does this support the law of conservation of mass?

a)

yes, its balanced

b)

no, its unbalanced

c)

there's not enough information

d)

no, it starts with aq and turns into l and g

175.

What does "aq" represent?

a)

aqueous substance

b)

liquid substance

c)

gas substance

d)

solid substance

176.

What does "l" represent?

a)

aqueous substance

b)

liquid substance

c)

gas substance

d)

solid substance

177.

What does "g" represent?

a)

aqueous substance

b)

liquid substance

c)

gas substance

d)

solid substance

178.

What does "s" represent?

a)

aqueous substance

b)

liquid substance

c)

gas substance

d)

solid substance

179.

5g of sulfur (S) reacts with 5g of oxygen gas (O2). When the sulfite (SO3) produced is weighed, it comes out to 7g. How much sulfur and oxygen gas failed to react?

a)

10g

b)

2g

c)

3g

d)

17g

180.

How many molecules of water (H2O) are produced?

a)

4

b)

2

c)

3

d)

1

181.

How much water (H2O) is produced?

a)

19g

b)

39g

c)

59g

d)

25g

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