MP3 Unit 3 Science: Star Brightness & Distance

Front

What is a star?

Back

A star is a massive, luminous sphere of plasma held together by gravity, which produces light and heat through nuclear fusion.

Front

True or False: The Moon is a star.

Back

False

Front

What happens to the brightness of a star as distance decreases?

Back

The star appears more bright.

Front

How can you determine the distance of a star from where you are located on Earth?

Back

By observing its brightness.

Front

True or False: The Sun is a star.

Back

True

Front

True or False: Stars of different sizes can give off the same amount of light/brightness.

Back

False

Front

What is brightness in terms of stars?

Back

Brightness refers to the amount of light a star emits, which can be affected by its distance from Earth.

Front

What is the relationship between distance and brightness of stars?

Back

As the distance from a star increases, its brightness appears to decrease.

Front

What is the main source of a star's energy?

Back

Nuclear fusion, where hydrogen atoms combine to form helium, releasing energy.

Front

What is the difference between a star and a planet?

Back

A star produces its own light through nuclear fusion, while a planet reflects light from a star.