WorksheetsLS 7 - Chapter SE Review
Total questions: 25
Worksheet time: 13mins
Which group is part of a controlled experiment where the independent variable does NOT change?
constant group
variable group
control group
experimental group
1.4 has 2 significant digits as a result of which rule?
Final zeros after the decimal point are significant.
Zeros between nonzero digits are significant.
All nonzero numbers are significant.
Zeros used soley for spacing the decimal point are not significant.
Which of the following discribes the difference between a scientific theory and a scientific law?
A scientific law has already been tested, and a scientific theory is a hypothesis that needs to be tested.
A scientific law describes a pattern or event in nature that is always true. A scientific theory is an explanation of observations and investigations.
A scientific law is a hypothesis that needs to be tested, and a scientific theory has already been tested.
A scientific law is an explanation of observations and investigations. A scientific theory describes a pattern or event in nature that is always true.
Light rods are one method to bring light to microalgae. Which is an alternate method of bringing light to microalgae?
scrubbers
thermometers
paddlewheels
none of the above
If a student knows all of the prices of cereal samples in a taste test, how could that affect the results of the experiment?
Knowing the proces may create bias because the student might think the most expensive one tastes best.
Knowing the process may create bias because the student might think they'd rather spend less.
Knowing the process may cause the student to refuse testing the cheaper cereal.
Knowing the process may cause the student to refuse testing the most expensive cereal.
Which of the following lists three examples of how technology has made entertainment more accessible to people over the last one hundred years?
lasers cut TV tubes, DVD movies on computer monitors, wifi access on all devices
lasers cut TV tubes, DVD movies on computer monitors, videotaped movies
movies on TV, movies on computer monitors, videotaped movies
movies on TV, wifi access on all devices, videotaped moivies.
Which of the following is the only SI base unit with a prefix?
meter
kilogram
second
Kelvin
The prefix mega- means...
million
hundred
twenty
thousand
Which is needed to make microalgae-based biodiesel an affordable fuel alternative?
available land near coal-burning power plants
more commercial biofuel companies
more government funding
all of the above
One example of technology that is commonly used by scientists is...
observations
computers
variables
hypotheses
An explanation of observations of events based on knowledge gained from many observations and investigations is which of the following?
scientific experiment
scientific theory
scientific law
scientific truth
4.832 has 4 significant digits as a result of which rule?
zeros between nonzero digits are significant
zeros used soley for spacing the decimal point are not significant
all nonzero numbers are significant
final zeros after the decimal point are significant
The _____________ removes CO2 from smokestack gases.
washer
sprayer
vent
scrubber
Converting from one SI Unit to another involves writing the correct mathematical _______________.
solution
proportion
multiplication problem
equation
5cm as shown on a ruler is which kind of digit?
known
variable
significant
estimated
0.03 as shown on a ruler is which kind of digit?
estimated
variable
significant
known
A sample should be a ______________ representation of the whole.
full
partial
specific
random
Which is NOT a result of scientific inquiry?
possible explanations for questions
adding more branches of science
new materials
technology
Algae are ___________.
fossils
plantlike protists
non-living
found only in oceans
Which of the following are two ways that scientists communicate their results with other people?
written reports and verbal presentations
written reports and textbooks
picture books and verbal presentations
textbooks and verbal presentations
Which of the following is a way that scientists communicate their results to others?
exchange information on the Internet
write scientific articles
speak at a conference
all of the above
When using living animals in scientific research which of the following is especially important?
precision
constants
bias
ethics
Which involves studting a small amount of something in order to learn about the larger whole?
skepticism
bias
sampling
none of these
Which of the following sescribes a target where the arrows illustrate both accuracy and precision?
3 arrows at in the center of the target
2 arrows on the outer ring and 1 arrow in a middle ring
3 arrows on the outer ring
1 arrow in the center of the target and 2 on the outer ring
Which of the following is a location where microalgae can be found?
the desert
the forest
the moon
a pond
