The observed redshifts of galaxies are evidence for the Big Bang theory of the origin of the universe, because they indicate that...

Question

Responses

the galaxies are still very hot.
the galaxies are still very hot.

the galaxies cannot be seen from the other side.
the galaxies cannot be seen from the other side.

the galaxies are moving rapidly away in all directions.
the galaxies are moving rapidly away in all directions.

the galaxies turned red at the original moment of explosion.
the galaxies turned red at the original moment of explosion.

Answer 1

the galaxies are moving rapidly away in all directions.

Answer 2

is this correct

Answer 3

Yes, the correct response is: the galaxies are moving rapidly away in all directions. This is known as the cosmological redshift, where the light emitted by galaxies is stretched due to the expansion of the universe, causing it to shift towards the red end of the spectrum. This observation supports the Big Bang theory, which states that the universe is expanding from a dense, hot initial state.

Answer 4

The Sun's gravity pulls Earth toward it and keeps it from floating away into space. What keeps Earth from being pulled into the Sun?
Responses

Earth's sideways motion
Earth's sideways motion

the Sun's gravity
the Sun's gravity

the Moon's gravity
the Moon's gravity

Earth's gravity
Earth's gravity

Answer 5

Earth's sideways motion

Answer 6

is that correct

Answer 7

Yes, that is correct. Earth's sideways motion, along with its forward motion, helps to counterbalance the gravitational pull of the Sun. This results in Earth maintaining a stable orbit around the Sun, instead of being pulled directly into it.