1.Planet Earth is considered habitable because of the following reasons: (1) it has the right distance from the sun; (2) it is protected from harmful solar radiation by its magnetic field;
(3) it is kept warm by an insulating atmosphere; and
(4) it has the right amount of ingredients for life, including water and carbon.
2.Earth is different from other planets in a way that it is the only planet with liquid water on the surface. a. Earth, Venus, and Mars may have similarities:
(1) They all are terrestrial planets, made of solid rocks and silicates;
(2) They all have an atmosphere;
(3) They all almost have the same time to rotate on their axes;
(4) Earth and Mars both have water;
(5) They all have carbon dioxide; and
(6) All have landforms. a. Earth, Venus, and Mars have differences:
(1) Venus has no water;
(2) Venus and Mars don’t have oxygen; and
(3) Earth has life forms.