Hypotheses, Theories, and Laws Answers

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A student conducted a comparative investigation to test the hypothesis that different areas of New York City have different levels of air pollution.Which is a likely benefit of this comparative investigation?

A
It provides her with a large amount of information about air pollution in New York City.
B
It provides her with results that are valid for a long time.
C
It requires that she observe a limited number of variables.
D
It allows her to learn about the causes and effects of air pollution in major cities.
2
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A student conducted a scientific investigation on the magnetic properties of iron. She used a magnet to try to pick up iron nails.After making several observations, which question can she answer?

A
Which part of a magnet is strongest at attracting iron?
B
How fast does iron lose its magnetism?
C
What is the importance of studying the magnetic field of a magnet?
D
How does the color of iron change with exposure to air?
3

A student is participating in the school science fair. She wants to investigate household cleaners.Which question can she best answer through scientific investigation?

A
Which household cleaner is most effective at removing stains?
B
Which household cleaner smells the best?
C
How often should a person use household cleaners?
D
Where should a person buy household cleaners?
5

Which phrase best describes scientific inquiry?

A
based on opinions
B
includes only a few possible paths
C
involves asking and answering questions
D
used only by scientists
7

A student wanted to know the most effective way to grow bacteria in a lab. He conducted a descriptive investigation instead of an experimental investigation.What is a limitation of his investigation?

A
A descriptive investigation cannot show a cause-and-effect relationship between bacteria growth and possible factors affecting growth.
B
A descriptive investigation is always more expensive than an experimental investigation.
C
A descriptive investigation usually does not involve much data collection to support a hypothesis.
D
A descriptive investigation provides little prior knowledge or background information about bacteria growth.
8

Jeff finds a pond during a nature walk, and he has some questions based on his observations of the pond.Which question can he answer through a scientific investigation?

A
Which organisms are part of the food web in the pond?
B
How much money should be spent to make the pond more attractive?
C
Which pond animals would make the best pets?
D
Which plants in the pond are the prettiest in summer?
9

What phrase describes a good scientific question?

A
has a wide focus
B
addresses a gap in knowledge
C
does not lead to a testable hypothesis
D
has a simple yes or no answer
10

What is the first step in the process of scientific inquiry?

A
providing explanations
B
asking a question
C
making an observation
D
performing investigations

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