Question

7 multiple choice 1 point what might cause a theory to change over time? new laws passed by the government new but untestable ideas changes in public opinion the discovery of new evidence 8 multiple choice 1 point evolution is one example of a theory. from what you know about the scientific method, what can you conclude about this biological theory? its been tested many times. scientists dont need to test it anymore. no one is allowed to test whether its true or not. there is very little evidence to support it. 9 multiple choice 1 point which of the following is a testable hypothesis? humans will someday land on mars. roses are more beautiful than violets. a plant needs at least five hours of sunlight per day to grow. ice cream is delicious.

Explanation:

• Question 7: Scientific theories are based on evidence. New evidence can challenge and change a theory. Laws (government - related) and public opinion are not scientific bases for theory change. Untestable ideas cannot be part of scientific theory change.
• Question 8: A scientific theory like evolution has been tested many times. Scientists always test theories as new evidence may emerge. There is a lot of evidence for evolution.
• Question 9: A testable hypothesis must be able to be tested through an experiment. "A plant needs at least five hours of sunlight per day to grow" can be tested by exposing plants to different amounts of sunlight. "Humans will someday land on Mars" is about a future event (not easily testable now in a scientific experiment sense). "Roses are more beautiful than violets" and "Ice cream is delicious" are subjective statements.

Answer:

• Question 7: The discovery of new evidence.
• Question 8: It's been tested many times.
• Question 9: A plant needs at least five hours of sunlight per day to grow.