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Scientific Methods Answers

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Which is an example of making a qualitative observation?

A
measuring the speed of the chemical reaction
B
describing how copper changes color in chlorine
C
recording how long it takes to burn magnesium
D
showing the results of an experiment with a graph
2
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Several scientists from different countries are asked to examine the results of an experiment before a journal will print it. Which term best describes this step of the investigative process?

A
question
B
communication of results
C
peer review
D
experiment control
3

Read the lab procedure for a controlled experiment that looks at the effect of heat on the circumference of bicycle tires.Step 1: Pump up six identical bike tires to the recommended air pressure.Step 2: Place three tires under heat lamps, and keep the other three tires at room temperature.Step 3: After four hours, measure the circumference of each tire. Step 4: Record your results in the table.Step 5: (?)Which step should be next in this procedure?

A
List the materials that are needed.
B
Write a conclusion for the experiment.
C
Write a hypothesis for the results.
D
Draw a table for the observations.
4

Which best describes the act of using senses or tools to gather information?

A
creating a hypothesis
B
making an observation
C
summarizing the results
D
recording the measurements
5

Which best describes the purpose of a controlled experiment?

A
to make sure the results of the experiment support the hypothesis
B
to prevent a dangerous condition resulting from a reaction
C
to examine whether one variable causes a change in another
D
to prevent an undesired change in a variable
6

Which is an example of making a quantitative observation?

A
measuring the mass of metal used in a reaction
B
recording the color of a solid formed in a reaction
C
describing a liquid as having a slippery feel
D
rating an odor on how nice it smells
7

Which is one way that scientists communicate the results of an experiment?

A
asking a question
B
drawing a picture
C
writing a procedure
D
forming a hypothesis
8

What must be part of a quantitative observation?

A
a change of state
B
a change in size
C
a number
D
a color
9

An investigation involves determining which metal is better for making pots that will cook food faster. Which is the best hypothesis to use for this investigation?

A
Copper is better than iron for making pots.
B
Copper is more malleable and heats up faster than iron.
C
If copper is a better conductor, it will heat up faster than iron.
D
If copper heats up faster than iron, it is better for making pots.
10

During a conference presentation, a scientist described the materials that she used and how she performed her experiments. Which best explains why a scientist would share these details in a conference?

A
It tells the audience if the results support or contradict the hypothesis.
B
It tells the peers if the study is supported by mathematical models.
C
It informs the peers if the results are supported by other scientists.
D
It informs the audience if the study included controlled tests.

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