_____ is a testable statement that proposes an explanation for a set of observations. It leads to predictions that can be tested by an experiment.
Fill in the blank(s) with the appropriate word(s).
Answer: hypothesis
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What will be an ideal response?
A total fertility rate (TFR) of 2.1 will maintain a population at its current level. Australia's TFR is only 1.9, yet its population continues to grow, albeit at a modest 1.0%. How is this increase possible?
A. The increase is attributed to aborigine birth rates, which are not counted in the census. B. Annually more people emigrate than immigrate. C. Australia has a positive net migration rate. D. It is not possible, so the data must be wrong.
A delta with long, fingerlike sand bodies, each deposited in a distributary channel that progrades far seaward, such as the Mississippi River, is typically formed as a(n) ____-dominated delta
A)avian B)stream C)wave D)tide E)sediment
Explain how aerosols in the troposphere and stratosphere affect global temperature
What will be an ideal response?