Physics > GIZMOS > Gizmo OceanTides - Students (All)

Gizmo OceanTides - Students

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Name: Dasha Hicks Date: 04/03/21 Student Exploration: Ocean Tides Vocabulary: gravity, high tide, low tide, neap tide, range, spring tide, tides Prior Knowledge Questions (Do these BEF... ORE using the Gizmo.) 1. A boy builds a sand castle near the ocean. When he returns several hours later, the castle is gone. What do you think happened? A high tide came along and wiped the sandcastle away. 2. A boat sails into a bay and drops anchor. Several hours later, it is surrounded by mud. What happened? A low tide occurred. Gizmo Warm-up: What is a tide? In the Gizmo, the pane on the left shows the position of the Earth and Moon. The Sun is far off in space to the left. The person standing on Earth represents the location of the fisherman shown at right. 1. Click Play ( ) and observe the ocean depth for several days. What do you notice? As the days goes by the depth gets higher The rise and fall of water that you see are called tides. 3. Click Play, and then Pause when the water is at its lowest level (low tide). What is the water depth at low tide? It is at 2.8 Activity A: The Moon and tides Get the Gizmo Ready: • Click Reset ( ). Question: What causes the tides? 1. Observe: Click Play and observe for several days. Try to find a connection between the tides shown at right and the position of the observer shown at left. What do you notice? As the observer goes either on the opposite side or the right side next to the moon, the tide gets higher. Other times it starts decreasing until its lowest point is reached. 2. Form a hypothesis: What do you think causes tides? The gravitational pull of the Earth on the sun and on the moon. 3. Observe: Click Play, and Pause the simulation at several consecutive high tides. Each time, look at where the observer on Earth is pointing. Do you see a pattern? What is it? He’s either facing the moon or on the opposite side of the moon. 4. Observe: Observe several low tides. Where does the observer point during the low tides? In the section where it crosses from day to night. 5. Extend: Turn on Show tidal bands. The tidal bands show the depth of water at different places (not to scale). Notice the two bulges that show high tide. Click Fast forward ( ). A. In what directions do the bulges always point? Towards the sun or on the opposite side of the moon. B. How does the Moon seem to affect the tidal bulges? .....................................................................................continued.............................................................................................................. [Show More]

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