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Science · Drill 44

Science practice 44

11 questions ~9 min recommended
⏱ 00:00
Score
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Planet Classification Gas Giant Carbon Orb Water Rocky Earth Composition Hydrogen helium Rock Iron/nickelcarbon Diamond Carbon monoxide Silicon carbide Silicates Iron Water, Silicate Nickel (molten and solid Rock Stars Orbited by Planet Type OGLE TR 132 Gliese 777 PSR 1257 Gliese 581 Kepler 11 HD 69830 Mass Range (Earth = 1) 250-1000 .5-25 .5-25 .5-25

Planet 2 5 6 7 Star That the Planet Orbits Gliese 777 Gliese 581 Gliese 581 Kepler 11 OGLE TR 132 HD 6980 PSR 1257 Planet Mass (Earth Mass = 1) 500 20 10 15 315 15 4 Orbital Radius (Earth Orbit =1) 4.0 20 4.0 3.5 .35 .5 25

Energy Savings Zone 1 Zone 5 (in million BTUs) (colder) Zone 3 (warmer) Natural gas 4.2 2.7 0.9 Petroleum 0.04 0.02 0.22 Coal 0.81 0.98 0.93 Hydropower 0.06 0.02 0.03 Nuclear 0.26 0.26 0.19 Other Total annual 0.03 5.41 0.02 0.23 4.01 2.50 U.S. Average 2.37 0.04 0.76 0.06 0.25 0.03 3.51

which was sure

Payback over Years 30- 25- 20- 15- 10- 5- 0+ • Energy Payback •GHG Payback Tone T Zone 3 Zone 513467891011

Astronomers have found over 400 planets orbiting stars. The discovered planets have a variety of compositions, masses, and orbits. Despite the variety, the universal rules of physics and chemistry allow scientists to broadly categorize these planets into just a few types: Gas Giant, Carbon Orb, Water World, and Rocky Earth. Table 1 shows the composition of the various planet types and typical mass ranges relative to Earth.

Table 1

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Table 2 shows a sampling of planets orbiting various stars described in Table 1. These planets are merely numbered 1–7. Table 2 details the masses and orbital radii of the planets.

Table 2

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1. The data in Table 1 and Table 2 support which of the following statements?

2. According to Table 1 and Table 2, which of the following stars has the most massive Gas Giant planet orbiting it?

3. If a new planet were discovered, with a mass of 325, an orbital radius of 1.5, and a composition of mostly hydrogen, what would be its most likely classification?

4. All of the following are true about the star Gliese 581 EXCEPT:

5. The Rocky Earth planets in Table 2 have what in common?

A group of researchers studied the greenhouse gas (GHG) and energy savings associated with rigid plastic foam sheathing used to insulate single-family housing. The results show the typical annual energy savings for a single house in the United States. Table 1 displays energy savings for various temperature zones, whereas Table 2 shows GHGs avoided.

Table 1

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Table 2

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There is an initial use of energy and GHG released when the insulation is installed, but large savings result from the use of the product over time. After the “payback” time expires, there is a net savings in energy and GHG emissions for as long as the insulation is in place. Figure 1 displays the payback time in years for energy savings and GHGs avoided.

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Figure 1

6. Foam sheathing proved to create the highest energy savings in Zone 5 for what type of energy?

7. According to the data presented in Table 1 and Table 2, which of the following is true?

8. According to Figure 1, the GHG payback for Zone 3 is approximately:

9. According to Table 1, what zone and fuel combination yield the greatest energy savings after 1 year?

10. Ten years after installing rigid plastic foam sheathing in Zone 3, which of the following is true?

11. Based on the data in Table 1, which of the following lists the fuels that yielded the highest average energy savings, in decreasing order?

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