IMFs Project - Checkpoint #7 - Cloudy w/ a Chance of Heavy Metal

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IMFs Project - Checkpoint #7 - Cloudy w/ a Chance of Heavy Metal - Due 5/19/20

In the previous checkpoint, you learned how to interpret a phase diagram for a given element. In this checkpoint, you will be reading an article about iron rain on a gaseous planet in a distant solar system and answering some questions that require you to use and think critically about phase diagrams.

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Heavy Metal Rain From the Skies of Planet 76b

Here is a link to the article - https://bit.ly/2LtF7M0

Phase Diagram for Pure Iron

Iron is solid in the yellow, orange, and red sections of the diagram.

1. What substance was identified as a gas in the atmosphere of exoplanet WASP 76b? When was the gas seen and when was it not seen in the atmosphere? What do scientists think happens to the substance over the course of a day and night on the planet? What does that mean in terms of the substance’s phase of matter? *

1 point

2. Name the phases of matter of a substance, and describe the general differences in their shape and volume. Explain your answers in terms of the phase’s relative strength of intermolecular attraction forces, or the forces of attraction between the atoms or molecules within a substance. *

1 point

Based on the article, what factor affects the phase of matter of a substance? Explain. *

1 point

3. A phase diagram shows how temperature and external pressure on a substance affects its phase of matter. Draw a general phase diagram including regions for solid, liquid, and gas. Use this Purdue University page as a reference - https://bit.ly/2WVcqN9 , if needed. Label your axes with appropriate titles and units, and include regions for each phase of matter. *

1 point

4. How can a change in pressure affect the phase of matter of a substance at a constant temperature (assume the temperature is one where all three phases of matter can exist)? Explain your answer using the diagram and your knowledge about the strength of attraction between molecules. *

1 point

5. How do you think Earth’s atmosphere compares with that of WASP 76b’s? Explain your answer in terms of temperature and pressure and potential composition. *

1 point

6. What are some factors of the atmosphere that affect weather patterns? Given these factors, what might contribute to differences in wind weather patterns on WASP 76b and Earth? How does the “iron weather” on WASP 76b compare with “water weather” on Earth? *

1 point

7. Imagine your own exoplanet with an atmosphere different from Earth’s. Explain the general conditions on the planet, as well as the atmospheric composition and general weather patterns that make the planet special. Research an additional phase diagram to inform your answer. Include at least two data points from a substance’s phase diagram in your response. For additional inspiration, check out NASA’s Exoplanet Exploration, which describes known exoplanets. *

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