1. Tides
Objectives:
Describe the arrangement of the sun, moon, and earth during spring and neap tides.
Provide evidence that supports the claim that the moon’s effect on tides is greater than the sun.
ESSENTIAL QUESTIONS:
Where are the locations of the sun, moon, and earth during a spring and neap tide?

2. What is happening in the above images?

3. What causes Tides?
Tides are the rise and fall of sea levels caused by the Sun and Moon’s gravity acting on the oceans.
There are 2 kinds of special tides:
Spring Tide
Neap tide

4. What Causes Tides?
The Sun and the Moon both influence tides because of their gravity. However, the Moon has TWICE the gravitational pull on our oceans. .

5. Tides Follow the Law! The Law of Universal Gravitation states:
The greater an object’s mass, the greater its gravity (and vice versa)
The greater the distance between two objects, the weaker the gravity is. (and vice versa)

6. Why is the Moon the main cause of tides and not the Sun?
A. The moon orbits around the earth.
B. The Moon is much closer than the Sun, so its gravitation pull is greater.
C. The Sun doesn’t have any effect on our tides.

7. Spring Tides: When the gravity of the Moon and the Sun combine (FULL AND NEW MOON) in order to increase water levels. GREATER difference between high/low tides.
LOW TIDE
HIGH TIDE
EARTH
THE MOON
HIGH TIDE
LOW TIDE

8. Spring Tides
Means to leap up.
Create the greatest difference between the low and high tide.

9. Neap Tides: When the gravity of the Moon and the Sun are at 90°angles (FIRST AND THIRD QUARTER) and work against each other. SMALLER difference between high/low tides.
THE MOON
HIGH TIDE
LOW TIDE
EARTH
LOW TIDE
HIGH TIDE

10. Neap Tides
Create the smallest difference between the low and high tide.

11. 11

12. Check for understanding:
Allyse’s family lives near the beach. Every day there is a high tide and a low tide. Allyse notices that sometimes the high tides are higher and the low tides are lower than they are at other times. She realizes that this happens in a predictable pattern. What causes the highest of high tides and the lowest of low tides to occur?

14. How to interpret Tide Data?
Tidal Range is the difference between the levels of the ocean water at high tide and low tide.
Spring tides have the largest daily tidal range while neap tides have the smallest daily tidal range.

15. How to interpret Tide Data?
Because the earth rotates at a faster pace than the moon’s revolution around the earth, tides occur at different times around the earth.
There are usually 2 high tides and 2 low tides that occur daily.

16. Height
high tide
low tide
Dates

17. Solar and Lunar Eclipse Objective: Describe and illustrate the arrangement of the sun, moon, and earth during both solar and lunar eclipses.
Essential Question: How are the Sun, moon, and earth arranged during a solar and lunar eclipse?

18. Solar
and
Lunar Eclipses

19. Eclipses are named after the object that is blocked out.
What are Eclipses?
An eclipse occurs when one object casts a shadow on another object that is in space.
Eclipses are named after the object that is blocked out.

20. Solar Eclipse
Solar Eclipse: When the Moon casts its shadow on the Earth.
-The Moon is in its New Moon Phase

21. Solar Eclipse:
This is what a Solar Eclipse looks like from SPACE.

22. Solar Eclipse: This is what a Solar Eclipse looks like from EARTH.
Our next solar eclipse: Mon. Aug. 21

23. Lunar Eclipse:
Lunar Eclipse: When the Earth casts its shadow on the Moon.
-The Moon is in its
Full Moon Phase

24. This is what a Lunar Eclipse looks like from EARTH. Next lunar eclipse:

25. You Do Question #1 SKETCH A SOLAR ECLIPSE BEFORE DECIDING ON AN ANSWER
CORRECT ANSWER: A
SKETCH A SOLAR ECLIPSE BEFORE DECIDING ON AN ANSWER

26. You Do Question #2 SKETCH A LUNAR ECLIPSE BEFORE DECIDING ON AN ANSWER
CORRECT ANSWER: C
SKETCH A LUNAR ECLIPSE BEFORE DECIDING ON AN ANSWER

27. You Do Question #3
CORRECT ANSWER: C
SKETCH THE ARRANGEMENT (Sun, Moon, Earth) BEFORE DECIDING ON AN ANSWER