1. Review:
T I D E S
SEASONS
MOON PHASES

2. WHY DO WE HAVE TWO (2) HIGH TIDES AND TWO (2) LOW TIDES EACH DAY?
The Hopewell Rocks in New Brunswick, Canada
WHY DO WE HAVE TWO (2) HIGH TIDES AND TWO (2) LOW TIDES EACH DAY?

3. gravity of the moon and … two High Tides and two Low Tides
gravity of the sun
Tides are caused by the
gravity of the moon and …
What causes tides?
Generally occurs
twice a day
two High Tides and two Low Tides

8. CHALLENGE QUESTION: 2/27/15
WHY DO WE HAVE TWO (2) HIGH TIDES AND TWO (2) LOW TIDES EACH DAY?
EARTH AND MOON
CONSTANT MOVING –
CONSTANT MOVEMENT
RESULTS IN CHANGE OF TIDES
HIGH LOW
NEAP (90)
SPRING (180)

9. review

10. The Earth’s axis is tilted 23.50 from vertical.
The axis always points in the same direction in space.

11. Earth rotating = day and night (24 hrs)
Earth orbiting (revolving) = seasons (365 days = 1 year)

12. Shortest day of the year
Direct
Indirect
Summer Solstice
June 21
First day of Summer
Longest day of the year
Winter Solstice
December 21
First day of Winter
Shortest day of the year
Axis tilted toward Sun
Summer for 3 months
Direct sunlight
Longer days; shorter nights
Warmer temperatures
Axis tilted away from Sun
Winter for 3 months
Indirect sunlight
Shorter days; longer nights
Cooler temperatures

13. Axis is parallel to the sun
Vernal Equinox
March 20
First day of Spring
Autumnal Equinox
September 22
First day of Fall
Axis is parallel to the sun
Both hemispheres get equal amount of sunlight

14. December 21 Winter Solstice
March 21
Vernal Equinox
December 21 Winter Solstice
Spins (rotates to the East)
June 21
Summer Solstice
September 21
Autumnal Equinox

15. M O O N
P H A S E S

16. S N E F 28 DAYS ABOUT A MONTH C O D WAXING 3RD QUARTER WANING GIBBOUS
WANING CRESCENT S N E F O
NEW MOON
FULL MOON
WAXING GIBBOUS
WAXING
1ST QUARTER D
WAXING CRESCENT