7th QA # 1 Practice

Scientific theories are based on

• general assumptions of how systems work.
• mathematical principles that can be proven true.
• large amounts of data collected over time.
• observations from within only one scientific discipline.

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NGSS.HS-PS2-1

Scientific theories do not change once they have been written down.

• True
• False

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NGSS.HS-ESS1-2

Scientists create both scientific theories and scientific laws as they make observations and conduct experiments about the natural world. Which of the following statements most accurately compares the difference between scientific theories and scientific laws

• science laws are based on evidence while science theories are not

• science theories involve only biology, while laws involve all types of science

• science theories involve mathematical equations, while science laws are based on observations

• scientific theories explain natural events, while scientific laws describe what happens under certain conditions.

Before a scientific theory is accepted and supported, it has

• been tested by only one scientist.

• been published in scientific journals.

• been tested many times by different scientists.

• been approved by the International Committee of Scientists.

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NGSS.HS-PS1-2

What would be the best example of empirical evidence in Florida?

• An expert’s personal opinion about a nonnative species

• Estimates of 100,000 exotic pets inhabiting the Everglades

• The amount of money allocated to restore the Everglades

• Records of rainfall during Florida hurricanes over the past 75 years

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NGSS.MS-LS2-4

Which statement is correct about scientific laws in comparison to scientific theories?

• Scientific laws are rarely changed, while theories are more frequently modified as new evidence is found

• Scientific laws are often changed, while scientific theories are rarely modified or revised when new evidence is found

• Scientific laws are only about aspects in the biological sciences, while scientific theories are only about aspects in the physical sciences

• Scientific laws are only about aspects in the physical sciences, while scientific theories are only about aspects in the biological sciences

Which statement provides a reason why a scientific theory could change?

• Scientists repeat the experiments associated with the theory.

• Scientists find new evidence that does not fit the theory.

• The theory is published in a scientific journal.

• The theory is over one hundred years old.

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NGSS.HS-PS1-2

NGSS.HS-PS2-1

Empirical evidence is

• A well supported explanation of nature.

• Conducting an experiment.

• All the measurements and data Scientists gather in support of a scientific explanation.

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NGSS.HS-PS1-2

NGSS.HS-PS2-5

Why do scientists repeat their investigations?

• to avoid making observations.

• to throw out the information collected earlier.

• to develop a new procedure that they can use later.

• to make sure that the information they collect is reliable.

Which of these answers best describes a scientific theory?

• an explanation based on the opinion of a scientist

• a well-supported and widely accepted explanation of nature

• a description of a specific relationship under given conditions

• a statement describing what always happens under certain conditions

Tags

NGSS.MS-LS4-2