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1. As mentioned before, our asteroid is in the shape of a sphere and has a mass of 2000 kilograms. Determine the density (in grams per cubic centimeter) of this asteroid if its diameter is known to be 2.4 meters.

Useful information: 1 kg = 1000 g, 1 m = 100 cm, volume of sphere = 4/3 Ï€ r³. Remember that the radius of a sphere is equal to half its diameter. Show all of your work. 

2. How does your calculated density (in grams per cubic centimeter) compare to the density of liquid water? Would you expect this asteroid to float or sink in water based on your calculations? What else do you need to take into consideration when making your decision? Explain your answers fully. 

3. One side of our asteroid is constantly illuminated by the Sun while the other side remains in the dark. Do you expect there to be a temperature difference between the light and dark sides? Explain why or why not. If the two sides are at different temperatures, how might heat transfer from one side to the other? Note that our asteroid does not have enough gravity to hold an atmosphere. 

4. Occasionally an asteroid will break into fragments due to a collision. These fragments can leave the asteroid belt and even make their way to Earth. Some asteroid fragments do not completely burn up in the atmosphere and end up on the surface of Earth. It is possible for such a fragment to be radioactive. What is the chief cause of radioactivity? If you had a radiation detector that could measure the amount of radiation—but not the type of radiation—how could you determine which type of radiation was being emitted? 

5. Asteroids are mainly composed of metals like iron and nonmetals like carbon. Explain at least three differences between metals and nonmetals, and describe the locations of metals and non-metals within the periodic table. Specifically use iron and carbon in your explanation. 

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