Astronomy Unit

Rotation is the motion of:

• Sun's gravity

• Earth spinning around the Moon

• Earth spinning around the Sun

• Earth spinning on its axis

Ultraviolet, Infrared, & visible light are examples of __________ being emitted by our Sun.

• radiation
• gamma rays
• gravity

Which of the following is true about nuclear fusion?

• Occurs at the center of stars & produces energy
• Occurs in the process of chemical reactions
• Results in the creation of black holes
• Occurs when 2 stars collide 

Planets closer to the sun have a ___________ gravitational attraction along with a ___________ revolution speed when compared to outer planets. 

• weaker, slower
• weaker, faster
• stronger, faster
• stronger, slower

Our universe is constantly __________________ because galaxies are moving ______________ each other.

• shrinking, towards
• rotating, around
• growing, away from

An object spins on its axis

• rotation

• revolution

• revive

• orbit

Revolution

• An object is tilted

• An object spins on its axis

• An object orbits or goes around another object

• An object is celestial

Which motion of the Earth causes day and night?

• orbit

• revolution

• rotation

• tilt

What causes the seasons?

• the Earth's axis is tilted and it revolves around the sun.

• the Earth spins

• the Earth gets far away from the sun

• the Earth gets closer to the sun

If the northern hemisphere is having winter than what is the season in the southern hemisphere?

• spring

• winter

• summer

• fall