Practice Review for Stars

All stars begin their life in a

• Main Sequence

• Nebula

• Protostar

• Black Dwarf

Most stars are made of which elements?

• Hydrogen only

• Hydrogen and Lithium

• Hydrogen and Sodium

• Hydrogen and Helium

Which might change, depending on the DISTANCE to a star?

• Absolute Brightness

• Apparent Magnitude

If a scientist needs to calculate the luminosity of a star, what information would they need?

• Distance

• Apparent Magnitude

• Temperature

• Distance and Apparent Magnitude

What two quantitative measurements do we use to measure absolute brightness?

• Temperature and Color

• Color and Mass

• Temperature and Mass

Which Star is the HOTTEST?

• Blue

• Red

• Orange

• Yellow

Which Star is the COOLEST?

• Blue

• Red

• Orange

• Yellow

What holds a galaxy together?

• pressure

• glue

• gravity

• planets

The classification of Galaxy is based on its observable characteristics. Which of these characteristics is used to classify galaxies?

• shape

• temperature

• types of forces

• chemical elements

What color are the hottest stars?

• red
• yellow
• orange
• blue