Phsc 121 Study guides, Class notes & Summaries

PHSC 121 Exam 3 with A Grade Solutions 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 hemisphere and...

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 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 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 Homework (5-7) 2nd Exam With Complete Solutions 2024. We see the same side of the Moon always because ______________ . a. the Moon reflects sunlight to the Earth only from one direction because the Moon's angle toward the Earth and Sun never changes b. the Moon rotates with the same period (about 4 weeks) as its period of revolution around the Earth c. the Moon faces the Sun with one side only and that is what we see d. the Moon does not rotate e. the Earth always faces th...

PHSC 121 Test 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. Which of the following is NOT true of the winter solstice? - Answer-the northern hemisphere receives the most direct sunlight of the year ...

PHSC 121 Homework (1-4) 1st Exam Practice Questions With Correct Answers 2024. Astronomy is the study of ___________________. a. the Solar System b. galaxies c. the entire universe d. the planets of the Solar System - CORRECT 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 - CORRECT ANSWE...

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...

PHSC 121 Final Exam with Complete Solutions Graded A+ 4 points of the scientific method - Answer-observation, testing, assumption, hypothesis Our solar system consists of ______ and has ___ major planets - Answer-the Sun and all the objects that orbit the Sun / 8 Why isn't Pluto considered a planet? - Answer-It does not dominate its orbit Light from the Sun takes ___ to reach Earth - Answer-8 minutess The Kuiper Belt is located __________________ - Answer-beyond the orbit of Nept...

PHSC 121 Test 2 Questions with All Correct Answers What is the Synodic period? - Answer-Time it takes the moon to orbit though its phases. It last 29.5 days. What is the sidereal period? - Answer-Time it takes the moon to orbit the earth with respect to the stars. It last 27.3 days Synodal and sidereal period for the moon - Answer-The moons synodal day is longer than the sidereal day because the moon has to catch up to the earth motion around the sun. What is earthshine? - Answer-Th...