Phsc 121 exam questions Study guides, Class notes & Summaries

PHSC 121 Exam 3 (HW 8-10) Liberty University Exam Questions All Correctly Answered The earth's axis of rotation is tilted 23.5 degrees relative to the ecliptic - Answer -We have seasons because (text p 32-33) the Sun is now crossing the equator into the northern hemisphere and the northern hemisphere begins to face toward the Sun. - Answer -Which of the following is true of the vernal equinox? Sun is now crossing the equator into the northern hemisphere and the northern hemisphere beg...

PHSC 121 Exam Questions with All Correct Answers Why are most of the constellations that were invented in modern times composed of faint stars or located in the southern sky? - Answer-Faint stars or stars in the southern sky were not visible to early astronomers observing from northern latitudes How does the Greek letter designation of a star give you clues both to its location and its apparent brightness? - Answer-The brightest star in a constellation is usually designated as Alpha, the ...

PHSC 121 Exam Questions All Correctly Answered Why are most of the constellations that were invented in modern times composed of faint stars or located in the southern sky? - Answer -Faint stars or stars in the southern sky were not visible to early astronomers observing from northern latitudes How does the Greek letter designation of a star give you clues both to its location and its apparent brightness? - Answer -The brightest star in a constellation is usually designated as Alpha, the s...

PHSC 121 FINAL EXAM QUESTIONS AND ANSWERS GRADED A+ Which ancient culture/country not only kept detailed astronomical records, but also seems to have recorded the story of creation and early man in its very language? - Answer-China Which of these reasons describes why astronomy has been practiced throughout history? - Answer-to understand major world events, to understand weather/climate What is the universe? - Answer-Everything physical that existed Given the size of the univers...

PHSC 121 Liberty University Exam 3 Questions with All Correct 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...

PHSC 121 Homeworks (1-4) 1st Exam Questions All Correctly Answered Astronomy is the study of ___________________. a. the Solar System b. galaxies c. the entire universe d. the planets of the Solar System - Answer -c. the entire universe Which of the following is not a step in the scientific method? a. evaluate science opinion b. refine hypothesis, develop theory c. evaluate data d. draw new conclusions from experimental data and observations - Answer -a. evaluate science opinio...

PHSC 121 Exam 3 Questions And Correct Answers We have seasons because... a. The earth's axis of rotation is tilted 23.5 degrees relative to the ecliptic b. the earth's axis faces the north pole toward the sun when the earth is closest to the sun, in Jan. c. The earth-sun distance decreases to a min in July - Answer -a Which is true of the vernal equinox? a. latitudes south of the Antarctic Circle see no sun for 24 hours b. The Sun is now crossing the equator into the north hemis...

PHSC 121 Hw 8 Exam Questions with Correct Answers A black hole is - Answer-b. 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-a. collapsing stars b. concentrated mass at the center of galaxies Black holes are theorized to be - Answer-b. at the center of galaxies c. at the center of quasars A quasar is - Answer-c. a large remote energy source which may contain a black ho...