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Questions and Answers
Mercury has an atmosphere made of carbon dioxide and sulfuric acid clouds.
Mercury has an atmosphere made of carbon dioxide and sulfuric acid clouds.
False (B)
Saturn's low density allows it to float in a large ocean.
Saturn's low density allows it to float in a large ocean.
False (B)
Uranus has a higher number of known moons than Saturn.
Uranus has a higher number of known moons than Saturn.
False (B)
Neptune takes less than 100 years to complete one orbit around the sun.
Neptune takes less than 100 years to complete one orbit around the sun.
Pluto was declared a planet in 2006.
Pluto was declared a planet in 2006.
The Great Red Spot is a giant storm on Mars.
The Great Red Spot is a giant storm on Mars.
Venus is Earth's sister planet with extreme temperatures and no atmosphere.
Venus is Earth's sister planet with extreme temperatures and no atmosphere.
Jupiter is the smallest planet in the solar system.
Jupiter is the smallest planet in the solar system.
Mars has two small moons that are possibly captured asteroids.
Mars has two small moons that are possibly captured asteroids.
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Study Notes
- The solar system is centered around the sun, which makes up over 99% of its mass.
- The sun's massive gravity holds the solar system together and provides heat and light essential for life on Earth.
- Mercury is the smallest planet, resembling Earth's moon, with extreme temperatures and no moons or atmosphere.
- Venus, Earth's sister planet, is hot with a thick atmosphere of carbon dioxide and clouds of sulfuric acid.
- Mars, the red planet, has a thin atmosphere with water ice, two small moons possibly captured asteroids, and robots exploring its surface.
- Jupiter, a gas giant, is the largest planet with at least 67 moons, including some as large as Mercury, and a giant storm called the Great Red Spot.
- Saturn, another gas giant, is famous for its beautiful rings made of ice particles, rocks, and dust, and it could float in a large bathtub due to its low density.
- Uranus is a gas giant tilted on its side with smaller rings than Saturn and 27 known moons, covered in blue methane clouds.
- Neptune, a dark blue gas giant farther out in space, has a few thin rings, 14 moons, and the longest orbit of any planet, taking over 164 years to orbit the sun.
- Pluto was declared a dwarf planet in 2006 due to its small size compared to other planets, leading to the recognition of at least 6 dwarf planets in the solar system.
- The solar system consists of 8 official planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
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