Wright State University Lake Campus/Showcase/Jer S
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Chapter 4: Earth, Moon and Sky[edit | edit source]
4.1 EARTH & SKY[edit | edit source]
Q: What defines the location of the North and South Poles and the equator on planet Earth?
a) Earth’s axis of rotation
Q: What direction does the Earth move as it rotates
Q: A “Great Circle” is
a) An circle on the surface of a sphere whose center is at the center of the sphere.
Q: great circles passing perpendicular through the equator on a globe and used to help find coordinates on East are called
Q: The Prime Meridian passes through which city and is designated as what deg.
a) Greenwich England / 0 deg. Q: Starting at 0 degrees (Greenwich England) longitude is measured to what degrees east or west. a) 180 deg.
Q: What is the name of the latitude designated 0 deg.
a) The equator
Q: What is the latitude of the North Pole and South Pole respectively
a) 90 deg N / 90 deg S (Locating Places in the Sky)
Q: Much like latitude and longitude astronomers use coordinates called ______ and to denote positions in the sky
a) declination / right ascension
Q: The North and South Poles on planet Earth are called ________ by astronomers who use their fixed positions in the sky to help determine the positions of celestial objects.
a) Celestial Poles
Q: Declination is measured in the same way as longitude true or false
a) False … Declination is measured the same way as latitude thus Polaris the star nearest the north celestial pole is at +90 degrees.
Q: The suns path is also called it’s
Q: Right ascension like longitude is based off of a point where the sun crosses the celestial equator, this point is called the ________
a) Vernal Equinox
Q: Right Ascension also called (RA) can be expressed in degrees (angle) or in units of ______
Q: The 360 degrees of RA that it takes to go around the celestial sphere is equal to how many hours
a) 24 hours
Q: In regards to right ascension “RA 5h” is equal to how many degrees
a) 75 degrees (Each 15 deg. or arc is equal to one hour
Q: In what century did French Physicist Jean Focault demonstrate an unambiguous demonstration of the Earth's rotation
a) The 19th Century
4.2 The Seasons[edit | edit source]
Q:The difference in the seasons becomes more pronounced the farther you travel from the equator T/F
Q: The seasons in the Southern hemisphere are ________ of the seasons in the Northern Hemisphere
Q: The distance variation of the Earth to the Sun as the Earth travels it's orbital ellipse is about
Q: The seasons on Earth are caused by
a) The 23.5 degree tilt of Earth's axis
Q: In June the Sun is _______ of the celestial equator
Q: On or about what day does the Sun shine down most directly on the Northern Hemisphere
a) June 21st (The Summer Solstice)
Q: How far North of the equator does the Sun appear on the Summer Solstice
a) +23 deg.
Q: The Tropic of Cancer is -23 Deg. South T/F
Q: The Tropic of Cancer is +23 Deg. North T/F
Q: The Tropic of Capricorn is -23 Deg. South T/F
Q: The Tropic of Capricorn is +23 Deg. North T/F
Q: The latitude where the sun appears at the zenith at noon, on the first day of summer is called
a) The Tropic of Cancer
Q: During the Summer Solstice the Antarctic Circle receives 24 hours of sunlight T/F
a) F (Arctic Circle receives 24 hours of sunlight during the Summer Solstice)
Q: During the Winter Solstice the Antarctic Circle receives 24 hours of sunlight T/F
a) T (The Arctic Circle during the Winter Solstice receives no sunlight for a 24 hour period)
Q: The latitude at 23 degrees S. is called the _________
a) The Tropic of Capricorn
Q: When it is Winter in the Southern Hemisphere it is _________ in the Northern Hemisphere
Q: According to the text, Stonehenge was likely created for the purpose of
a) Determining when the shortest day of the year would arrive
Q: Along the equator local residents judge the seasons by the __________ rather than the amount of sunlight they receive.
a) the amount of rain
Q: Seasons are more pronounced along the equator T/F
Q: Seasons along the equator are less pronounced T/F
Q: Each year there are how many months of sunshine at each pole
Q: The atmospheric effect of reflection allows us to see a little way over the horizon T/F
Q: The atmospheric effect of refraction allows us to see a little way over the horizon T/F
Q: What is the name of the atmospheric effect that allows us to see a little way over the horizon
Q: Where on the planet is the effect of atmospheric refraction most dramatic
a) At the North and South Poles
Q: June 21st, the Summer Solstice is the hottest day of the Year T/F
Q: June 21st, the Summer Solstice is not the hottest day of the year T/F