Grasses are considered ________.
A. medium-weight fuels that burn easier during their growing season
B. fire dampeners, especially during the late summer
C. lightweight fuels that are easy to burn when dry
D. heavyweight fuels that can burn if conditions are just right
Answer: C
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Which of these high-quality energy sources drives the majority of chemical cycling that takes place in natural ecosystems?
A. solar B. geothermal C. nuclear D. fossil fuels
Saltwater or marine life zones include
a. Oceans b. Estuaries c. coral reefs d. oceans and estuaries e. oceans, estuaries and coral reefs
earth's inner core is thought to consist of ________.
a - superheated water b - magma c - hydrogen/helium gas d - sulfur e - a rigid mass
What are the three steps for precipitation to become water in streams?
a. Sheetflow ? rills ? streamflow b. Rills ? sheetflow ? streamflow c. Rills ? streamflow ? sheetflow d. Sheetflow ? streamflow ? rills