astr homework 2

If there is a first quarter Moon out tonight, approximately how long from now will it be in the third quarter phase?

2 weeks

Which of the following statements about the Moon is true? Select one: a. The Moon's distance from Earth varies during its orbit. b. The moon is only visible at night c. If you see a new Moon from North America, someone in South America would see a full Moon. d. The Moon goes through a cycle of phases because it always has the same side facing Earth. e. The side of the Moon facing away from Earth is in perpetual darkness.

a. the moon's distance from Earth's varies during its orbit

If you see a full Moon tonight, approximately how long would you have to wait to see the next full Moon? a. 3 weeks b. 5 weeks c. 1 week d. 4 weeks e. 2 weeks

d. 4 weeks

If the Moon is setting at midnight, the phase of the Moon must be Select one: a. waxing crescent b. full. c. waning crescent d. first quarter e. third quarter

d. first quarter

What makes the North Star, Polaris, special? Select one: a. It can be used to determine your longitude on Earth. b. It is the star directly on your northern horizon. c. It is the star straight overhead. d. It appears very near the north celestial pole. e. It is the brightest star in the sky.

d. it appears very near the north celestial pole

The moon keeps the same hemisphere facing Earth because the _________ is equal to the _________. Select one: a. rotational period of Earth; orbital period of the Moon around Earth b. Orbital period of Earth; orbital period of the Moon around Earth c. rotational period of Earth; orbital period of Earth d. rotational period of the Moon; orbital period of the Moon around Earth e. orbital period of the Moon around Earth; rotational period of Earth

d. rotational period of the moon; orbital period of the moon around earth

Which of the following is false? a. The phases of the Moon cycle with a period that is longer than its sidereal period. b. In some phases, the Moon can be observed during the day. c. A full Moon can be seen on the eastern horizon at sunset. d. The observed phase of the Moon changes over the course of one night. e. Everyone on Earth observes the same phase of the Moon on a given night.

d. the observed phase of the moon changes over the course of one night

If Earth's axis were tilted by 35° instead of its actual tilt, how would the seasons be different than they are currently? a. Summers would be colder b. summers would be shorter c. Winters would be shorter d. winters would be colder e. The seasons would remain the same

d. winters would be colder

The altitude of the north star (Polaris) is equal to your latitude on Earth. At what latitude on Earth would the north celestial pole be at your Zenith?

90+ degrees

in which direction on the horizon does a crescent moon rise?

b. east

In regard to the phase of the Moon, the term "waxing* means a. less than half-illuminated. b. illuminated area increasing. c. more than half-illuminated. d. becoming smaller e. illuminated area decreasing.

b. illuminated area increasing

The Orion Constellation is visible on winter evenings but not summer evenings because of Select one: a. baseball on television. b. the location of Earth in its orbit. c. the precession of Earth's axis. d. the tilt of Earth's axis. e. interference from the full Moon.

b. the location of earth in its orbit

What conditions are required for a lunar eclipse? Select one: a. The phase of the Moon can be new or full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. b. The phase of the Moon must be full, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. c. The phase of the Moon must be new, and the nodes of the Moon's orbit must be nearly aligned with Earth and the Sun. d. The phase of the Moon must be full, and the Moon's orbital plane must lie in the ecliptic. e. The phase of the Moon must be new, and the Moon's orbital plane must lie in the ecliptic.

b. the phase of the moon must be full, and the nodes of the moon's orbit must be nearly aligned with Earth and the Sun

The celestial equator Select one: a. defines the path of the Sun through the stars, and it also defines the plane of the solar system. b. is the technical name of the Sun's equator. c. is a projection into space of Earth's equator onto the celestial sphere. d. is another name for the ecliptic

c. is a projection into space of earth's equator onto the celestial sphere

When the northern hemisphere experiences fall, the southern hemisphere experiences a. fall b. winter c. spring d. summer

c. spring

On which day of the year does the Sun reach its northernmost point in the sky? a.The sun always reaches the same altitude. b.vernal equinox c.summer solstice d.autumnal equinox e.winter solstice

c. summer solstice

you are standing on Earth's equator. Which way is Polaris, the North star? Select one: a. on the northern horizon b. directly overhead c. The answer depends on what time of day (or night) it is. d. 30 degrees up, due West e. The answer depends on whether it's winter or summer.

e. the answer depends on whether its winter or summer

If you go out at exactly 9 P.M. each evening over the course of 1 month, the position of a given star will move westward by tens of degrees. What causes this motion? Select one: a. The revolution of the Moon around Earth b. Earth's rotation on its axis c. Einsteins theory of relativity d. The speed of the star through the Galaxy e. the revolution of Earth around the Sun

e. the revolution of Earth around the sun

The day with the smallest number of daylight hours over the course of the year for a person living in the northern hemisphere is the a. summer solstice (June 1) b. autumnal equinox (Sept. 23) c. vernal equinox (March 21) d. The number of daylight hours is always the same. e. winter solstice (Dec. 22)

e. winter solstice (dec. 22)

at midnight it is sometimes possible to observe the crescent moon on the meridian. t/f

false

In regard to the phase of the Moon, the term "waxing* means a. less than half-illuminated. b. illuminated area increasing. c. more than half-illuminated. d. becoming smaller e. illuminated area decreasing.

illuminated area increasing