Flashcard library · Earth Science
Astronomy: The Solar System
Master the essentials of our cosmic neighborhood with these "Astronomy: The Solar System" flashcards. This deck covers fundamental concepts from planetary characteristics to celestial mechanics, perfect for reviewing key facts before an exam. Focus on the core knowledge needed to understand the Solar System's structure and phenomena.
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What theory explains the formation of the Solar System?
The nebular hypothesis, which states that the Solar System formed from a rotating cloud of gas and dust called a solar nebula.
What is the primary source of the Sun's energy?
Nuclear fusion, specifically the conversion of hydrogen into helium in its core.
Name the four terrestrial planets in order from the Sun.
Mercury, Venus, Earth, and Mars.
Name the four gas/ice giants in order from the Sun.
Jupiter, Saturn, Uranus, and Neptune.
What is the leading theory for the formation of Earth's Moon?
The Giant Impact Hypothesis, which suggests a Mars-sized object collided with early Earth, ejecting material that formed the Moon.
Where is the main asteroid belt located in the Solar System?
It is located between the orbits of Mars and Jupiter.
What is the Kuiper Belt and where is it located?
The Kuiper Belt is a region beyond Neptune's orbit containing numerous icy bodies and dwarf planets like Pluto.
What distinguishes a dwarf planet from a planet?
A dwarf planet orbits the Sun and is nearly spherical due to its own gravity, but it has not cleared its orbital path of other debris.
What is the Great Red Spot on Jupiter?
It is a persistent, enormous storm system, larger than Earth, that has been observed for centuries in Jupiter's atmosphere.
What are Saturn's prominent rings primarily composed of?
They are composed of billions of small particles of ice and rock, ranging in size from dust grains to boulders.
What astronomical body is primarily responsible for Earth's ocean tides?
The Moon, due to its gravitational pull varying across Earth's surface, creating tidal bulges.
What causes the Earth's seasons?
The tilt of Earth's rotational axis relative to its orbital plane around the Sun, leading to varying angles of sunlight throughout the year.
What are comets primarily made of and what kind of orbit do they usually have?
Comets are primarily made of ice, dust, and rock ('dirty snowballs') and typically have highly elliptical orbits that bring them close to the Sun.
What makes Venus's atmosphere so extreme?
Its extremely dense atmosphere, predominantly carbon dioxide, creates a runaway greenhouse effect resulting in very high surface temperatures and pressure.
What geological evidence suggests that liquid water once flowed on Mars?
Mars exhibits features like dried-up riverbeds, delta formations, and mineralogical evidence of past interaction with water, indicating a warmer, wetter ancient environment.