Question

question 25 of 25
which model best describes how gravity causes star formation?
a. a cup of water is dumped on the ground, where it forms a small pool.
b. two mugs crash into each other and break into many small pieces.
c. a long spool of thread is unwound and then wound back up.
d. a snowball grows as more snow sticks to it.

Explanation:

In star - formation, gravity causes matter to accumulate and grow in mass, similar to how a snowball grows as more snow sticks to it due to the force of cohesion (analogous to gravitational attraction in the star - formation context). Option A is about water pooling due to gravity and surface tension but not about growth by accumulation. Option B is about breakage, not accumulation. Option C is about winding and unwinding of thread, not related to accumulation by a force like gravity for growth.

Answer:

D. A snowball grows as more snow sticks to it.