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- 1. Multiple Choice
Which of the following characteristics do all planets need to have to be classified as a planet?
be a sphere (roughly)
orbit the sun
not orbit another planet
have life
must clear its own orbit (must be the dominant body in the orbit)
- 2. Multiple Choice
Why was Pluto reclassified as a dwarf planet in 2006?
because it was deemed too small
because it has no moons
because scientists discovered that it crosses the orbit of Neptune and isn't the biggest spherical body in its orbit.
it isn't spherical
- 3. Multiple Choice
Which of the following statements is true?
the Sun moves across the sky
the Sun only appears to move across the sky and in fact does NOT move. It only appears this way because the Earth rotates every 24 hours
The Sun orbits the Earth which is why we have day and night
- 4. Fill in the Blank
Years ago, people believed the planets and sun orbited Earth. This model was known as the...
- 5. Fill in the Blank
What is the name of the model which suggests that the planets all orbit the sun?
- 6. Multiple Choice
How long does it take for the Earth to rotate (spin) once on its axis?
24 hours
12 hours
365 days
1 hour
- 7. Multiple Choice
How long does it take for the Earth to orbit (revolve) around the sun?
365 days
24 hours
28 days
1 day
- 8. Multiple Choice
Why does the Moon appear to be different shapes at various times?
because the Sun blocks the moon creating different shapes
because as the Moon rotates and orbits around Earth, the Sun lights up different parts of it.
because the Earth orbits the sun causing it to appear differently each year
- 9. Multiple Choice
How long does it take for the Moon to orbit the Earth?
24 hours
365 days
27-28 days
1 hour
- 10. Multiple Choice
Which is the correct order of the planets starting from the Sun?
Venus, Mercury, Saturn, Uranus, Pluto, Mars, Earth, Jupiter
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Neptune, Uranus, Saturn, Jupiter, Mars, Earth, Venus, Mercury
Mercury, Venus, Earth, Moon, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
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