sCIENCE Q&A
Why have improvements in microscopes over time resulted in revisions in the cell
theory? - (correct answer)They have revealed new information about cell structure and
processes.
A testable hypothesis could be formed from which question? - (correct answer)Are bass
more active in the daytime than at night?
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? -
(correct answer)If phosphorus affects tomato fruit production, then plants that are
fertilized with phosphorus will produce more tomatoes.
To be a possible answer to a scientific question, a hypothesis must be - (correct
answer)testable.
What is the purpose of controlling the environment when testing a hypothesis? - (correct
answer)It allows the scientist to determine the effect of the changed variable.
What do hypotheses, theories, and laws have in common? - (correct
answer)observations
In the early days of germ theory, contagious diseases were thought to be caused by
fungi or bacteria. In the 1890s, Dmitri Ivanovski filtered extracts from diseased tobacco
plants and discovered that the disease could be transmitted to new plants through the
filtrate. He concluded that the disease was caused by particles smaller than bacteria:
the tobacco mosaic virus.
Which best explains how Ivanovski's work led to a change in the germ theory? - (correct
answer)WRONG - He used a more powerful bacterial strain than other scientists had.
Why have improvements in microscopes over time resulted in revisions in the cell
theory? - (correct answer)They have revealed new information about cell structure and
processes.
A testable hypothesis could be formed from which question? - (correct answer)Are bass
more active in the daytime than at night?
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? -
(correct answer)If phosphorus affects tomato fruit production, then plants that are
fertilized with phosphorus will produce more tomatoes.
To be a possible answer to a scientific question, a hypothesis must be - (correct
answer)testable.
What is the purpose of controlling the environment when testing a hypothesis? - (correct
answer)It allows the scientist to determine the effect of the changed variable.
What do hypotheses, theories, and laws have in common? - (correct
answer)observations
In the early days of germ theory, contagious diseases were thought to be caused by
fungi or bacteria. In the 1890s, Dmitri Ivanovski filtered extracts from diseased tobacco
plants and discovered that the disease could be transmitted to new plants through the
filtrate. He concluded that the disease was caused by particles smaller than bacteria:
the tobacco mosaic virus.
Which best explains how Ivanovski's work led to a change in the germ theory? - (correct
answer)WRONG - He used a more powerful bacterial strain than other scientists had.
