Question 9 (1 point)

Question

Copernicus devised the heliocentric theory of the Solar System.

Why was his heliocentric theory NOT accepted at the time that he proposed it?

a
There wasn't enough observable evidence to confirm his theory
b
It went against the accepted scientific theories of Aristotle and Ptolemy at the time
c
It challenged the current religious teachings of the church at the time
d
All of the above
e
None of the above

Question 10 (1 point)
Look at the following picture

a
Elliptical
b
Spiral
c
Irregular

Question 11 (1 point)
Where are the oldest stars located in a galaxy and why?

a
Center; the production of newer stars pushes the older stars towards the center of the galaxy
b
Outer area; the radiation from stars tends to put radiative pressure on nearby stars, eventually pushing them outward.
c
Outer area; the original stars are always created at the edge of a galaxy and stay there.
d
Center; gravity is highest in the middle of a galaxy, and older stars have had more time to get pulled towards the center.

Question 12 (1 point)
Which statement gives us the key Evidence that the Universe is Expanding?

a
Objects in the Universe are physically getting smaller, meaning they must be travelling farther away from each other
b
The Universe is getting hotter, which can only happen if the Universe is expanding faster.
c
Almost all light in the Universe is Blue-shifting, meaning those objects creating that light are moving away from each other.
d
Almost all light in the Universe is Red-shifting, meaning those objects creating that light are moving away from each other

Answer 1

Question 9: The correct answer is d - All of the above. Copernicus's heliocentric theory was not accepted at the time because it lacked sufficient observable evidence, contradicted the long-standing geocentric models of Aristotle and Ptolemy, and challenged religious teachings that placed Earth at the center of the universe.

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Question 10: Since I cannot see the picture, I can't provide the correct answer. However, here are the definitions:

• Elliptical: Smooth and featureless, often with older stars.
• Spiral: Characterized by swirling arms with young and old stars.
• Irregular: Lacks a defined shape, often containing active star formation.

Please refer to the image you have to determine the correct classification.

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Question 11: The correct answer is a - Center; the production of newer stars pushes the older stars towards the center of the galaxy. This is largely due to dynamical interactions and the merging of gas clouds at the galactic center, which leads to the formation and retention of older stars there.

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Question 12: The correct answer is d - Almost all light in the Universe is Red-shifting, meaning those objects creating that light are moving away from each other. The redshift of light from distant galaxies indicates that they are moving away, providing strong evidence for the expansion of the universe.