What do scientists do to determine if their results support their hypothesis?

Nonpoint source pollution is difficult to control because it

Adepositional also feature that forms where a stream enters a lake or an ocean is a

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?