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Cassandra is giving a class presentation that involves a demonstration where she sprinkles some glitter into a small shallow dish of water and circularly swirls the water around with her finger. When she removes her finger, she asks her classmates to notice how the glitter moves around like a whirlpool, spiraling around the spot where she had removed your finger. What is Cassandra modeling with this demonstration?


how two galaxies collide


how the Milky Way galaxy appears


how the arms in a galaxy interact


how the nuclear bulge of a galaxy moves

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Answer: how the Milky Way galaxy appears

Explanation:

The Milky Way galaxy of which earth is a part of, is a spiral galaxy. This means that it appears as if it is a disk where the various components such as the stars, plants, gas and dust rotate around a central concentration of stars in the middle called the bulge.

This is what Cassandra was modelling. The glitter depicts the stars, gas and dust and the spot where she removed her finger is the bulge.

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