Question

question 10 (1 point)
the solar system consists of the sun and _?_
o a planets their moons and rings
b \debris\ asteroids, comets, and dust.
o c both
d neither
question 11 (1 point)
life, as we know it, depends on liquid water. only _? has had that ability to retain liquid water over its long history.
o o earth
b mars
o c mercury
d venus
question 12 (1 point)
the discovery of the kuiper belt, in the _? is probably the single most important discovery of the space age. it completely
changed everything.
o a 1980s
b 1990s
o c 2000s
d 2010s

Explanation:

For Question 10: The solar system includes the Sun, planets with their moons and rings (like Saturn's rings), and also debris such as asteroids, comets, and dust. So both options a and b are correct.
For Question 11: Earth has had the ability to retain liquid water over its long history. Mars has evidence of past water but not in liquid form over the long - term like Earth. Mercury is too hot and has no liquid water, and Venus has a very harsh environment with no liquid water.
For Question 12: The Kuiper Belt was discovered in the 1990s.

Answer:

Question 10: C. both
Question 11: A. Earth
Question 12: B. 1990's