Biology Semester 1 Review

Why should an experiment be repeated?

• to form a hypothesis
• to reduce the chance of error
• to change controls
• to identify the problem

A scientific conclusion is based on 

• variables and experiments
• observations and questions
• facts and observations
• tools and evidence

A valid scientific investigation must be able to be

• replicated
• graphed
• predicted
• observed

Which of these is a scientific hypothesis?

• Atoms are the smallest particles of matter that exist.
• Albert Einstein is the greatest physicist of the twentieth century.
• The universe is surrounded by a second universe, which cannot be seen.

Which of the following is a reason to express scientific findings mathematically?

• The findings become more difficult to prove by experiment.
• The findings become easier to verify by experiment.
• The findings become more confusing.
• The findings become less appealing to the public.

This is the outcome of the experiment. We get data and results from this.

• Independent Variable
• Dependent Variable
• Control
• Constant

How many independent variables should be tested at a time in a scientific investigation?

• none
• one
• two
• three

Tags

NGSS.MS-PS2-2

The variable that is changed on purpose is: 

• Control
• Dependent
• Independent
• Outcome

Tags

NGSS.MS-PS2-2

A law is better than a theory.

• True
• False

A theory ________ becomes a law. 

• sometimes
• always
• never