Sci 8 Stars & Universe HW #2

The four inner planets are...

• Rocky and small
• Very large and made of ice
• Small and made of ice
• Very large and made of gases

The outer planets are...

• Rocky and small
• Very large and made of ice
• Small and made of ice
• Very large and made of gases

Which two planets are out of order in this list of our solar system?
Mercury-Earth-Venus-Mars-Jupiter-Saturn-Uranus-Neptune-Pluto.

• Mercury and Earth
• Earth and Venus
• Saturn and Jupiter
• Uranus and Neptune

What holds the planets in their orbits around the sun?

• gravity
• speed
• string
• air currents

Which object has the most gravity?

• Earth
• moon
• Jupiter
• sun

What is the color of the coolest stars?

• blue
• Yellow
• Red
• Orange

What color are the hottest stars?

• red
• yellow
• orange
• blue

As our sun continues through its life cycle, it will _________ and turn into a _______________.

• gradually get smaller and smaller until it dies out/ black hole

• Gradually get larger until its outer layers drift off/ white dwarf

• become denser and denser/ protostar

• become hotter and hotter blue/ hypergiant.

All stars begin their life in a

• Main Sequence

• Nebula

• Protostar

• Black Dwarf

A gigantic explosion that causes the death of a large star is called

• pulsar
• red giant 
• supernova
• black hole