3. The Earth’s axis is tilted to 23.5 degrees

5. The Earth’s axis is tilted at 23.5
Seasons
The Earth’s axis is tilted at 23.5

7. This tilt causes the energy from the sun to hit Earth at different angles throughout the year.
The Result? SEASONS!

8. Solstice
Two days of the year on which the noon sun is directly overhead at either 23.5 North or South latitude
Around June 21st, the Sun is at 23.5 North. This marks the summer solstice for the Northern hemisphere and winter solstice for the Southern hemisphere.
Around December 21st, the Sun is at 23.5  South. This marks the winter solstice for the Northern hemisphere & summer solstice for the Southern hemisphere

9. Seasons Summer: When a hemisphere is tilted toward the sun
Winter: When a
hemisphere is tilted
away from the sun

10. Equinox Means equal day and equal night
During equinox, sun is directly over the
equator at noon
Vernal (spring) equinox - Occurs around
March 21, marks the beginning of spring.
Autumnal (fall) equinox – Occurs around
Sept 21 marking the beginning of fall.

12. The Sun’s path through the sky
Summer Solstice
June 21
Sun is at its highest angle in the sky, longest amount of daylight
Winter Solstice December 21
Sun is at its lowest angle in the sky, shortest amount of daylight

17. At your request, a study guide…
Know phases of the moon
Know how long it takes the moon to orbit the Earth,
Know how length of moon phase cycle (from new moon to new moon)
Know what causes the seasons on Earth
Know when solstices and equinoxes occur
Know Sun-Earth-Moon alignment for each season and tide
Know what eclipses are, how they occur
Know what causes tides
Know the 4 steps in a tidal cycle
Know what spring and neap tides are and when they occur
Know how to read and interpret a tide cycle graph (see below)

18. Spring Neap Spring Tides Tides Tides Spring tides Neap tides
Occur during full or new moon phase
Neap tides
Occur during first or third quarter moon phase
Spring tides
Occur during full or new moon phase
New Moon
1st Quarter
Full Moon
High tide
3rd Quarter
New Moon
Full Moon
Spring
Tides
Neap
Tides
Spring
Tides
Low tide