1. The Earth’s Tides
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2. What effect does the moon have on Earth?
Tides-
rise and fall of water levels due to gravitational forces
Occur twice a day (2 high tides, 2 low tides)

3. high tide
low tide

6. How are Tides created? (3 ways)
1. Because the Earth and the moon are attracted to each other

7. Moon and earth are attracted to each other by gravity

8. Tides are also created by:
2. the rotation of the earth,
3. and the sun’s gravity

9. The sun can raise the tides, too
Spring Tides

10. Tides are not waves!

11. What are Spring tides?
Tides that produce the greatest difference between high and low tides—The biggest tides
Occur twice a month

12. When do spring tides occur?
Once at the full moon and once at the new moon
When the sun moon and earth are nearly in a line
Spring Tides combined with big storms

13. The sun can raise the tides, too
Spring Tides –the sun and the moon line up

14. What are NEAP Tides?
Tides that produce the least difference between high and low tides—The smallest tides
Occur twice a month

15. When do neap tides occur?
Once at the first quarter and once at the third quarter
When the sun moon and earth are at right angles to each other

17. The neap tides –the smallest tides –when the sun and moon are at a 90 angle

18. What other effects do we have from the moon??