The Universe, Galaxies, and Earth Science Worksheet

What type of electromagnetic wave do astronomers suggest is best for communication between civilizations?

• Radio waves

• Gamma rays

• Ultraviolet waves

• Infrared waves

Why do galaxies show redshift as the universe expands?

• Because space is expanding, stretching the light waves and shifting them toward the red end of the spectrum.

• Because galaxies are moving closer together, compressing the light waves and shifting them toward the blue end of the spectrum.

• Because the light from galaxies is being absorbed by interstellar dust, making it appear redder.

• Because the gravitational pull of black holes in galaxies changes the color of the light to red.

What is one major piece of evidence for the Big Bang?

• Cosmic Microwave Background Radiation

• Solar Flares

• Sunspots

• Asteroid Belts

Tags

NGSS.HS-ESS1-2

What phenomenon shows that space itself can be curved or warped?

• Gravitational lensing

• Electromagnetic induction

• Thermal expansion

• Nuclear fission

Tags

NGSS.HS-PS2-4

What does it mean when galaxy groups are distributed isotropically?

• They are evenly spread in all directions.

• They are only found in spiral galaxies.

• They are clustered around black holes.

• They are aligned along the Milky Way.

To map galaxy clusters, what two pieces of information do astronomers need?

• Distance and direction

• Temperature and color

• Mass and brightness

• Age and composition

Where have astronomers not found evidence of dark matter?

• In the Solar System

• In galaxy clusters

• In the outer regions of galaxies

• In the universe at large

Which type of galaxy contains mostly older stars?

• Elliptical galaxy

• Spiral galaxy

• Irregular galaxy

• Lenticular galaxy

True or False: To verify if a hypothesis in astronomy is reasonable, it must be It must be testable and agree with observations.

• True

• False

What is one Astronomical Unit (AU)?

• The average distance from Earth to the Sun (about 93 million miles or 150 million km)

• The distance from Earth to the Moon

• The distance from the Sun to Pluto

• The diameter of the Earth

Tags

NGSS.MS-ESS1-3