Astronomy 101, Exam #1 C

Name______

No notes, No books. You can use a calculator c = 3 x 108 m/s 1 AU = 1.49 ×1011 meters 1 light year = 9.46 × 1015 meters

-34 24 30 h = 6.626 x 10 J●s mass of Earth = 5.97 × 10 kg mass of Sun = 1.99 x 10 kg G = 6.67 × 10-11 m3 kg-1 s-2 mass of Moon = 7.35 x 1022 kg mass of Jupiter = 1.90 x 1027 kg g = 9.8 m/s2 radius of Earth = 6.38 × 106 m radius of Jupiter = 7.15 × 107 m σ = 5.67 x 10-8 W m-2 K-4 1 nm = 1 x 10-9 meters radius of Moon = 1.74 × 106 m

1) Which of these statements is not true about the object 136199 Eris.

A) Eris orbits the Sun. B) Eris has a moon called Dysnomia. C) Eris was discovered in the 1990s D) Eris is more massive than Pluto. E) Eris is now labeled as a dwarf planet.

2) Which of these objects is considered a dwarf planet?

A) Ganymede B) Phobos C) Mercury D) Haumea E) Io

3) The fifth planet from the Sun is …

A) Mars B) Saturn C) Jupiter D) Neptune E) Uranus

4) The largest moon of Pluto is …

A) Charon B) Ceres C) Haumea D) Makemake E) Ganymede Astronomy 101, Exam #1 C

5) Which of these bodies is not considered a dwarf planet?

A) Pluto B) Makemake C) Eris D) Rigel E) Ceres

6) How many meters are in 10,000 kilometers?

A) 1 x 105 meters B) 1 x 106 meters C) 1 x 107 meters D) 1 x 108 meters E) 1 x 109 meters

7) What is the difference in the definition of a planet and a dwarf planet?

A) Planets have satellites while dwarf planets don’t have satellites B) Planets orbit the Sun while dwarf planets don’t orbit the Sun. C) Planets are round while dwarf planets are not round. D) Planets have cleared the neighborhood around their orbits while dwarf planets have not. E) Planets have nuclear fusion occurring in their cores to produce energy while dwarf planets do not have nuclear fusion occurring in their cores

8) Put these items in order from largest size to smallest size: Largest  Smallest

A) Our Universe, Our Galaxy, Our Solar System B) Our Galaxy, Our Universe, Our Solar System C) Our Solar System, Our Galaxy, Our Universe D) Our Galaxy, Our Solar System, Our Universe E) Our Universe, Our Solar System, Our Galaxy

9) Which of these bodies has the most elliptical orbit?

A) Venus B) Jupiter. C) Saturn D) Pluto E) Eris Astronomy 101, Exam #1 C

10) How many kilometers are in 10 meters?

A) 1 x 104 meters B) 1 x 10-4 meters C) 1 x 10-2 meters D) 1 x 10-3 meters E) 1 x 103 meters

11) Assume that each galaxy has 1 x 1011 stars. How many stars will be in 1 x 105 galaxies?

A) 1 x 1055 stars B) 1 x 1015 stars C) 1 x 1016 stars D) 2 x 1015 stars E) 2 x 1016 stars

12) Put these planets in order from largest diameter to smallest diameter: Largest  Smallest

A) Jupiter, Saturn, Mercury, Earth B) Saturn, Jupiter, Mercury, Earth C) Jupiter, Saturn, Earth, Mercury D) Jupiter, Earth, Saturn, Mercury E) Saturn, Jupiter, Mercury, Earth

13) A lunar eclipse occurs during a …

A) New Moon B) Full Moon C) First Quarter Moon D) Third Quarter Moon E) Waning Crescent

14) Seasons on the Earth are a consequence of …

A) the varying distance between the Earth and the Sun during the year. B) the varying speed of the Earth in its orbit about the Sun. C) the precession of the Earth's rotation axis. D) the tilt of the Earth's rotation axis relative to the ecliptic. E) the tilt of the Moon's orbital plane relative to the ecliptic.