PS1 Theory and Law Review

What is the best definition for the term "theory" as it is used in science?

• A guess or hunch about something in nature.

• A comprehensive set of ideas explaining something in nature.

• A hypothesis that uses laws and observations to make an assumption.

I propose that Bald Eagle eggs in northern Maine will have thinner shells than those in southern Alaska due to increased levels of pesticides in water.

• This is theory

• This is a law

• This is a hypothesis

Scientific theories can be tested and refined.

• True

• False

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.

Why are scientific theories an important part of research and understanding?

• They allow scientists to make predictions.

• They allow scientists to make assumptions.

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

• True

• False

Which statement correctly identifies the difference between laws and theories?

• Laws describe "how" phenomena occurs, while theories explain "why" phenomena occurs.

• Laws are fact, while theories are opinion.

• Laws explains "why" phenomena exists, while theories explain "how".

Why do scientists develop a hypothesis before conducting research?

• It gives them directions on how to interpret results.

• It helps to predict outcomes and define the boundaries of their research.

• It gives them an outcome to shape their work around.

Newton's Universal Law of Gravitation is an equation we can use to calculate the force of gravity between two objects.

• This is a theory.

• This is a law.

• This is a hypothesis.

If a rooster crows at 5 am, then the farmer will get up.

• This is a theory.

• This is a law.

• This is a hypothesis.