The Seasons

How does the Earth move in relation to sun?

• Earth spins on axis
• One rotation=24 hours
• Day has sun, night has no sun
• Earth also revolves around sun
• One loop=356 days

What causes seasonal patterns?

• Tilt of Earth
• Hemispheres have opposite seasons

The sun's path is predictable/unpredictable

• Sun rises in east, sets in west
• Depending on the season the sun's path changes
• Depending where you are on Earth sun's path changes

Diff. Constellations are visible diff. times

• Patterns in the night sky
• Depending on the season different stars visible

Summary

• Rotation=24 hours
• Revolution=356 days
• Day and night b/c of rotation
• Seasons b/c of revolution AND tilt
• Opposite seasons for hemispheres
• Different constellations depending on season