PHSC 121 LIBERTY UNIVERSITY EXAM 3 QUESTIONS
WITH ALL COMPLETE ANSWERS
We have seasons because - (ANSWER)the earth's axis of rotation is tilted 23.5 degrees relative
to the ecliptic
Which of the following is true of the vernal equinox - (ANSWER)the Sun is now crossing the
equator into the northern hemisphere and the northern hemisphere begins to face toward the Sun
For someone standing on the Tropic of Cancer, the sun will appear at the observer's zenith
___________ each year and at the equator an observer will see the sun at zenith ___________
each year - (ANSWER)once/twice
Which of the following is MOST important in creating our seasons today - (ANSWER)the angle
of the sunlight when it strikes the ground
The Earth is farthest from the Sun in __________ and the Earth - Sun distance varies about
_________ % in a year - (ANSWER)July/3
Tides on the Earth are caused mostly by - (ANSWER)the Moon because it is closer to the earth
than the Sun
Highest tides occur during which phase of the moon? - (ANSWER)New and Full
How frequently does a Spring tide occur? - (ANSWER)twice each month
The effect of the Sun on Earth tides is about ____________ x the effect of the Moon. Also, water
tidal ranges (height of the tides) can be from about 30 cm to about ____________ meters. -
(ANSWER)half/16
, Which of the following is not true of the winter solstice? - (ANSWER)the northern hemisphere
receives the most direct sunlight of the year
Each location on the Earth experiences _____________ high and low tide(s) each 24 hours. The
high tides occur when the observer's location on the Earth is ____________ -
(ANSWER)2/facing the moon and then on the opposite side fo the Earth from the Moon
A black hole is - (ANSWER)a region in space where mass produces a gravity field so intense
that neither matter nor light itself can escape
Black holes are thought to be caused by - (ANSWER)collapsing stars
concentrated mass at the center of galaxies
A quasar is - (ANSWER)a large remote energy source which may contain a black hole
Quasars are thought to be caused by - (ANSWER)high energy radiation emission from the cores
of galaxies
How does the Nebular hypothesis say the Solar System formed? - (ANSWER)a large rotating
gas cloud existed and compressed into the Sun with the planets forming by collisions and
accretion of rotating masses
The frost line is - (ANSWER)the boundary lying between Mars and Jupiter, separating the hot
interior of the original gas cloud from the cooler outer regions where hydrogen could condense
Why, theoretically are the inner planets made of rocks and the outer planets of gas? -
(ANSWER)the inner planets formed by minority rocky substances but the majority substance,
hydrogen, could only condense into planets in the outer regions
According to the Nebular Cloud Theory of Solar System development, the Jovian planets began
as planetesimals composed mostly of ____________ . The cores grew until ___________ was
WITH ALL COMPLETE ANSWERS
We have seasons because - (ANSWER)the earth's axis of rotation is tilted 23.5 degrees relative
to the ecliptic
Which of the following is true of the vernal equinox - (ANSWER)the Sun is now crossing the
equator into the northern hemisphere and the northern hemisphere begins to face toward the Sun
For someone standing on the Tropic of Cancer, the sun will appear at the observer's zenith
___________ each year and at the equator an observer will see the sun at zenith ___________
each year - (ANSWER)once/twice
Which of the following is MOST important in creating our seasons today - (ANSWER)the angle
of the sunlight when it strikes the ground
The Earth is farthest from the Sun in __________ and the Earth - Sun distance varies about
_________ % in a year - (ANSWER)July/3
Tides on the Earth are caused mostly by - (ANSWER)the Moon because it is closer to the earth
than the Sun
Highest tides occur during which phase of the moon? - (ANSWER)New and Full
How frequently does a Spring tide occur? - (ANSWER)twice each month
The effect of the Sun on Earth tides is about ____________ x the effect of the Moon. Also, water
tidal ranges (height of the tides) can be from about 30 cm to about ____________ meters. -
(ANSWER)half/16
, Which of the following is not true of the winter solstice? - (ANSWER)the northern hemisphere
receives the most direct sunlight of the year
Each location on the Earth experiences _____________ high and low tide(s) each 24 hours. The
high tides occur when the observer's location on the Earth is ____________ -
(ANSWER)2/facing the moon and then on the opposite side fo the Earth from the Moon
A black hole is - (ANSWER)a region in space where mass produces a gravity field so intense
that neither matter nor light itself can escape
Black holes are thought to be caused by - (ANSWER)collapsing stars
concentrated mass at the center of galaxies
A quasar is - (ANSWER)a large remote energy source which may contain a black hole
Quasars are thought to be caused by - (ANSWER)high energy radiation emission from the cores
of galaxies
How does the Nebular hypothesis say the Solar System formed? - (ANSWER)a large rotating
gas cloud existed and compressed into the Sun with the planets forming by collisions and
accretion of rotating masses
The frost line is - (ANSWER)the boundary lying between Mars and Jupiter, separating the hot
interior of the original gas cloud from the cooler outer regions where hydrogen could condense
Why, theoretically are the inner planets made of rocks and the outer planets of gas? -
(ANSWER)the inner planets formed by minority rocky substances but the majority substance,
hydrogen, could only condense into planets in the outer regions
According to the Nebular Cloud Theory of Solar System development, the Jovian planets began
as planetesimals composed mostly of ____________ . The cores grew until ___________ was
