1.which is the hottest planet?
2.which is the coldest planet?
3.which planet's temperature is closest to that of earth? (note: water boils at 4.100°c/212°f. water freezes at 0°c/32°f)
5.which planet has the greatest gravitational attraction?
6.which planet has the least gravitational attraction?
7.which planet's gravitational pull is closest to that of earth?
8.do any of the planets have oxygen in their atmosphere?
9.which planet's atmosphere most resembles that of earth?
10do any of the planets have flowing water?
11.which planet's water resources (solid, gas, or liquid) might be close to the amount on earth?
12.which planet most resembles earth in terms of all of the factors: temperature, gravity, atmosphere, and water?
13.if earth became an uninhabitable planet, which planet do you think would be the next best to live on? explain your answer.

1. The hottest planet would be the mercury.
The closer a planet to the sun, the hottest the temperature of that planet will become. During the day, the temperature in mercury could obtain 427 degree celcius which could even melt several forms of metals.

2. The coldest planet would be the Neptune
Since now pluto is no longer considered a planet, the planet that located the furthest from the sun and the coldest one would be neptune, which had the average temperature of -213 degree celcius

3. the answer is Mars.
Due to this close similarties, we already made an effort to start and develop human civilization on that planet (which is led by a famous figure Elon Musk)

5. The answer is jupiter
Gravitational attraction is directly correlated to the mass of the planet. When it's measured, jupiter gravitational pull is about 2.4 times larger compared to the earth's

6. The answer mercury
Mercury is currently the smallest planet since pluto now out of the equation. When its measured, Mercury gravirtational pulll is about 0.383 times compared to the earth's

7. The answer is venus
Venus has the most similar size with the planet earth. When it's measured, Venus gravitational pull is about 0.91 times compared to the earth's

8. the answer is mars, jupiter, and Earth
But from the three planets, the air composition that humans can take without having any additional device is only Earth,  the others have too much Carbon dioxide composition for humans to handle

9.The answer is Mars
like mentioned above, because of the smilarties in gas, water, and temperature, Mars probably the next livable planet for humans beside the planet earth

10. The answer is Earth and Mars.
At first, we thought that Earth is the only one that has it. But in 2015, NASA found that Mars has some water flow even though it only ran intermittently.

11. The answer is Mars.
The only problem is the amount. Mars currently does not have enough flowing water to sustain humans life and it has too much composition of air that will be dangerous for humans

12.  Again, the answer is Mars
For all the reasons that mentioned above

13. The answer is Mars.
In order to live, what we need is food, water, air, and the temperature that do not kill us. Mars has the all of those things, eventhough the amount might not be as ideal as the earth. Currently, besides NASA, private sectors such as Space X has came in to try and solve this problems for us.