Stars and Galaxies: What Are Stars?

Stars and Galaxies: What Are Stars?

Assessment

Interactive Video

Science, Physics

10th - 12th Grade

Hard

Created by

Quizizz Content

FREE Resource

The video tutorial explains that the Sun is the closest star to Earth and is central to our solar system. It appears brighter and larger due to its proximity. The Sun, like other stars, is a hot ball of gases and plasma, emitting heat and light energy through chemical reactions. Astronomers study stars by analyzing their light energy. Distances in space are measured in kilometers for nearby objects and light-years for distant ones. Light travels at 310,000 km/s, covering 9.5 trillion km in a year. Proxima Centauri, the closest star beyond the Sun, is 4.3 light-years away, while Rigel is 910 light-years away, meaning its light takes 910 years to reach Earth.

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2 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

How far is Proxima Centauri from Earth in light years?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

What does it mean when we say that the light we see from Rigel left it 910 years ago?

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