Forests gave way to grasslands and prairies following a general decrease in precipitation 25
million years ago. Indicate whether the statement is true or false.
T
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Which of the following instruments is usually a liquid-in-glass thermometer?
A. minimum thermometer B. radiometer C. thermistor D. electrical resistance thermometer
Which photograph-Figure 48-9 or Figure 48-10-shows a deposit of glacial till?
In the near future, the benefits of biofuel production may be enjoyed while reducing the impact on the global production of grain. One such promising approach is to
A) bioengineer cattle and goats to produce ethanol in their milk. B) produce biofuels from grasses and timber wastes instead of from corn. C) use the large amounts of animal wastes to produce ethanol. D) find ways to convert oil and natural gas into ethanol.
An environmental condition that can cause a natural system to change dramatically is a(n) ____________________
Fill in the blank(s) with correct word