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Science

Yall check my answers please?

1. A spiral galaxy can be described as what type of shape?(1 point)

oval

triangular

no distinct shape

pinwheel***

2. What lies at the center of the Milky Way galaxy?(1 point)

the sun

a black hole***

Earth

North Star

3. How are asteroids and comets similar?(1 point)

Both are frozen.***

Both orbit the sun.

Both are composed of rock.

Both are composed of gases.

4. At certain times of the year, four planets can be seen from Earth, including Mars and(1 point)

Neptune.

Juno.

Saturn.***

Uranus.

5. What caused people to accept the geocentric model of the universe?(1 point)

Objects seem to move across the sky, and Earth did not feel like it was moving.***

Telescopes allowed for a much detailed view of the circular orbits of the planets.

Noticing the gravity will eventually pull all the planets and the universe back together.

Measurements and mathematical models demonstrated that the planets orbit around the sun.

6. Which ideas describe the big crunch?(1 point)

The universe is not only composed of the objects that we can see.

The universe goes through infinite cycles of expansion and contraction.

The big bang actually never occurred, and the universe must have a different origin.

After the universe reaches its expansion limit, gravity will pull it all back together.***

7. Use the excerpt from an online article to answer the question.

“While the big bang theory is the most popular modern theory of how the universe formed, it is incomplete.”

Which question does the big bang theory leave unanswered?

(1 point)

What is the future of the universe?

How did galaxies and stars form?

What is the temperature of deep space?***

When did the universe form?

8. Which theory of how the universe formed is best supported by evidence of radio waves detected in space?(1 point)

heliocentric model

steady state theory

big crunch theory

big bang theory***

9. What triggered the cyclic model of the origin of the universe?(1 point)

Some scientists argue that the planets do not orbit in circles around the sun.

Some scientists began to use telescopes and mathematics to study the universe.

Some scientists found that the amount of radiation in space is not consistent with an explosion.

Some scientists think that the universe will not keep expanding forever.***

Please check my answers!

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  1. Hmmm, they all look right, however, I am not sure for NO.9

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  2. Yeah, I am also not sure for Number 9.
    The other questions look right.

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  3. Can someone please help me! I don't have much time.

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  4. I think number 3, 7, and 9 are wrong. 3 is wrong because niversetoday.com/33006/what-is-the-difference-between-asteroids-and-comets/ says that they both orbit the sun. I think 7 is A and idk about 9. Anyways I am taking this test will give answers after I take it.

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  5. I remember in our lessons the cyclic model said something about the universe expanding but idk maybe im wrong

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  6. Can anyone explain spectrum readings to me? Ive looked them up but i dont get it :(

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  7. here no its
    A spectrum plural spectra or spectrums is a condition that is not limited to a specific set of values but can vary, without steps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism. As scientific understanding of light advanced, it came to apply to the entire electromagnetic spectrum. It thereby became a mapping of a range of magnitudes (wavelengths) to a range of qualities, which are the perceived "colors of the rainbow" and other properties which correspond to wavelengths that lie outside of the visible light spectrum.

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  8. im pretty sure 3 is wrong, comets and asteroids are made of rocks and stuff

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  9. That doesn't help me at all does anyone have some helpful information

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  10. If your gonna give people answers than just look it up on Google and the give the answers

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  11. Why are the same questions in grades 3 years apart? Y'all have at it.
    pinwheel
    a black hole
    Both orbit the sun
    Saturn
    Objects seem to move across the sky, and Earth did not feel like it was moving
    After the universe reaches its expansion limit, gravity will pull it all back together
    What is the future of the universe?
    Big Bang Theory
    Some scientists think that the universe will not keep expanding forever
    There is a red shift, which means that the star is moving away from the sun
    Last 3 answer yourself.

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  12. 1. pinwheel
    2. A black hole.
    3. Both orbit the sun.
    4. Saturn
    5. Noticing the gravity will eventually pull all the planets and the universe back together.
    6. After the universe reaches its expansion limit, gravity will pull it all back together.
    7. What is the future of the universe?
    8. Big Bang Theory
    9. Some scientists think that the universe will not keep expanding forever.

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