Unit Test: Astronomy

Front

What prevents stars from collapsing under the force of gravity?

Back

Stars remain stable due to the balance between gravitational force and the outward pressure from nuclear fusion.

Front

What happens to summer and winter temperatures if Earth's axis tilt increases from 23.5° to 30°?

Back

The summers would become warmer and the winters would become cooler.

Front

What is the average distance of Comet Barnard from its star?

Back

4.825 AU.

Front

Does Comet Barnard orbit in the habitable zone for the star Barnard?

Back

Yes, Comet Barnard does orbit within the habitable range.

Front

What is the average distance of Barnard b from its star?

Back

0.02294 AU.

Front

Does Barnard b orbit in the habitable zone for the star Barnard?

Back

No, Barnard b does not orbit within the habitable zone.

Front

What does the Big Bang theory state about the universe's beginning?

Back

The universe began with a rapid expansion.

Front

What is gravitational force?

Back

The force that attracts two bodies towards each other, proportional to their masses.

Front

What is nuclear fusion?

Back

The process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is Kepler's First Law of Planetary Motion?

Back

Planets move in elliptical orbits with the sun at one focus.