North Carolina Science Grade 7

Chapter 1: The Nature of Science and Technology

The Nature of Science

1.
Improvements in communication technology have led to __________ of scientific information.
A)internalization
B)localization
C)rationalization
D)globalization
2.
In an experiment, __________ is the part of the investigation that is changed.
A)the first trial
B)the independent variable
C)the conclusion
D)the control
3.
Which of these is true?
A)Only one trial of an experiment is ever necessary.
B)Conducting more trials of an experiment provides more reliable results.
C)It is best to change methods between trials in an experiment.
D)Unusual outcomes never occur in an experiment.
4.
Which SI measurement unit would you use to weigh a large dog?
A)a liter
B)a kilogram
C)a millimeter
D)a centimeter
5.
Which of these are the variables that stay the same throughout the experiment?
A)the data
B)the constant
C)the independent variable
D)the trials
6.
You want to test building materials for their durability in cold weather. You make a small house and conduct different tests on it. What is this an example of?
A)a model
B)a data table
C)a bacterium
D)an independent variable
7.
Which of these is true?
A)Sometimes experimental data do not support the hypothesis.
B)Your experiment is a failure if the data do not support your hypothesis.
C)Most hypotheses are wrong.
D)A successful experiment happens only when it gives the results you predicted.
8.
Which of these is true?
A)Only women make scientific discoveries.
B)Advances in scientific knowledge have been made by people pursuing hobbies.
C)Europeans have not contributed to scientific discoveries.
D)Advances in medicine haven't happened since the 1700s.
9.
Which of these is a concern for scientists using the Internet?
A)language
B)accuracy
C)speed
D)availability
10.
Which SI measurement unit would you use to measure the amount of water in an aquarium tank?
A)a liter
B)a kilogram
C)a millimeter
D)a kilometer
11.
In order to discover the source of cholera in 1854, Dr. John Snow used __________ to solve the problem.
A)a model
B)a telephone
C)unproven theories
D)computers
12.
__________ is a statement that can be tested.
A)A bias
B)A model
C)A control
D)A hypothesis
13.
Which SI measurement unit would you use to measure the height of a small plant's stem?
A)a centimeter
B)a liter
C)a kilometer
D)a tonne
14.
Which one of these is a symptom of cholera?
A)below-normal body temperature
B)blurred vision
C)runny nose
D)dehydration
15.
Which of these people was responsible for creating a plant and animal classification system?
A)Einstein
B)Darwin
C)Aristotle
D)Galileo
16.
Numbers can be used to __________.
A)list materials
B)make an experiment safer
C)reduce bias in experiments
D)describe observations
17.
__________ help organize the observations and results of your experiment.
A)Independent variables
B)Goggles
C)Data tables
D)Beakers
18.
Which one of these is a disease that happens when a person eats contaminated food?
A)chicken pox
B)leukemia
C)E. coli
D)polio
19.
To make sure experimental results are valid, which of these procedures must be followed?
A)change the experimental process
B)pick two hypotheses
C)include bias
D)conduct multiple trials
20.
__________ is a sample from an experiment that does not have the independent variable applied to it.
A)A bias
B)A control
C)A trial
D)A hypothesis
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