Science

9th

grade

Image

Universe

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  • 1. Multiple Choice
    30 seconds
    1 pt

    When we see the Andromeda galaxy, we are seeing it as it was 2.3 million years ago. Why?

    it takes light that length of time to travel

    light travels really slow in outer space

    light travels faster than sound

    it is an ancient galaxy

  • 2. Multiple Choice
    30 seconds
    1 pt

    Which does the existance of cosmic background radiation support?

    the Big Bang Theory

    the inflationary model

    critical density

    Hubble constant

  • 3. Multiple Choice
    30 seconds
    1 pt

    which would cause the universe to collapse in on itself to make a closed universe?

    momentum of outward expanision

    force of gravity

    critical density

    Hubble constant

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