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| 1 | |
The International Astronomical Union defines a planet as… |
| | A) | an object that shares its orbit with other objects. |
| | B) | an object that orbits one or more stars and is not a star itself. |
| | C) | a star that orbits other stars and is spherical. |
| | D) | an object that is not spherical and that orbits stars. |
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| 2 | |
Which model of the solar system suggests that Earth is the centre of all planetary motion? |
| | A) | Kepler’s model |
| | B) | geo-heliocentric |
| | C) | heliocentric |
| | D) | geocentric |
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| 3 | |
Which of the following best describes a terrestrial planet? |
| | A) | large, with a solid core and a rocky crust |
| | B) | small, with a solid core and a rocky crust |
| | C) | large, with a liquid core and gaseous bands |
| | D) | small, with a gaseous band, or series of bands, and an icy crust |
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| 4 | |
One astronomical unit (AU) is equal to the average distance from… |
| | A) | Earth to the Sun. |
| | B) | the Sun to Mars. |
| | C) | Earth to the Moon. |
| | D) | the Sun to the Moon. |
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| 5 | |
Which of the following planets are classified as gaseous giants? |
| | A) | Mercury, Venus, and Mars |
| | B) | Earth, Mars, and Jupiter |
| | C) | Mercury, Jupiter, and Venus |
| | D) | Jupiter, Uranus, and Neptune |
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