AnswersEA Academy Online Learning and Digital Citizenship Elective SpringUnit Test

Unit Test — Cumulative exam Answers

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81
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Students are studying the changing concentration of carbon dioxide levels in different substances. They insert sensors into each substance and allow a device to graph the results.What are the students most likely using?

A
thermometers
B
microscopes
C
probeware
D
silverware
82
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When Ellen reminds herself that everyone makes mistakes, she most likely understands that

A
people fail most of the time.
B
people usually fail at facing challenges.
C
mistakes are opportunities for growth.
D
mistakes are opportunities for excuses.
83

The following balanced equation shows the formation of ammonia.N2 + 3H2 2NH3How many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?

Question illustration
A
1.02 mol
B
2.11 mol
C
12.68 mol
D
19.02 mol
84

Which best states how some groups were excluded from the Enlightenment ideal of equality?

A
White male landowners could not participate in the government.
B
Non-Westerners were seen as foreign and less important.
C
Some people were required to have a social contract with the government.
D
Kings and queens were seen as having a divine right to rule.
85

Giovanni created this chart to study for an exam.Which best describes how to correct the error in the chart?

Question illustration
A
Remove “plastics” from the uses for sodium hydroxide.
B
Swap the uses for iron oxide and calcium carbonate.
C
Change the use for calcium chloride to “used in preservatives.”
D
Add “de-ice roads” to uses for calcium carbonate.
86

Which are challenges for study groups? Check all that apply.lack of focus during meetingstoo many new perspectivesproblems with communication lack of commitment to dutiesoverly motivated participants

A
lack of focus during meetings
B
too many new perspectives
C
problems with communication
D
lack of commitment to duties
E
overly motivated participants
87

When previewing a test, it is most important to

A
rush through the test.
B
take a long time.
C
read the directions carefully.
D
double check your work.
88

The balanced equation below shows the products that are formed when pentane (C5H12) is combusted. C5H12 + 8O2 5CO2 + 6H2OWhat is the mole ratio of oxygen to pentane?

Question illustration
A
1:6
B
6:8
C
8:1
D
5:8
89

Which idea did the Federalists support?

A
Federalists wanted to include a bill of rights in the US Constitution.
B
Federalists wanted strong local governments focused on the common good.
C
Federalists wanted to increase the number of small farming communities.
D
Federalists wanted a strong central government that governed everyone.
90

Which important change in electronic devices, such as televisions and computers, is a result of the use of metalloids as semiconductors?

A
Electronic devices have become smaller.
B
Electronic devices are now more brittle.
C
Electronic devices now use more energy.
D
Electronic devices have become more expensive.
91

recallwritecreatedesign

A
recall
B
write
C
create
D
design
92

The Statue of Liberty is made out of copper and was once shiny and copper-colored. Over the years, the copper has gone through a process called oxidation, where it has changed into a new material.

A
an endothermic reaction
B
an energy formation
C
a chemical reaction
D
a precipitate formation
93

Zahi introduces himself in an online message board. "Hi! I’m Zahi, and I’m a boy in the eighth grade. I’ve lived in Atlanta my whole life, and my parents moved here from Somalia. I wanted to join this group to talk to other kids who play sports using wheelchairs.”

A
intersectionality
B
media literacy
C
discrimination
D
economic class
94

What is conserved in physical changes?

A
shape
B
energy
C
mass
D
density
95

Zamir’s study group has been given sample test questions to prepare for a exam. To start off a session, he asks other members, "Did you review the test questions?”

A
How do the test questions look to you?
B
Do you have your notes on the questions?
C
Do you know the answers to the questions?
D
Are the test questions easy or difficult?
96

An example of a scheduling aid is a(n)

A
friend to remind you.
B
parent as an overseer.
C
electronic calculator.
D
electronic planner.
97

Which type of reaction has the general formula of AB + CD → AD + CB?

A
synthesis
B
decomposition
C
oxidation
D
replacement
98

What is one example of the separation of powers?

A
Political issues can be decided through popular vote.
B
People and groups are required to obey the law at all times.
C
The federal government is made up of three branches.
D
Some laws are national and apply to all of the states.
99

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.

Question illustration
A
A few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil.
B
Experiments with water vapor showed that elements combine in specific proportions.
C
Equations were used to identify regions around the nucleus where electrons would likely be.
D
Cathode rays were bent in the same way whenever a magnet was brought near them.
100

William and Katherine both earned a B on the same science test, but William actually ranked ahead of Katherine on the test.

A
letter-grading system based on a range of numbers.
B
number-grading system based on a range of letters.
C
number-grading system based on a range of percentages.
D
letter-grading system based on a range of percentages.

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