Unit 3 Universe 2022

Copernicus had a ___________ worldview. He had evidence that the ______ was the center of the universe

• Heliocentric; Earth
• Geocentric; Sun
• Geocentric; Earth
• Heliocentric; Sun

Scientists measure the distance to stars by noticing a shift when view from two different locations. This is called parallax, and it works best for stars that are _____________

• Far away
• Hotter
• Colder
• Closer

The distance from the sun to Earth is

• 1 AU
• 8.3 Light-minutes
• 93 million miles
• All of these are correct

Astonomers believe that the sun is over 4.5 billion years old and is in the middle of its life cycle. Based on its mass, it will become __________ when it runs out of fuel

• Blue Giant
• Blue main sequence
• Supernova
• White Dwarf

Our Sun is a _______ star?

• Red Giant
• Blue Giant
• White Dwarf
• Main sequence

The star in the center of our solar system is called

• Proxima Centauri
• Aldebaran
• Sagittarius A*
• Sun

What makes up the universe?

• Stars only
• Some galaxies
• the HR diagram
• Space and all the energy and matter in it

The part of the EM spectrum that we can see is

• Gamma Waves
• Ultraviolet waves
• Microwaves
• Visible light waves

Scientific ideas change over time

• at the same rate every year
• due to information from computers
• silly rabbit, scientific ideas never change
• with new ideas and better technology to observe around us

What would happen to galaxies without graviy?

• They would spin faster
• They would have more black holes
• They would have more stars
• They would fall apart