Astronomy Review Lessons 1-4

Which stars are the hottest?

• blue

• red

• yellow

• orange

What are stars made out of?

• 75 % Hydrogen, 25 % Helium

• 75 % Helium, 25 % Hydrogen

• 100 % Brightness

• 50% Helium, 50% Hydrogen

Pick the choice that best describes our sun.

• Yellow, average in temperature

• Red, low in temperature

• Blue, hot in temperature

• None of these choices are correct.

What is a light-year?

• That distance that light travels in one year.

• The distance that life travels in one day.

• The distance light travels in one lifetime.

What is the closest star to Earth?

• Polaris

• Alpha Centauri

• The Sun

What determines the lifespan of a star?

• Mass

• Color

• Temperature

• Distance from Earth

What is a nebula?

• Immense mass of gas and dust

• Lifecycle of a star

• Black Hole

• Red Super Giant

What is the lifecycle of an average star?

• nebula --> average star --> red giant --> white dwarf

• nebula --> massive star --> red super giant --> black hole or neutron star/pulsar

What is the lifecycle of a massive star?

• nebula --> average star --> red giant --> white dwarf

• nebula --> massive star --> red super giant --> black hole or neutron star/pulsar

What do we call a star with many orbiting planets?

• Solar System

• Neutron Star

• Massive Star

• Asteroid Belt