The correct answer is the last choice--only Earth, of the planets in our solar system, has an atmosphere rich in oxygen. Only Earth has plants and other photosynthetic life, which is the source of most of the free oxygen in Earth's air. This in turn allows animal life to exist. Oxygen is found in very small amounts on other planets that have atmospheres, such as Venus and Jupiter.
The planet in our solar system with...
The correct answer is the last choice--only Earth, of the planets in our solar system, has an atmosphere rich in oxygen. Only Earth has plants and other photosynthetic life, which is the source of most of the free oxygen in Earth's air. This in turn allows animal life to exist. Oxygen is found in very small amounts on other planets that have atmospheres, such as Venus and Jupiter.
The planet in our solar system with the highest gravity is Jupiter, due to its extreme mass. Jupiter exerts higher gravity than Earth by a factor of 2.5; that is, you would weigh 2.5 times on Jupiter what you do on Earth. As Jupiter is a gas giant you would have a hard time standing on a scale in order to weigh yourself--there is no solid surface!
Earth is not the only planet known to support ice. Ice as we think of it--frozen water--has been found on Mars. Other planets such as Neptune and Uranus are referred to as Ice Giants, and the frozen substances they are made of do seem to have a small amounts of frozen water, as well.
The hottest planet is Venus, due to its atmosphere of CO2 and acids. Temperatures on Venus average 864 degrees fahrenheit (462 degrees celsius). The greenhouse effect of its atmosphere causes Venus to be hotter than Mercury, even though Mercury is closer to the sun.
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