If a river had a 10-year flood this year, it could also have a 10-year flood next year
a. True
b. False
Indicate whether the statement is true or false
True
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Fossil fuels were formed from ________
A) pockets of hydrogen sulfide gas that were trapped beneath bogs and wetlands B) sodium and calcium incorporated into ancient fossils, seashells, and limestone C) plants and algae trapped underground millions of years ago D) nitrogen trapped in rocks during extensive volcanic activity
Humans interfere with the natural nitrogen cycle by logging activities.
Answer the following statement true (T) or false (F)
Flowing meltwater leaving a glacier deposits debris close to the glacier in a broad, gently sloping plain known as
A) terminal moraine B) an outwash plain C) alluvium D) esker E) tallons
USGS Topographic maps reveal details
A) of an area's physical landscape. B) of an area's cultural landscape. C) of an area's elevation variation. D) of both physical features and cultural landmarks of an area. E) of an area's water resources.