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Science Final
Science
26
Science
9th Grade
04/02/2012

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Term
Vector quantity
Definition
A physical measurement that contains directional information.
Term
Scalar quantity
Definition
A physical measurement that does not contain directional information.
Term
Acceleration
Definition
The time rate of change of an object's velocity.
Term
Kinetic friction
Definition
Friction that opposes motion once the motion has already started.
Term
Static friction
Definition
Friction that opposes the initiation of motion.
Term
Photons
Definition
A small "package" of light that acts like a particle.
Term
Electrical current
Definition
The amount of charge that travels past a fixed point in an electrical circuit each second.
Term
Resistance
Definition
The ability of a material to impede the flow charge.
Term
Mass number
Definition
The sum of the numbers of neutrons and protons in the nucleus of an atom.
Term
Atomic number
Definition
The number of protons in an atom.
Term
Amplitude
Definition
The height of a wave.
Term
Isotopes
Definition
Atoms with the same number of protons but different numbers of neutrons.
Term
Transverse wave
Definition
A wave with a direction of propagation that is perpendicular to its direction of oscillation.
Term
Longitudinal wave
Definition
A wave with a direction of propagation that is parallel to its direction of oscillation.
Term
Electromagnetic wave
Definition
A transverse wave composed of an oscillating electric field and a magnetic field that oscillates perpendicular to the electric field.
Term
Law of reflection
Definition
The angle of reflection equals the angle of incidence.
Term
Nuclear fusion
Definition
The process by which two or more small nuclei fuse to make a bigger nucleus.
Term
Nuclear fission
Definition
The process by which a large nucleus is split into small nuclei.
Term
Light year
Definition
The distance light could travel along a straight line in one year
Term
Frequency
Definition
The number of times a wave hits a certain point every second.
Term
Fundamental Forces in Creation
Definition
gravitational force, electromagnetic force, weak force, strong force
Term
How to calculate force
Definition
Divide by the distance and multiply by the square of the distance.
total force = (mass) • (acceleration)
Term
What are the regions of the sun?
Definition
Core, radiative zone, convection zone photosphere.
Term
Star Classification
Definition
Classified by heat(Sun is type G)
Term
How to calculate velocity
Definition
Velocity tells you speed and direction
Term
Electrical circuits
Definition
Energy flows from positive to negative, series and parallel circuits.
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