You are hopping on boulders beside a quiet stream that runs through a V-shaped valley. How did the boulders get there? The boulders were likely
A. deposited along the stream bank by wind.
B. carried in the stream then deposited at the stream bank.
C. produced when chemical weathering broke up the rock along the sides of the valley.
D. none of the above
Answer: C
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Soil develops ____
A)faster on bedrock than it does on unconsolidated sediment B)faster on unconsolidated sediment than it does on bedrock C)often with no weathering involved D)at similar rates throughout the world E)a distinct purple color when it has a high iron content
When someone says that evolution is not important, "after all, it's just a theory," it is probable that they do not understand how scientists use the term "theory."
Answer the following statement true (T) or false (F)
Urban sprawl is a problem in the United States. Explain what urban sprawl is and identify the major factors that have contributed to it.
What will be an ideal response?
Pluto was discovered in 1930, becoming the 9th planet in the solar system. As telescopes improved, other Sun-orbiting objects were discovered. Some of those were even larger than Pluto. By 2005, it was becoming apparent that many more objects would soon be discovered and that the number of planets in the Solar System could swell to as many as 50. After much debate, scientists in the International Astronomical Union (IAU) concluded that Pluto and the other similar celestial bodies orbiting the Sun should be classified as "dwarf" planets. Since a "planet" must clear the space surrounding its orbit, our Solar system now has 8 planets.Why weren't the other Pluto-like objects discovered earlier?
A. Scientific explanations make predictions. B. Science is limited by technology. C. Scientific explanations are tentative. D. Scientific hypotheses are falsifiable.