Science Multiple Choice Test

Characteristics used to classify stars include:

The _______________ of visible light is made of the colors red, orange, yellow, green, blue and violet.

The ___________includes radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

This is how scientist call the light you can see:_____________.

The brightness of a star depends on:____________.

Astronomers often use ___________ to measure distances to nearby stars.

It is born when the contracting gas and dust from a nebula becomes so dense and hot that nuclear fusion starts._____________.

Astronomers use it to describe sizes and distances in the universe, when numbers are too long or too short:

The distance between the crest of one wave, and the crest of the next wave is called:___________.

________collect and focus light and other forms of electromagnetic radiation.

According to this theory, the Universe formed in an instant, billions of years ago, in an enormous explosion.

They use a unit called the _____________ to measure distances between stars.

Scientist use _________ to classify stars.

Most stars are members of groups of two or more stars, called:_____________.

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