Unit 1: Universe

The study of the universe is called ____________.

• astronomy

• astrology

• silly

• gravity

A light-year measures __________.

• distance

• time

• light

• heat

The force most responsible for holding a galaxy together is ____________.

• expansion

• oxygen

• gravity

• universe

Galaxies can be classified as what shapes?

• elliptical, spiral, flat

• spiral, irregular, crescent

• square, irregular, round

• spiral, elliptical, irregular

The Earth is NOT directly part of a system with ________.

• its moon

• its galaxy

• a black hole

• other planets

The astronomical unit is based on ____________________.

• the average distance between the Earth and the sun

• the distance light travels in one year

• how far an astronomer can see with a telescope

• how many planets astronauts have been to

Which system is in the correct order from LARGEST to SMALLEST?

• Galaxy, Universe, Supercluster, Cluster, Star

• Star, Galaxy, Cluster, Supercluster, Galaxy, Universe

• Universe, Supercluster, Cluster, Galaxy, Star

• Supercluster, Universe, Cluster, Galaxy, Star

Astronomical units are used to measure _____________.

• long distances within our solar system

• the time it takes for light to travel to Earth

• distance between galaxies

• the temperature of the sun

A huge collection of stars, gasses, and dust clouds is called a _________.

• universe

• supercluster

• galaxy

• astronomical unit

What is the correct order of the planets, starting at the sun?

• Mars, Mercury, Earth, Venus, Uranus, Neptune, Saturn, Jupiter

• Neptune, Uranus, Saturn, Jupiter Mars, Earth, Venus, Mercury

• Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune