Astronomy Part 1

Which evidence best supports the theory that the universe began with a massive explosion?

• cosmic background radiation in space

• parallelism of Earth's axis

• radioactive dating of Earth's bedrock

• life cycle of stars

Which sequence correctly lists the relative sizes from smallest to largest?

• our solar system, universe, Milky Way Galaxy

• our solar system, Milky Way Galaxy, universe

• Milky Way Galaxy, our solar system, universe

• Milky Way Galaxy, universe, our solar system

A blue shift of the light from a star indicates that the star

• will soon become a main sequence star

• will soon become a dwarf star

• is moving closer to Earth

• is moving further away from Earth

The universe is approximately 13.8 billion years old. Compared to the age of the solar system, the age of the universe is approximately

• the same age as the solar system

• 2x older than the solar system

• 3x older than our solar system

• 4x older than our solar system

What does the Red-shift tell us about the universe

• the universe is expanding
• the universe is contracting
• the big bang is false
• nothing