Question

question 8
1 pts
a proposed explanation that is based on observations and that can be tested is known as a(n)
○ principle.
○ law.
○ hypothesis.
○ experiment.

question 9
1 pts
a theory is accepted as the explanation of an observed phenomenon until
○ one study contradicts the theory.
○ repeated observations conflict with the theory.
○ a leading scientist feels that it is invalid.
○ a new method is used to gather data

Explanation:

Question 8

• A principle is a general rule or concept, not a testable explanation.
• A law describes a natural phenomenon (e.g., Newton's laws), not a proposed explanation to test.
• A hypothesis is a proposed explanation based on observations that can be tested (e.g., "If I water plants more, they will grow taller").
• An experiment is the process of testing, not the explanation.

• One study contradicting a theory is not enough (studies can have errors).
• A theory is revised or rejected when repeated observations (consistent, multiple sources) conflict with it, as science relies on empirical evidence.
• A scientist’s opinion (even a leading one) doesn’t invalidate a theory—science is evidence - based.
• A new data - gathering method alone doesn’t invalidate a theory; the data from it must contradict the theory.

Answer:

C. hypothesis

Question 9