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Figure-Based Questions
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1

Use Figure 27.8 to find the width (in AU) of the Sun's habitable zone.
2

Use Figure 27.9 to find the age of the Sun when the Sun's habitable zone moves beyond the Earth's orbit. Given the age of the Sun (4.5 billion years), how long will it be before the Earth ceases to be in the Sun's habitable zone?
3

Use Figure 27.9 to find how long will it be before Mars is within the Sun's habitable zone.
4

Use Figure 27.9 to find how long Mars will be within the Sun's habitable zone.





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