What cyclical factor helps explain the warm period between about 1975 and 2005?
The question is based on Figure 24-6, a chart showing average annual temperature from 1905 to 2015 in three U.S. cities: Nome, Alaska; Bozeman, Montana; and Tucson, Arizona.
What will be an ideal response?
The positive phase of the PDO.
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In a terrestrial food web, which of the following categories of organisms will have the highest total energy content and biomass?
A) Primary producers B) Carnivores C) Consumers D) Herbivores
The same side of the Moon is always visible from Earth
Indicate whether the statement is true or false
A gently sloping mountain landform built from effusive eruption is known as a
A) cinder cone. B) shield volcano. C) crater. D) caldera. E) pluton.
Tailings left over after uranium ore processing can themselves present a radiation hazard.
Answer the following statement true (T) or false (F)