Where are inactive sand dunes most common in the United States?
A) Pacific Northwest
B) Southeast
C) High Plains region
D) the windy Midwest
Answer: C
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A toy is pulled by three kids. Jim pulls with a force of 30 N north, Jill pulls with a force of 30 N south, and Jay pulls with a force of 15 N east. The acceleration of the toy is
A. 15 m/s2. B. 10 m/s2. C. 33 m/s2. D. need more information
What is the “local relief” of this landscape (the difference in elevation between the highest and lowest locations)?
The question is based on this contour line map with elevations shown in feet.
• North is to the top of the map.
• Streams are shown with dashed lines.
• A graphic scale for measuring horizontal distances is shown below the map.
• Estimate elevations between contour lines to the nearest half-contour interval; assume that the top of a
hill is one-half-contour interval higher than the highest contour line shown.
What will be an ideal response?
Approximately 1.1 bya, Laurentia began splitting apart along the ____________________ ____________________. Fill in the blank(s) with the appropriate word(s)
A(n) ____ is an explanation that can be tested by additional observations or controlled experiments
A) question B) science C) hypothesis D) scientific method