Science Vocabulary By Jeffrey Conwell B 3 11210

Science Vocabulary By Jeffrey Conwell B 3 11/2/10

Speed Ø How we measure motion. Ø How fast something travels/moves from one point to another. Ø D [distance] -: - T [time] = S [speed]

Motion Ø The changing of a position of an object.

Time Ø The measurement of the period between events.

Force ØThe push or pull on something makes it move

Newton [N] Ø Force is measured with it; about the weight of an apple [approximately ¼ lb. ]

Distance Ø A measurement of how far from each other, from two points or places are. Ø How far did an object travel.

Velocity Ø The speed of an object in a particular direction [North, South, East, Ø and West]

Acceleration Ø Any change in the speed and direction [velocity] of an objects motion.

Reference Point Ø An object that appears to stay in place in relation to an object being observed for motion.

Net Force Ø The force that appears, from combing forces, on one object. Ø N+N [Same direction] Ex: move piano. Ø N-N [Different direction] Ex: tug-owar

Balanced Forces Ø When all the push and pull [force] on something makes it stay still or move at the same speed in the same direction.

Unbalanced Forces Ø When all the push and pull [force] on something makes it move if something is still, it starts to move. Ø If moving, it changes speed and direction

Mass Ø The mass is how much stuff [matter] is in something.

Gravity Ø The force that pulls things toward earth.

Weight Ø The gravitational force acting on an object.

Friction Ø The rubbing of two surfaces; it is the force of surfaces in contact with each other.

Contact Forces Ø Pushes and pulls that result from direct touching of objects.

Non-Contact Forces Ø Pushes and pulls that result without direct touching of an object; acting at a distance