All the biotic and abiotic components in a specific region of Earth are called.
a. a population
b. an ecosystem
c. a niche
d. a kingdom
Ans: b. an ecosystem
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Which one of the following is an igneous rock?
A) limestone B) rhyolite C) slate D) quartz
Although temperatures have fluctuated throughout Earth's history, scientists are greatly concerned about the current warming because ____.
A. it is occurring at a more rapid rate than was typical in the past B. the sun is getting warmer which amplifies warming on the earth C. clouds are not reflecting as much radiation now as in the past D. the ozone hole is allowing more radiation to enter the atmosphere E. wildfires are more severe and occur with greater frequency
Explain how thunderstorms can occur at cold fronts
Which of the following is NOT a type of physical weathering process?
A) Frost wedging B) Exfoliation C) Hydrolysis D) Salt crystal growth