A snowball that rolls down a hill,gradually gaining more and more mass and rolling faster and faster as it continues,would be an example of a(n)
A)positive feedback system.
B)negative feedback system.
C)open system.
D)closed system.

Question

Quizplus · Accepted Answer

A snowball that rolls down a hill and gains more mass and momentum is an example of positive feedback system. As it gains more mass, it collects more snow which in turn increases its size and momentum, accelerating it further down the hill. This positive feedback loop continues until the snowball eventually stops or collides with something.

A Snowball That Rolls Down a Hill,gradually Gaining More and More