Oceanic plates are ____.?
a. ?poor in basalt, but rich in silicates
b. ?an even mix of basalts and silicates
c. ?rich in basalt and silicates
d. ?rich in basalt, but poor in silicates
e. ?poor in basalts and silicates
ANSWER: d
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The sand dunes shown in this photograph
A) are isolated and have well-defined crescent shapes.
B) formed in a wet climate based on their shape.
C) are part of a complex dune field.
D) are loess deposits.
E) are inactive because they have been eroded by running water.
The Milankovitch cycles in association with other natural factors explain how glaciers may
advance and retreat over periods of hundreds of millions of years. a. true b. false
Humid subtropical climates experience convectional showers in the summer and frontal showers in the fall, winter and spring, creating year-round precipitation
Indicate whether the statement is true or false
When a chemical change occurs, the event is usually accompanied by _____.
a. The release of energy b. Spattering or boiling c. A physical change d. The evolution of gas