In the United States the air quality is poorer and drinking water more polluted today than in the 1970s.
Answer the following statement true (T) or false (F)
False
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This Gigapan image shows a dark metamorphic rock in contact with a lighter igneous rock (granite). Review the statements below, and determine which are correct about the dark metamorphic rock on the left in the Gigapan image.
A.) The metamorphic rock has undergone high-grade metamorphism. B.) The metamorphic rock shows foliation. C.) The metamorphic rock shows no foliation. D.) The metamorphic rock has undergone low-grade metamorphism.
The mammal-like reptiles at the end of the Paleozoic were
a. thecodonts. d. hesperornis. b. therapsids. e. none of the above c. protoavis.
The Pleistocene began with major glacial advances as early as:
a. 10 thousand years ago b. 100 million years ago c. 26 million years ago d. 2.6 million years ago
A brown mineral specimen and a green mineral specimen have identical hardness; therefore, they are the same mineral, but just happen to be different color
Indicate whether the statement is true or false