Answer to Question 1
The solar nebula theory implies that the planets formed along with the sun and undergoes three steps.
Step 1: A rotating cloud of gas contracts and flattens to form a thin disk of gas.
Step 2: Form a thin disk of gas and dust around the forming sun at the center.
Step 3: Planets grow from gas and dust in the disk and are left behind when the disk clears.
OR could simplify with these terms: heating, spinning, flattening
Answer to Question 2
True