Our Solar System
Until 1994, Neptune had a persistent storm, the Great Dark Spot, with characteristics similar to Jupiter's Great Red Spot.
True
Uranus was discovered accidentally in 1981.
True
Jupiter spins once on its axis in a little less than...
10 hours.
One day on Venus is equal to how many days on Earth?
243 days
What percentage of all planetary matter in the solar system is in Jupiter's mass?
70%
The surface of Mercury is similar to the surface of...
the Moon.
Observations of Mercury suggest that it was originally much larger, with a mantle and crust similar to that of...
Earth.
Earth's atmosphere is moderately dense and is composed of 78 percent oxygen and 21 percent nitrogen.
False
Mar's atmosphere is similar to that of Venus, and it has a strong greenhouse effect.
False
Most of Uranus's atmosphere is composed of helium and hydrogen, which causes its atmosphere to reflect blue light back into space.
False
Neptune's largest moon, Triton, has a retrograde orbit, which means it orbits like every other satellite in the solar system.
False
Only Earth has a greenhouse effect.
False
Saturn is the only planet with rings.
False
The southern hemisphere of Mars is dominated sparsely cratered plains.
False
Today, we are certain that Uranus has no moons and 15 rings.
False
Uranus has a large, solid core that extends almost to the planet's surface.
False
Uranus's tilt and its great distance from the Sun result in seasons on Uranus that last about 21 Earth years.
False
Which of Jupiter's largest moons is almost completely molten inside?
Io
The closest planet to the Sun is
Mercury
Saturn's largest moon is named...
Titan.
Earth's distance from the Sun and its nearly circular orbit allow water to exist on its surface as a solid. liquid, gas.
True
Mars is referred to as the red planet as a result of its high iron content and reddish appearance.
True
Neptune's six rings are composed of microscopic dust particles.
True
The rotational axis of Uranus is tipped over so far that the north pole almost lies in its orbital plane.
True
Triton has nitrogen geysers and a thin atmosphere.
True
The brightest planet in Earth's nighttime sky is...
Venus.
What is Jupiter's Great Red Spot?
an atmospheric storm.
Low, warm, dark-colored, sinking clouds in Jupiter's atmosphere are known as...
belts.
Galileo discovered Jupiter's atmosphere remains in...
both gas and liquid forms.
The atmosphere of Venus is mostly...
carbon dioxide and nitrogen.
Many astronomers hypothesize that Saturn's rings were formed from...
debris left over from collisions of asteroids and other objects.
Jupiter's four moons are composed of...
ice and rock.
The form of hydrogen that has properties of both a liquid and a metal is...
liquid metallic hydrogen.
Venus's spin is an example of...
retrograde rotation.
Radar measurements show that the surface of Venus is very hot and that is...
rotating slowly.
The four inner planets of our solar system are
terrestrial planets
How many times bigger than Mercury is Earth?
three times