Astronomy Semester Review

We have to use scale models because Space is

The Earth has seasons because

• of the distance from the sun

• The Earth Rotates

• The Earth is tilted

• The Sun is tilted

The Big Bang Theory...

• Started with an 'explosion'

• Is a good TV show

• Describes the Universe as static

• Describes the timeline and evolution of the universe

Earth's tilt was probably caused by:

• Too many people standing one place

• Another object crashing into Earth

• It formed that way

• The gravitational pull of the Moon

If the Earth wasn't tilted, what would happen to Earth's seasons

• They would be way more intense

• Summer would be when the Earth was closer to the sun

• They would be nonexistent

• Summer would be in December for the Northern Hemisphere now

If The Earth wasn't tilted the seasons wouldn't exist because

• The surface would get the same amount of sunlight every day

• This is a trick question -The seasons would exist

• Some areas of Earth wouldn't get any sunlight

• The Earth would stop spinning

The sun is...

• A ball of fire

• Full of oxygen

• Not that hot

• A Nuclear explosion

The Sun works by Fusing...

• Hydrogen into Helium

• Uranium into Lead

• Carbon into Iron

• Uranium into Neptunium

The energy from the sun comes from...

• Light bouncing around

• The intense pressure created by gravity

• The mass lost during the fusion reaction

• We have no idea

If the proton mass is tiny (1.67 x 10^-27 kg) how is there so much energy produced in the sun

• There is A LOT of protons

• We don't know

• Fusion is a net gain of energy

• The sun is a plasma