Unit 8 key terms - Astrophysics

What are artificial satellites used for?

• Observing wildlife

• Satellite imaging and communications

• Growing plants in space

• Mining asteroids

What does the Big Bang Theory suggest about the universe?

• It is shrinking

• It has always been the same size

• It has expanded from a very small, hot, and dense point

• It is flat

What is the nature of circular orbits?

• They are elliptical

• They are square

• They are triangular

• They are circular

What does CMBR stand for?

• Cosmic Microwave Background Radiation

• Cosmic Magnetic Background Radiation

• Cosmic Microwave Backward Radiation

• Cosmic Magnetic Backward Radiation

What are comets primarily made of?

• Metal and gas

• Rock, dust, and ice

• Water and air

• Fire and smoke

What does the Doppler Effect describe?

• Change in temperature

• Change in wave's observed wavelength and frequency

• Change in color

• Change in size

What is a galaxy?

• A single star

• A system containing billions of stars

• A planet

• A moon

What does the Hertzsprung-Russell Diagram plot?

• Distance of stars

• Luminosity of stars against their temperatures

• Size of stars

• Age of stars

What is a main sequence star?

• A dying star

• A newly formed star

• The stable state of all stars

• A star about to explode

Where is the Milky Way Galaxy located?

• In another universe

• In a black hole

• Where our solar system is located

• In a parallel dimension