Which is evidence that scientists use to support the big bang theory?

a.
earth is the only planet with permanent liquid water on its surface.

b.
the outer planets are mostly composed of hydrogen and helium.

c.
most galaxies are moving away from each other.

d.
most orbits have an elliptical shape.
2.

(10 pt) where is most of the mass of the solar system today?

a.
in earth and the other planets

b.
in the sun

c.
in the asteroid belt

d.
in the various moons
3.

(10 pt) how do the orbits of the outer planets compare to the inner ones?

a.
elliptical with larger orbital radii

b.
circular with larger orbital radii

c.
elliptical, but in a different plane

d.
circular, but in a different plane
4.

(10 pt) which is the correct position from the center of the solar system of the sun, earth, and moon during a solar eclipse?

a.
sun, moon, earth

b.
sun, earth, moon

c.
earth, sun, moon

d.
moon, sun, earth
5.

(10 pt) during which lunar phase is the moon’s far side entirely lit?

a.
full moon

b.
first quarter

c.
last quarter

d.
new moon
6.

(