Unit Test — Unit test Answers

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Which object(s) formed last in our solar system?

the Sun

the solar nebula

the inner planets

the planetesimals

What are the two main types of star clusters?

binary and wobbling

eclipsing and binary

globular and eclipsing

open and globular

Which event occurs during high tide?

All of Earth’s ocean levels rise.

The moon’s orbit is closer to Earth.

The gravity of the Sun and moon cause the Earth’s crust and water to bulge.

Earth’s crust and water are being pulled in opposite directions by the Sun and moon.

Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?

elliptical

irregular

barred spiral

normal spiral

How was Aristotle’s model similar to Ptolemy’s model?

Both models stated that the planets rotate on their axes.

Both models stated that Earth is the center of the system around which other objects orbit.

Both models stated that the planets and objects in the solar system have small orbits called epicycles.

Both models stated that the Sun is the center of the system around which objects have elliptical orbits.

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