AnswersHSOH-Geology IEvaluating Scientific Explanations

Evaluating Scientific Explanations — Unit test Answers

25 verified answers
1
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Which best describes the purpose of bar graphs?

A
They show changes over a period of time.
B
They compare quantities for particular categories.
C
They show the relationship among parts of a whole.
D
They compare ranges as continuous data.
2
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Why is newton's first law of motion considered a law and not a theory?

A
It is an unsupported idea.
B
It is based on multiple observations.
C
It has never been tested.
D
It was validated by a singular experiment.
3

Analyze the graph.

Question illustration
A
increasing parking meters
B
increasing traffic signals
C
increasing places to park bikes
D
decreasing bike-repair shops
4

Hunter is in lab. He clears a spot on his lab bench to start working. He also puts his lab coat and goggles on. He then identifies where all of the safety equipment is. He notices his station is next to the fume hood, which ventilates the chemicals stored there. The noise of the fume hood was bothersome, so Hunter turned it off.Which could be an error in his set-up?

A
He should not turn off the fume hood.
B
He should wait to put on his coat until after the directions are given.
C
He should wait to put on his goggles until after the directions are given.
D
He should not sit next to the fume hood.
5

Ingrid wrote the hypothesis below.If the temperature of a liquid increases, the density of the liquid decreases because the particles move farther apart.What are the variables in her hypothesis?

A
The independent variable is the temperature, and the dependent variable is the density.
B
The independent variable is the density, and the dependent variable is the temperature.
C
The independent variable is the temperature, and the dependent variable is the distance between particles.
D
The independent variable is the distance between particles, and the dependent variable is the temperature.
6

The table shows results of an experiment that was replicated.

Question illustration
A
They are neither precise nor reproducible.
B
They are precise but not reproducible.
C
They are accurate and reproducible.
D
They are accurate but not reproducible.
7

Material safety data sheets are used to give the information about a solvent. The excerpt below is part of an MSDS.

Question illustration
A
fire safety
B
disposal safety
C
chemical use safety
D
glassware safety
8

When an experiment is replicated, how should the results of the two experiments compare?

A
The results of the first experiment should be less accurate.
B
The results of the second experiment should be less accurate.
C
The results of the experiments should be similar.
D
The results of the experiments should be one hundred percent certain.
9

Which of these steps would most likely be part of a lab procedure?

A
Write a hypothesis to answer a question.
B
Write a title at the top of a completed lab report.
C
Record the time to complete a chemical reaction.
D
Create a question on the cause of a chemical reaction.
10

A scientist wants to use a model to help present the results of his detailed scientific investigation. Why would a model be useful?

A
because the model makes the concepts easier to understand
B
because the model is easy to put together and to use
C
because the model prevents other scientists from asking questions
D
because the model requires the audience to pay full attention to it
11

Scientists in a particular field strive for the same quality of work because they know their peers will be reviewing their scientific claims. What does this review process help ensure?

A
standards of the profession
B
publication in scientific journals
C
resistance to new information
D
access to university databases
12

Which serves as evidence for a scientific claim?

A
surveys of public opinion
B
company advertisements
C
controlled experiments
D
personal websites
13

Which is the SI base unit for mass?

A
meter
B
pound
C
gram
D
foot
14

Read the measurement.

Question illustration
A
34 mL
B
38 mL
C
39 mL
D
40 mL
15

Saul converts 2.392 hectoliters to liters. What should his new number be?

A
0.02392
B
0.2392
C
239.2
D
2392
16

A class is using marshmallows to demonstrate different chemicals’ properties by heating and cooling the marshmallows. Which student is practicing bad laboratory safety?

A
Neka is cleaning up the melted marshmallows after recording her observations.
B
Nikkos checks his glassware for imperfections before using them.
C
Kenneth is using the Bunsen burner to roast the marshmallows and eat them.
D
Kojo threw the used marshmallows into the trash can after his instructor told him to do so.
17

The results of a dart game were precise but not accurate. The accepted value of the game was the center of the dartboard.

A
All of the darts hit the center of the board.
B
Some of the darts hit the center of the board.
C
The darts hit the same general area of the board.
D
The darts hit very different areas of the board.
18

A scientist collected the following data, which show how the pressure of water vapor changes with temperature.Temperature (°C)Pressure (mm Hg)04.5109.62019.1 30 33.24058.75095.6What would a scientist do to best communicate these data to other scientists in a presentation?

A
Replace the table with text highlighting pressures.
B
Change the unit of pressure to atm.
C
Make a graph for better visual representation.
D
Display only rows 1, 3, and 6 of the data to simplify results.
19

Alisha organizes her data about the element lead into a table.Which did Alisha place in the wrong column?

Question illustration
A
Density: 11.34 g/cm3
B
Soft
C
Solid at room temperature
D
Malleable
20

Alpa wants to change 0.54 kilometers into a smaller metric unit. She will have to

A
multiply.
B
divide.
C
add.
D
subtract.

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