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What is Astronomy?
The science that studies ________________________________________________
Kepler’s Laws
Purpose: Explain the motion of the Earth and how that affects the_________________________________in the past and present
Big Bang Theory:
Kepler’s
Three Laws
Description
First
The _________________of the planets are ellipses, with the ___________________________________ of the ellipse.
Second
A planet moves _____________________ when it is________________
_________________ and ______________ when it is ___________________________________.
Third
relationship between the _____________________ of planets from the Sun, and their ___________ periods.
First Law
Second Law
Third Law
Electromagnetic Radiation: Different waves of __________________________based on wavelengths and frequency
Solar Radiation:
Photosynthesis:
FUSION:
FISSION:
Fusion and Fission
Earth’s Motion
Precession
Tilt on a_____________________ in an elliptical motion
The North Star is not always the ______________________________ of rotation --- MOON
Nutation
Oscillatory (movement of the axis ___________________________________) of a rotating body
Observed during _______________________
Occurs about 18.6 years
Rotation:
1. The turning or spinning of a body on its axis (23.5 degree tilt)
2. Causes ________________ and _____________________
3. Whole process takes _____________________
1. Tidal Currents:
a. Currents generated by tides
b. Gravitational pull of the _______________________
c. ____________________________ at high and low tides
2. Tides:
a. change in elevation (which means?)
b. Based on gravitational forces of the sun and the moon
3. Spring Tides
a. Occur during the ________________________ moons
b. All gravitational forces are __________________together
c. Extreme high and low tides
d. High tidal range
4. Neap Tides
a. During the 1st and 3rd quarters of the Moon
b. Gravitational forces are offset ( or __________________________)
c. Tidal range is the ___________________ value
Barycenter
The center of mass where two or more ________________________________ orbit each other and balance each other out.
Revolution
1. Motion of a body along a path around some point in space.
2. Earth’s orbit is _________________________
3. Earth’s distance from the sun varies
What causes seasons?
1. Seasons are caused by the ____________________________________ on its axis
2. Focusing on the Northern Hemisphere:
a. When the hemisphere is tilted ________________ the sun that determines a ________________________ season
b. When the hemisphere is tilted ____________________ the sun that determines a ____________________ season
**Equator: this imaginary line denotes the warmest weather because it is directly hit by the sun due to the tilt**
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