sci reviewer

• Location - the place where you are right now. It is important when you move from one place to another when in motion.
• Distance - Is the length between any two points.
• Displacement – difference between an

  object’s final position and its starting position.
• Galileo Galilei was the first scientist who suggested that once an object is moving
• Motion – is a change in position relative to a frame of reference.
• Newton’s first law of motion – states that an object at rest will remain
• Inertia– an object’s tendency to remain in its state of motion.
• Speed – is the ratio between distance and time.
• Distance – is the length between any two points.
• Time – is the period during which a certain distance is covered.
• Velocity – the speed of an object and the direction toward which it is moving.
• Acceleration - Is the rate of change of velocity per unit time.
• Deceleration - A decreased in speed.
• Strong Nuclear Force - the force that holds the protons.
• Electromagnetic Force - the force of attraction between two objects.
• Weak Nuclear Force - said to be stronger than gravitational force.
• Distance - traveled is the length of the path
• Scalar Quantity - direction does not affect.
• Vector Quantity - direction affects the quantity
• retina - a layer of tissue lining the inner
• rods - to see black , white
• cones - used to sense color ( rainbow )
• reflection - bouncing
• refraction - bending
• transparent - air , water and clear glass allow most light
• translucent - thin cloth , some plastics
• opaque - materials do not allow to pass through them
• LED - Light emitting diode
• convergence - convex
• Divergence - concave
• Convex - meets at 1 point