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1 Name Date 1. You have been hired by a company to write a report on Internet companies Wi-Fi ranges. They have requested that all values be reported in feet using scientific notation. Ivan s Internet Company boasts that its wireless access points have the greatest range. The company claims that you can access its signal up to 2,640 feet from its device. A competing company, Winnie s Wi- Fi, has devices that extend to up to miles. a. Rewrite the range of each company s wireless access devices in feet using scientific notation and state which company actually has the greater range (5,280 feet = 1 mile). b. You can determine how many times greater the range of one internet company is than the other by writing their ranges as a ratio. Write and find the value of the ratio that compares the range of Winnie s wireless access devices to the range of Ivan s wireless access devices. Write a complete sentence describing how many times greater Winnie s Wi-Fi range is than Ivan s Wi-Fi range. c. UC Berkeley uses Wi-Fi over Long Distances (WiLD) to create long-distance, point-to-point links. UC Berkeley claims that connections can be made up to 10 miles away from its device. Write and find the value of the ratio that compares the range of Ivan s wireless access devices to the range of Berkeley s WiLD devices. Write your answer in a complete sentence. Date: 10/17/14 141

2 2. There is still controversy about whether or not Pluto should be considered a planet. Though planets are mainly defined by their orbital path (the condition that prevented Pluto from remaining a planet), the issue of size is something to consider. The table below lists the planets, including Pluto, and their approximate diameters in meters. Planet Approximate Diameter (m) Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto a. Name the planets (including Pluto) in order from smallest to largest. b. Comparing only diameters, about how many times larger is Jupiter than Pluto? Date: 10/17/14 142

3 c. Again, comparing only diameters, find out about how many times larger Jupiter is compared to Mercury. d. Assume you were a voting member of the International Astronomical Union (IAU) and the classification of Pluto was based entirely on the length of the diameter. Would you vote to keep Pluto a planet or reclassify it? Why or why not? e. Just for fun, Scott wondered how big a planet would be if its diameter was the square of Pluto s diameter. If the diameter of Pluto in terms of meters were squared, what would be the diameter of the new planet (write answer in scientific notation)? Do you think it would meet any size requirement to remain a planet? Would it be larger or smaller than Jupiter? Date: 10/17/14 143

4 3. Your friend Pat bought a fish tank that has a volume of 175 liters. The brochure for Pat s tank lists a fun fact that it would take tanks of that size to fill all the oceans in the world. Pat thinks the both of you can quickly calculate the volume of all the oceans in the world using the fun fact and the size of her tank. a. Given that 1 liter = cubic kilometers, rewrite the size of the tank in cubic kilometers using scientific notation. b. Determine the volume of all the oceans in the world in cubic kilometers using the fun fact. c. You liked Pat s fish so much you bought a fish tank of your own that holds an additional 75 liters. Pat asked you to figure out a different fun fact for your fish tank. Pat wants to know how many tanks of this new size would be needed to fill the Atlantic Ocean. The Atlantic Ocean has a volume of 323,600,000 cubic kilometers. Date: 10/17/14 144

6 d 8.EE.A.3 8.EE.A.4 Student stated a position but provided no explanation to defend it. Student stated a position and provided weak arguments to defend it. Student stated a position and provided a reasonable explanation to defend it. Students stated a position and provided a compelling explanation to defend it. e 8.EE.A.3 8.EE.A.4 Student was unable to perform calculation or answer questions. Student performed calculation but did not write answer in scientific notation. Student provided an explanation for why the new planet would remain a planet by stating it would be the largest. Student correctly performed calculation. Student provided an explanation for why the new planet would remain a planet without reference to the calculation. Student correctly stated that the new planet would be the largest planet. Student correctly performed calculation. Student provided an explanation for why the new planet would remain a planet, including reference to the calculation performed. Student correctly stated that the new planet would be the largest planet. 3 a c 8.EE.A.3 8.EE.A.4 Student completed all parts of the problem incorrectly. Evidence that student has some understanding of scientific notation but cannot integrate use of properties of exponents to perform operations. Student made gross errors in computation. Student completed one part of (a) (c) correctly. Student made several minor errors in computation. Student performed operations on numbers written in scientific notation but did not rewrite answers in scientific notation. Student completed two parts of (a) (c) correctly. Student made a minor error in computation. Evidence that student understands scientific notation and can use properties of exponents with numbers in this form. Student completed all parts of (a) (c) correctly. Student had precise calculations. Evidence of mastery with respect to scientific notation usage and performing operations on numbers in this form using properties of exponents. Date: 10/17/14 146

7 Name Date 1. You have been hired by a company to write a report on Internet companies Wi-Fi ranges. They have requested that all values be reported in feet using scientific notation. Ivan s Internet Company boasts that its wireless access points have the greatest range. The company claims that you can access its signal up to 2,640 feet from its device. A competing company, Winnie s Wi- Fi, has devices that extend to up to miles. a. Rewrite the range of each company s wireless access devices in feet using scientific notation and state which company actually has the greater range (5,280 feet = 1 mile). b. You can determine how many times greater the range of one internet company is than the other by writing their ranges as a ratio. Write and find the value of the ratio that compares the range of Winnie s wireless access devices to the range of Ivan s wireless access devices. Write a complete sentence describing how many times greater Winnie s Wi-Fi range is than Ivan s Wi-Fi range. c. UC Berkeley uses Wi-Fi over Long Distances (WiLD) to create long-distance, point-to-point links. UC Berkeley claims that connections can be made up to 10 miles away from its device. Write and find the value of the ratio that compares the range of Ivan s wireless access devices to the range of Berkeley s WiLD devices. Write your answer in a complete sentence. Date: 10/17/14 147

8 2. There is still controversy about whether or not Pluto should be considered a planet. Though planets are mainly defined by their orbital path (the condition that prevented Pluto from remaining a planet), the issue of size is something to consider. The table below lists the planets, including Pluto, and their approximate diameters in meters. Planet Approximate Diameter (m) Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto a. Name the planets (including Pluto) in order from smallest to largest. b. Comparing only diameters, about how many times larger is Jupiter than Pluto? Date: 10/17/14 148

9 c. Again, comparing only diameters, find out about how many times larger Jupiter is compared to Mercury. d. Assume you were a voting member of the International Astronomical Union (IAU) and the classification of Pluto was based entirely on the length of the diameter. Would you vote to keep Pluto a planet or reclassify it? Why or why not? e. Just for fun, Scott wondered how big a planet would be if its diameter was the square of Pluto s diameter. If the diameter of Pluto in terms of meters were squared, what would be the diameter of the new planet (write answer in scientific notation)? Do you think it would meet any size requirement to remain a planet? Would it be larger or smaller than Jupiter? Date: 10/17/14 149

10 3. Your friend Pat bought a fish tank that has a volume of 175 liters. The brochure for Pat s tank lists a fun fact that it would take tanks of that size to fill all the oceans in the world. Pat thinks the both of you can quickly calculate the volume of all the oceans in the world using the fun fact and the size of her tank. a. Given that 1 liter = cubic kilometers, rewrite the size of the tank in cubic kilometers using scientific notation. b. Determine the volume of all the oceans in the world in cubic kilometers using the fun fact. c. You liked Pat s fish so much you bought a fish tank of your own that holds an additional 75 liters. Pat asked you to figure out a different fun fact for your fish tank. Pat wants to know how many tanks of this new size would be needed to fill the Atlantic Ocean. The Atlantic Ocean has a volume of 323,600,000 cubic kilometers. Date: 10/17/14 150

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