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Evidence for Revolution Jeopardy Evidence for Revolution The Seasons Apparent Motions Everything Moon! Kepler’s Laws WILD!!! 100 100 100 100 100 100 200 200 200 200 200 200 300 300 300 300 300 300 400 400 400 400 400 400 500 500 500 500 500 500
Name Kepler’s First Law of Planetary Motion
Law of Ellipses A 100
What is the eccentricity of an ellipse that has the following dimensions? Distance between foci = 5 cm Length of Major axis = 26cm A 200
E = d/L E = 5cm/26cm = .192 A 200
Name the term used to describe Earth when it is closest to the sun.
Perihelion A 300
Name and describe Kepler’s Second Law of Planetary Motion
Law of Equal Areas - Equal areas are swept in equal amounts of time when an object orbits the sun A 400
Explain how the kinetic and potential energy of a celestial object varies as it revolves round the sun. Use the terms: perihelion, aphelion, gravity, and velocity in your explanation A 500
Perihelion: Kinetic energy highest, potential lowest As a celestial object (comet, planet, asteroid) approaches perihelion the effect of gravity rises, causing velocity to increase, therefore transforming the object’s potential energy to kinetic. Perihelion: Kinetic energy highest, potential lowest Aphelion: Potential highest, Kinetic lowest A 500
Name one piece of evidence that supports Earth’s revolution. B 100
Seasons, Parallax, Constellations, Doppler Effect, Apparent Diameter B 100
Answer the following in the form of a question! B 200
A group of stars that form a pattern in the night sky that are used to locate celestial objects
Explain how the changing diameter of the sun supports the theory that Earth revolves. B 300
The sun’s actual diameter does not change in a cyclic manner The sun’s actual diameter does not change in a cyclic manner. When the sun appears larger we are closer (perihelion) and when the sun appears smaller Earth is farther (aphelion). This change in apparent diameter would not occur if we were not moving! B 300
Please explain what would happen to Earth if it did not revolve. B 400
One perpetual season all year long! No change of season One perpetual season all year long! B 400
Explain how an astronomer can determine the distance a star is away from Earth by using parallax.
The larger the parallax shift, the closer a star is away from Earth. B 500
What causes the seasons to change?
Earth tilted axis (23.5o) Earth’s revolution C 100
What latitude is the sun directly overhead on June 21st?
Tropic of Cancer C 200
On what date will there be 24 hours of darkness at the South Pole? C 300
June 21st :The Summer Solstice
DAILY DOUBLE DAILY DOUBLE Place A Wager C 400
How many hours of daylight will Oslo, Norway have on March 21st?
12! Every location on Earth experiences 12 hours of daylight and darkness on the Equinox!
Four celestial spheres, A, B, C, and D, are depicted above Four celestial spheres, A, B, C, and D, are depicted above. Each sphere represents a different location. Which sphere depicts the apparent motion of the sun on June 21st in New Zealand? Please explain. C 500
Location D The noontime sun is located in the northern sky. In the southern hemisphere an observer would have to look north to see the noontime sun. C 500
How does the length of the sun’s arc across the sky relate to the length of day?
Longer the arc, the longer the day!
What direction would a person have to face to the see the noontime sun in NYS?
South! D 200
Answer the following in the form of a question! D 300
Stars that complete one full circle about Polaris in 24 hours. D 300
What does the term ‘planet’ actually mean?
Wanderer D 400
How did the ancient Babylonian civilization properly sequence the planets?
Period of Retrograde Motion
What shape do celestial objects make across the sky?
Arcs! E 100
At what rate do stars move across the celestial sphere?
15 degrees per hr E 200
Why do planets sometimes appear to move backwards in relation to the background stars?
Retrograde motion is caused by planets passing one another Retrograde motion is caused by planets passing one another. For example, as Earth catches up and passes by Mars, Mars appears to move backwards. E 300
Betelguese rises in the east at 6:00pm and reaches its highest point in the sky at 1:00am. How many degrees has the star travelled? E 400
7 hrs x 15o/hr = 105o E 400
The celestial hemisphere above represents a particular location on Earth. Where is this person located? E 500
Polaris is directly overhead! The North Pole! 90o N Polaris is directly overhead! E 500
Name the hypothesis that explains the origin of the moon.
The Giant Impact Hypothesis F 100
How many days does it take the moon to complete one full revolution around Earth?
Sidereal Month = 27.3 Days F 200
Name the phase! F 300
F 300
How many days does it take the moon to go from lunar phase #1 to lunar phase #2?
#1 Full moon #2 Waning Gibbous 3.6 Days! F 400
Why does it take the moon longer to complete a synodic month than a sidereal month? F 500
Throughout the year, the Earth is revolving around the sun Throughout the year, the Earth is revolving around the sun. After the completion of one full revolution around the Earth (sidereal month), the moon needs to revolve slightly further to realign with the Earth and sun. This time lag results in a difference of 2.2 days. F 500
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