Biology Hypothesis, Theory, Law Week 3

To be a possible answer to a scientific question, a hypothesis must be

• Testable

• Unique

• Written

• Controlled

How does a law differ from a theory?

• A law is a theory that has been proven to be true and universal.

• A theory is a group of hypotheses that prove a law is true.

• A law is a statement of fact, but a theory is an explanation.

• a. A theory is a proposed law that has not yet been peer reviewed.

What do hypotheses, theories, and laws have in common?

• Data

• Predictions

• Explanations

• Observations

The statement “force equals mass times acceleration (F=ma)” is Newton’s second law of motion. Why is this a law rather than a theory?

• It states, rather than explains, the relationship between the variables

• It cannot be proven, whereas a theory can be proven

• It may be revised if new information shows that the relationship has changed.

• It was classified as a law because it is related to other similar discoveries

Gregor Mendel demonstrated that traits are passed from parents to offspring independently of one another under all circumstances that he tested. All other genetics researchers have observed this as well. Based on this information, the statement can be made that “traits are passed from parents to offspring independently of one another.” Which describes the statement of fact?

• a law

• a Hypothesis

• a theory

• a observation

How should you test a hypothesis?

• by writing a mathematical equation

• by making a single observation

• by performing a controlled experiment

• by answering a series of questions

Which occurs directly before forming a hypothesis?

• proposing a law

• drawing a conclusion

• developing a testable question

• analyzing experimental data

A testable hypothesis could be formed from which question?

• Are bass more active in the daytime than at night?

• When whales jump out of water, are they happy?

• Are red tulips prettier than tulips of other colors?

• Why are gerbils more popular as pets than hamsters are?

Conlan wants to answer the question, “Does phosphorus affect tomato fruit production?” Which statement represents a hypothesis that he can test to answer his question?

• If phosphorus affects tomato fruit production, then tomatoes that are fertilized with phosphorus will have longer leaves

• If phosphorus affects tomato fruit production, then phosphorus should be added to the soil during planting.

• If phosphorus affects tomato fruit production, then adding phosphorus to the soil will make tomatoes taste better.

• If phosphorus affects tomato fruit production, then plants that are fertilized with phosphorus will produce more tomatoes.

Which is the correct order in the scientific process?

• ask a question, form a hypothesis, make an observation

• ask a question , make an observation ,form a hypothesis

• make an observation , form a hypothesis , ask a question

• make an observation , ask a question, form a hypothesis