Ecliptic/Quizzes/Quiz 1

This is one of two quizzes pertinent to Ecliptic (permalink)] that is also relevant to the Antikythera_mechanism/Quizzes. Randomized versions of this quiz are available on this Testbank. See also How to use this testbank. (These quizzes will be linked to w:Ecliptic after they have been verified.)

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Ecliptic quiz 1 (basic-geocentric)

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1 The ecliptic is the set of all points on the celestial sphere

	occupied by the Moon over the course of one month.
	occupied by the Sun and Moon during eclipse season.
	occupied by the Sun over the course of a year.
	occupied by the Sun over the course of one day.
	occupied by the Moon over the course of one day.

2 Two great circles on a sphere meet at ______ point(s)

	0
	1
	2
	3
	4

3 A star in any of the 12 zodiacal constellations rises and sets near where the Sun rises and sets, except that the cycle is repeated every 24 hours minus approximately 4 minutes.

	true
	false

4 Four minutes times 365 is approximately one

	day
	year
	month
	week

5 As the Sun rises and sets it typically spends 4 minutes in each constellation of the Zodiac

	true
	false

6 One minute of arc describes and angle 60 times smaller than one degree, which is NOT equal to the observed angular motion of a star in one minute.

	true
	false

7 One minute of arc describes and angle 60 times smaller than one degree, which nearly equals the observed angular motion of a star in one minute.

	true
	false

8 In the course of a year, the Sun is always in or near one of the 12 zodiacal constellations

	true
	false

9 ${\frac {360}{24}}={\frac {36\cdot 10}{12\cdot 2}}={\frac {12\cdot 3\cdot 5\cdot 2}{12\cdot 2\,}}$, calculates that the Sun moves 15

	degrees per day compared to the fixed stars
	degrees per hour across the sky
	degrees per hour compared to the fixed stars
	degrees per day across the sky

10 ${\frac {360\,{\text{degrees}}}{30\,{\text{days}}}}={\frac {36}{3}}\,$, calculates that the Moon moves approximately 13 ______

	degrees per hour across the sky
	degrees per hour compared to the fixed stars
	degrees per day compared to the fixed stars
	degrees per day across the sky