Question

uranus and neptune have some similarities:
o a appears blue
o b roughly 400 times earths diameter
o c both
o d neither
question 2 (1 point)
we think underneath the exotic ices on plutos surface and underneath the water - ice crust, which could easily be 100 kilometers thick, that theres actually a layer of liquid water that surrounds the rock core.
o true
o false
question 3 (1 point)
circumstellar disks are a common occurrence around very young stars, suggesting that disks and stars form together. models show that material begins to coalesce first by forming smaller objects, precursors of the planets, which we call _?_
o a planetoids
o b planetesimals

Explanation:

• Question 1: Uranus and Neptune appear blue due to methane in their atmospheres. Uranus has a diameter about 4 times Earth's, Neptune about 3.9 times. So option a is correct.
• Question 2: Pluto is thought to have a subsurface ocean beneath its icy crust. So the statement is True.
• Question 3: Planetesimals are the precursors of planets formed by coalescence in circumstellar disks.

Answer:

Question 1: A. appears blue
Question 2: True
Question 3: B. planetesimals