Why do scientists consider any hypothesis valuable?
A) A hypothesis requires no further investigation if it is proved by the experiment.
B) A hypothesis can be used to explain a conclusion even if it is disapproved by the experiment.
C) A hypothesis requires no further investigation.
D) A hypothesis may lead to further investigation even if it is disapproved by the experiment.
Answer: D) A hypothesis may lead to further investigation even if it is disapproved by the experiment.
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A food desert
A) is a region which specializes in cuisine from arid regions of the world B) is a measure of poverty where people have limited access to fresh, healthy and affordable food C) is defined as an area where >50% of the residents live in poverty and >25% are suffering from a nutrition-related illness D) is a region where there is an overabundance of produce E) is usually found in affluent neighborhoods
Which area(s) on this world map is likely to have volcanoes above sea level?
A) A
B) B
C) C
D) D
If a column of air is heated, it will:
A) have a lower pressure at its base. B) become more dense. C) have a smaller vertical pressure gradient. D) contract.
What are two "hidden" contributions to economic development in Africa?
A) female entrepreneurs, civil service B) remittances, street vendors C) telecommunications, urban agriculture D) remittances, telecommunications E) civil service, untaxed housekeepers