Which experimental procedure would provide the best evidence for the effect of light on plant growth?(1 point)
Responses
Plant seeds in different soils and expose them to different amounts of light, then measure plant growth.
Plant seeds in different soils and expose them to different amounts of light, then measure plant growth.
Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
Measure plants receiving different amounts of light in their natural environments.
Measure plants receiving different amounts of light in their natural environments.
Measure plants of the same variety grown in environments that receive different amounts of light.
Measure plants of the same variety grown in environments that receive different amounts of light.
The experimental procedure that would provide the best evidence for the effect of light on plant growth is:
Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
A family raises a species of fish in a pond. At the end of each summer, the family sells the fully grown fish. One year, the family notices that the fish are smaller than they had been the previous year. Which statement best explains this observation?(1 point)
Responses
There were fewer fish this year than there were last year.
There were fewer fish this year than there were last year.
The type of fish in the pond this year tended to be smaller than the type of fish last year.
The type of fish in the pond this year tended to be smaller than the type of fish last year.
There was less food available in the pond this year than last year.
There was less food available in the pond this year than last year.
There was more space in the pond this year than last year.
The statement that best explains the observation that the fish are smaller than the previous year is:
There was less food available in the pond this year than last year.
A species of plant grows poorly in the shadow of a building. Which environmental need is the plant most likely lacking? (1 point)
Responses
space
space
nutrients
nutrients
sunlight
sunlight
water
water
The plant is most likely lacking sunlight.
What was the purpose of the Freedmen’s Bureau?
(1 point)
Responses
to free the slaves
to free the slaves
to feed, clothe, and educate former slaves
to feed, clothe, and educate former slaves
to move former slaves to the Northern states
to move former slaves to the Northern states
to ensure that former slaves had the right to vote
to ensure that former slaves had the right to vote