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20 Cards in this Set

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  • Back
newton's first law of motion is ___________?
I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
newton's second law of motion is ____________?
II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
newton's third law of motion is ____________?
III. For every action there is an equal and opposite reaction.
what is a nebulae?
any of numerous clouds of gas or dust in interstellar space.

what a star is born from.
our type of galaxy.
the milky way galaxy is a spiral galaxy.
elliptical galaxy.
a galaxy that has a generally elliptical shape and that has no apparent internal structure or spiral arms.
spiral galaxy.
a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity -- called also spiral nebula

**our galaxy
irregular galaxy.
galaxy that is not able to be classified.

random patterns.
what affects does a medium's density have on waves?
higher density = faster waves.
how do molecules in ocean waves move?
up and down.
what's the speed of waves through a vacum.

**no air.
transverse waves cant travel through a vacuum because there is no medium.

electromagnetic waves travel faster through the vacuum because there is no medium.
define pitch.
how low or high the wave is.
define frequency.
the # of waves in a ceartin time.

how close together the waves are.
less crowded area [section] of waves.
the bending of waves.
SI unit to measure force.
newtons. N
SI unit to measure frequency.
hertz. Hz
list the subatomic particles and the charges associated with each.
the evidence to support the big bang theory.
that all galaxy move away from eachother.
what is a light year?
the distance that light travels in one year.