Explain why most materials become less dense as their temperature is increased?
What will be an ideal response?
Answer: In fluids, expansion sets the stage for convection. Warm, less dense fluid is pushed upward by the cooler, more dense fluid around it. When molecules gain energy, they move more rapidly and push more vigorously against their surroundings. The result is an expansion as the region of heated molecules push outwards and increases the volume. Since the same amount of matter now occupies a larger volume, overall density has been decreased.
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Formations consist of rocks that are all the same age
a. True b. False
Using Map T-1, the “Hawaii, Hawaii,” topographic map (scale 1:250,000; contour interval 200 feet), calculate the gradient of Mauna Loa (19°28'17"N, 155°35'41"W) along line AB, from the 5000', contour (near Point A) toward the summit. On the edge of a piece of paper measure out a distance of 10 miles using the graphic map scale, and then determine the elevation change over that distance.
In this problem, you will compute the gradients of Mauna Loa in Hawai‘i, Mount Vsevidof in Alaska, and SP Mountain in Arizona. (You may also determine the elevation changes and distances needed to calculate these gradients by using Google Earth™.) The recommended starting point and distance to measure are given for all three volcanoes.
Erosion and deposition
A. are usually human-caused processes. B. affect the movement of Earth's tectonic plates. C. occur on land but not in the ocean basin. D. create landforms such as caves, waterfalls, and valleys.
Which of the following requires more work: to change the speed of a car from 0 to 40 mph (0 to 64 km/h) or from 40 to 65 mph (64 to 105 km/h)?
What will be an ideal response?