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The Solar System

a data set by ewendland
created October 28, 2016
What phenomenon do scientists typically use to detect extrasolar planets (exoplanets)?the Doppler shift of stars
Many people used to think that our solar system was the center of the universe. What is wrong with this statement?Our solar system is located within one of the outer spiral arms of the Milky Way galaxy, one of billions of other galaxies in the universe.
According to the most commonly accepted hypothesis, approximately how old is our solar system?5 billion years
In which group of stars is our solar system located?the Milky Way galaxy
According to the most commonly accepted hypothesis, our sun and the celestial objects that orbit it formed from asolar nebula
Approximately how long does it take our solar system to make one revolution about the center of the Milky Way galaxy?250 million years
Currently, the most commonly accepted hypothesis describing the origin of our solar system is called thenebular hypothesis
Which of the following statements is true?Our solar system follows an orbit through the Milky Way galaxy that takes hundreds of millions of years to complete.
How does the Doppler shift of a star help astronomers to detect the presence of an exoplanet?The gravitational pull of an orbiting planet causes an apparent shift in the frequencies of a star's electromagnetic waves.
According to the International Astronomical Union (IAU), why is Pluto no longer considered a planet?It is not massive enough to clear smaller bodies from the neighborhood around its orbit.
Recently, scientists have discovered many exoplanets, or planets beyond our solar system. Many scientists are interested in discovering exoplanets that could potentially sustain life. Which of these strategies should scientists follow to most increase their chances of discovering an exoplanet capable of sustaining life?Scientists should look for exoplanets that orbit their stars at distances that expose the planets to the appropriate amount of energy to allow water to exist in liquid form.
Which statement does NOT correctly identify a planet in the solar system?Mars is an outer terrestrial planet.
The solar system's habitable zone is the location where temperature ranges allowwater to exist in liquid form
Which of the following is the most widely accepted explanation for the origin of our solar system?the nebular hypothesis, which states that gravity caused a small fragment of a huge, rotating cloud of space dust and gas to collapse, forming a large accretion disc that became the sun and planets
A student argues that all planets in the solar system are equally capable of sustaining life. Is the student correct?No. Conditions unique to Earth help it to sustain life. The other planets lack these characteristics; therefore, they are much less likely to sustain life.
The solar system contains several planets with crusts and mantles composed primarily of silicate rocks and minerals. Where are these planets located?between the sun and the asteroid belt only
The most widely accepted explanation for the origin of Earth's moon is calledthe giant impact hypothesis
How large is the sun relative to the Earth?The sun has more than one-million times the volume of Earth.
Which answer best classifies the planets of our solar system based on their physical characteristics?gas giants and terrestrial planets
G. H. Darwin, son of Charles Darwin, proposed the fission theory to explain the origin of Earth's moon. According to the fission theory, the moon was ejected from Earth's mantle as the planet rotated very rapidly. Is this still the most widely accepted explanation for the origin of Earth's moon?No. Most scientists currently think that Earth's moon formed from debris that resulted from a collision between early Earth and a Mars-sized object.
Most scientists think that planets form when the matter in an accretionary disc begins to coalesce (or come together). According to this hypothesis, the accretionary disc surroundsa star
A student learns that a meteorite impact was likely responsible for the mass extinction that killed off the dinosaurs. He worries that the next meteorite that strikes Earth's surface will trigger a similar extinction event that kills off humans. Is the student's fear justified?No. Although meteorite impacts are relatively common, most meteorites burn up in the atmosphere and are quite small when they reach Earth's surface.
The asteroid belt contains hundreds of thousands—possibly millions— of asteroids. What is the most likely reason for this?The asteroids collide repeatedly as they move through the asteroid belt, forming increasingly smaller asteroids.
What is a comet?a small body of ice, rock, and dust that orbits the sun
A meteoroid that reaches Earth's surface is calleda meteorite
Where is the asteroid belt located?between Mars and Jupiter
Which of the following objects is located in the Kuiper belt?Pluto
Which of the following is a scientist most likely to learn from studying minor bodies in the solar system?the composition of the early solar system
Why does a meteor glow?It burns up as it enters Earth's atmosphere.
Which answer best explains why a comet has a tail?As a comet's orbit brings it close to the sun, it heats up and solar wind carries dust and gas away from the comet, forming a temporary tail.
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