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8th Grade Exam Review Part 1
Test Description: This is review for first semester exam covering science basics.
Instructions: Answer all questions to get your test result.
1) When smelling an odor from a chemical during an investigation, you should
A
waft.
B
blow your nose first.
C
take a big wiff.
D
dab some on your wrist before smelling it.
2) Observations that deal with a number or amount are called
A
quantitative observations.
B
qualitative observations.
C
manipulated observations.
D
operational observations.
3) During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the
A
operational variable.
B
dependent variable.
C
manipulated variable.
D
responding variable.
4) One useful tool that may help a scientist interpret data by revealing unexpected patterns is a
A
graph
B
theory
C
variable
D
law
5) What is a way of writing very large or small numbers that uses exponents?
A
data tables
B
scientific notation
C
graphs
D
significant figures
6) The closeness of a measurement to its true value is its
A
estimate.
B
significant figures.
C
accuracy.
D
precision.
7) The significant figures in a measurement include
A
the digits that have been measured exactly, plus one digit whose value has been estimated.
B
only the last digit in a measurement.
C
only the digits that have been measured exactly.
D
only the digit whose value has been estimated.
8) How do scientist investigate a problem in the real world?
A
They watch reality tv.
B
They use lab rats.
C
They conduct field studies.
D
They conduct online surveys.
9) The best graph to use to show percents as a whole is a
A
bar graph
B
column graph
C
line graph
D
circle graph
10) When scientists create a representation of a complex process, they are
A
inferring.
B
making models.
C
predicting.
D
classifying.
*select an answer for all questions
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