Unit 5 - Space

Front

What unit of measurement is used to calculate distance in our universe?

Back

Light years are used to measure astronomical distances, representing the distance light travels in one year.

Front

What type of galaxy is characterized by a smooth, featureless light profile and an ellipsoidal shape?

Back

Elliptical galaxies are characterized by their smooth, featureless light profiles and ellipsoidal shapes.

Front

What is the name of the largest type of stars in the universe?

Back

Supergiants are the largest stars, significantly larger than the Sun.

Front

Why can the apparent magnitude of a star be misleading?

Back

The apparent magnitude can be misleading because it may not reflect true brightness; a star may appear bright simply because it is closer to Earth.

Front

What is the relationship between a planet's mass and its gravitational force?

Back

The greater the mass of a planet, the greater the gravitational force it exerts.

Front

What is the definition of an astronomical unit (AU)?

Back

An astronomical unit (AU) is the average distance from the Earth to the Sun, approximately 93 million miles or 150 million kilometers.

Front

What are the three main types of galaxies?

Back

The three main types of galaxies are spiral, elliptical, and irregular.

Front

What is a protostar?

Back

A protostar is a young star that is still in the process of forming and has not yet reached the main sequence stage.

Front

What is the difference between a red giant and a supergiant star?

Back

Red giants are large stars that have expanded and cooled, while supergiants are even larger and more luminous than red giants.

Front

What does the term 'light year' mean?

Back

A light year is a unit of distance that represents how far light travels in one year.