A student stands on the edge of a cliff that is 300 m high and kicks a rock horizontally. How much time is required for the rock to hit the ground? A) 12.2 B) 7.8 C) 2.5 D) 9.2

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults