What is a scientific theory?
A. A possible explanation that has not yet been tested
B. A possible explanation that has been tested and found to be false
C. A widely accepted and logical explanation of natural phenomena that has survived rigorous testing
D. A prediction made about a scientific phenomenon
Answer: C
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The introduction of which organism is correlated with a major disruption to the food web of the Great Lakes?
A. diatoms B. Diporeia. C. whitefish D. zebra mussels
The sections of Earth's crust that float on top of the mantle are known as ________
A) stratosphere B) lithosphere C) ozone layer D) tectonic plates E) oceans
Since 1900, and especially since 1950, the incidence of infectious diseases and the death rates from such disease has been greatly reduced
Recalling discussions from previous chapters, what other significant events have occurred since about 1950? Do you think these events are correlated? If so, what process is driving it? What will be an ideal response
Approximately how many days will you view the noon Sun above your northern horizon?
Use the analemma. What will be an ideal response?