1. TESTA Presents: Let’s Talk Tides CAST 2014 Presented by Christine Shupla, Jan Grout, Colinda Kelsey, Kim Blain STEP Program: Sustainable Trainer Engagement Program

2. Table Texting Enter the question: “What causes the tides?” and answer it. Enter the question: “What causes the tides?” and answer it. Trade with others and respond to their comments (ex: “Yes, and also…” or “I think that …”) Trade with others and respond to their comments (ex: “Yes, and also…” or “I think that …”) Give back to the original person if possible when at least 2 comments have been added. Give back to the original person if possible when at least 2 comments have been added.

3. Time’s Up Give back to the original person please; we’re moving on to the next activity!

4. Dance of the Moon and Oceans Activity 6 students will model how the Moon’s gravitational pull creates tides. 1 student represents the solid Earth. 4 other students (the oceans) stand in a circle around the "Earth": one behind, two on each side, and one directly in front of "Earth." All 5 students stand to face the sixth student, the “Moon.” Which part of the Earth and ocean is being pulled the most by the Moon? The student closest to the Moon (one of the “oceans”). Which part of the Earth and oceans is being pulled the least by the Moon? The student farthest from the Moon (another “ocean.”)

5. Have the "ocean" student nearest the "Moon" take 3 large steps toward him or her. "Earth" and the two "oceans" standing beside Earth take 2 large steps toward the "Moon." The "ocean" student furthest from the "Moon" takes 1 large step toward the Moon. Why did the oceans move toward the Moon? The Moon's gravity pulled on them. What happened to the oceans? They moved apart around the "Earth" to form an oval rather than a circle shape.

6. Spring and Neap tide Position the Moon to stand between the Earth and Sun. Have the student nearest the Sun and Moon take 3 steps plus 1 large step toward the Moon. “Earth” and the two standing beside him or her take 2 steps plus 1 normal step toward the Sun and Moon. The student furthest from the Sun and Moon takes 1 normal step plus 1 small step forward. What happened to the oceans? The high tides became even higher, and the low tides became even lower. This is called spring tide. What Moon phase do we have modeled here, with the Moon between the Earth and Sun? New Moon.

7. Position the Moon to move ¼ of the way around the Earth Have the "ocean" student nearest the "Moon" take 3 large steps toward the “Moon.” "Earth" and the two "oceans" take 2 large steps toward the "Moon." The "ocean" student furthest from the "Moon" takes 1 large step toward the Moon. Now the “ocean” nearest the Sun takes 1 large step towards the Sun. “Earth” and the two “oceans” take 1 additional normal step toward the Sun. The student furthest from the Sun takes 1 small step toward the Sun. What happened to the oceans? The high tides are not as high, and the low tides are a bit higher. This is called neap tide.

8. How often does the does the coast of Virginia have high tide? A. A. Every hour B. B. Every 12 hours C. C. Every 24 hours D. D. Every week Tides: Think-Pair-Share Assessment Best procedures: read quietly to yourself (so you don’t give any subconscious clues) As the instructor, we read it too, for timing, then ask if anyone needs more time If not, it’s time to vote simultaneously—use colored cards (anonymous)

9. Which lunar phase is likeliest to have the lowest tides? A B C D

10. Tides along a coast are affected by 1. 1. The gravitational pull of the Sun 2. 2. The gravitational pull of the Moon 3. 3. The shape and depth of the ocean floor along the coast A.Only choice 1 B.Only choice 2 C.Both 1 and 2 D.1, 2, and 3

11. Which part of the Earth is likely to have high tides? A B D C