How is the Water Level Changing?

NGSS Phenomena:
Use the images below to answer the questions:
NGSS Phenomena: An image of the ocean with arrows coming up and away from the water.
NGSS Phenomena: An image of a beach with no water, and arrows curving and pointing down and to the left

1. What are 2 of the limitations to the arrows on this model as a way to explain how gravity works to change the levels of water?

2. One of your classmates uses this diagram to explain how gravity works to push the water away from the shore.



She says, “In the first picture, the Moon is on a different side of the Earth. The water doesn’t have the gravity from the moon pressing it down, so the water is higher up. In the second image, the moon is overhead and its gravity is pushing the water away from the shore.”



Evaluate your classmate’s model and suggest any changes that might make it more accurate.

3. Draw arrows on the below images to show how gravity is affecting the level of water.

Color

Width

4. Draw and label a model that more accurately demonstrates why the water is a different level at different times of the day.

Color

Width

5. Explain how your model shows why the water is at a different level at different times of the day.

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This free response question aligns to the following standards

  • ESS1.B: Earth and the Solar System

  • MS-ESS1-1

  • Developing and Using Models

This free response question aligns to the following standards

  • ESS1.A: The Universe and Its Stars

  • ESS1.B: Earth and the Solar System

  • Developing and Using Models

  • Patterns

  • MS-ESS1-1

This drawing question aligns to the following standards

  • Developing and Using Models

  • Patterns

  • MS-ESS1-1

  • ESS1.B: Earth and the Solar System

This drawing question aligns to the following standards

  • ESS1.A: The Universe and Its Stars

  • ESS1.B: Earth and the Solar System

  • Developing and Using Models

  • Patterns

  • MS-ESS1-1

This free response question aligns to the following standards

  • ESS1.A: The Universe and Its Stars

  • Patterns

  • MS-ESS1-1

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