Question

select all the correct answers. events involving a disk - shaped nebula occurred before the nuclear fusion that led to the birth of the solar system. which two statements about the disk - shaped nebula are true? gravity caused the disk - shaped nebula to shrink. gravity caused the nebula to flatten out in its disk - like shape. rotational motion caused the disk - shaped nebula to shrink. rotational motion caused the nebula to flatten out in its disk - like shape. the flattening of the disk caused the speed of rotation to decrease.

Explanation:

1. Gravity caused the disk - shaped nebula to shrink as gravitational forces pulled the material inwards.
2. Gravity also caused the nebula to flatten out in its disk - like shape due to the balance between gravitational forces and rotational motion. Rotational motion did not cause the nebula to flatten out in its disk - like shape; rather, it was the interaction with gravity. Also, the flattening of the disk did not cause the speed of rotation to decrease.

Answer:

Gravity caused the disk - shaped nebula to shrink, Gravity caused the nebula to flatten out in its disk - like shape