Earth and Enviro Science Review-Lizzy

Day and Night (24 Hrs)

• Revolution
• Rotation
• Barycenter
• Universe

A Year (365 Days)

• Revolution
• Nutation
• Planet
• Prescssion

Change in direction of the axis, but without any change in tilt-this changes the stars near (or not near) the Pole

• Tide
• Season
• Precession
• Change

Wobbling around the axis (This occurs over an 18 year period)

• Barycenter
• Rotation
• 18 year axis plan
• Nutation

The center of mass where two or more celestial bodies orbit each other(This is the point about which the Earth and Moon orbit as they travel around the sun.) 

• Barycenter
• Dating
• Expanding 
• Precession

FIll in the blanks-
______ is made of _____ which are made of many _____. Some stars have planetary systems similar to our _____ ______. Earth is a ____ of one particular star.

• Galaxy,stars,solar system,planet,universe
• Universe,galaxy,stars,solar system,planet

The universe is _____ after the Big Bang.

• Expanding
• Contracting

Kepler discovered that the path of each planet around the sun is an ellipse

• True
• False

The universe is made of galaxies, galaxies contain stars, stars may have planetary systems. 

• True
• False

Kepler's Laws
The line joining the planet to the Sun sweeps out equal areas in equal times as the planet travels around the ellipse. 

• 1st Law
• 2nd Law
• 3rd Law