Planet's in our Solar System?

I have A TON of Science homework concept reviews to do for tomorrow, and I need MAJOR help. Anyone?! -Identify: >Identify which planet. 1. First planet to be discovered using observed gravitational anomalies? 2. The most habitable planet? -Calculate: >Calculate the relationship of the diameter of... show more I have A TON of Science homework concept reviews to do for tomorrow, and I need MAJOR help. Anyone?!

-Identify:
>Identify which planet.

1. First planet to be discovered using observed gravitational anomalies?
2. The most habitable planet?

-Calculate:
>Calculate the relationship of the diameter of each of the following bodies to Earth (12 765 km), and write a comparison to describe each.

1. The Moon (3476 km)
2. Mercury (4878 km)
3. Venus (21 102 km)
4. Mars (6787 km)
5. Jupiter (142 800 km)
6. Saturn (120 660 km)
7. Uranus (52 400 km)

*If you can't do all of the questions thats fine. Just please explain which one you're doing. Thank's so much in advance (:
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