Unit Conversions, Notation, Rates, and Interpretations of Data Activity 1.6 Name
ID: 112436 • Letter: U
Question
Unit Conversions, Notation, Rates, and Interpretations of Data Activity 1.6 Name: Course/Section: Date: A Make the following unit conversions using the Mathematical Conversions chart on page xx. 1. 10 mi. 2. lft.= 3. 16 km 4. 25 m- 5. 25.4 mL 6, 1.3 L= km CIn " cr Write these numbers using scientific notation 1, 6,555,000,000 , 2. 0.000001234 C RATES 1. Our current best estimate is that the western Grand Canyon in Arizona began to be excavated by river erosion about 6 million years ago. The greatest depth of the Crand Canyon is about 1.6 km. (a) What is the mean (average) rate that the Grand Canyon has been eroded into the Colorado Plateau during the past 6 million years, expressed in millimeters per year? Show your work below. (b) If erosion of the Grand Canyon proceeded at that rate during the most recent century, how much deeper is it today than it was on the day you were born? Show your work. 2. During Earth's very early history, our planet was whacked by meteorites large and small, and eventually grew to its current size. Earth probably went through a period in which it was molten from near the surface to its center. Throughout its history, Earth has been hotter at its center than at its outer surface. (a) In caves just below Earth's ground surface in continental crust, the temperature tends to be a constant (That's why pcople use caves for wine storage.) The deepest mine on Earth is currently the Mponeg South Africa, which reaches just over 4 km below the surface. At the gold mine just southwest of Johannesburg, bottom of that mine, the rock temperature reaches 66'C (-151°F). Using the cave temperature to represent the surface temperature of the crust at -0 km depth, what is the rate at which temperature changes in Earth between °C/km 0 and 4 km--the near-surface geothermal gradieneExplanation / Answer
A.
1 .10 mi = 16.093 Km
1 mi = 1.6093 Km
2. 1 ft = 0.3048 meters
3. 16 Km = 16000 meters
1 Km = 1000 meters
4. 25 m = 2500 cm
1 m = 100 cm
5. 25.4 mL = 25.4 cm3
1 mL = 1 cm3
6 .1.3 L = 1300 cm3
1 L = 1000 cm3
B.
1. 6.555 * 109
The number of places digit dot moves is 'N' 10N
2. 1.234 * 10-9
Here the digit dot moved 9 places in reverse so its -9.
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