Vocab 1
Tendency of an object to resist a change in motion; keeps earth from falling into the sun
What is inertia
the force that pulls objects toward each other
what is gravity
Developed a Geocentric model.Claimed that the Moon, Mercury, Venus, and the Sun revolved around the Earth. The world followed his beliefs for over one thousand years.
Who is Ptolemy
what is Mass and Distance
The force of gravitational pull on an object
what is weight
The scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by an outside force.
what is Newtons first law of motion
Greek astronomer who inspired Nicolaus Copernicus. He correctly placed the Sun in the center of the solar system.
the shape of each planet is ______
A system where the Earth is considered the center of the solar system, with the Moon, planets, the Sun, and stars all rotating around the Earth.
what is the geocentric model
The amount of matter in an object.
what is mass
Used mathematical observations to figure out that the orbits of the planets are elliptical.
Who is Kepler
if objects are closer together the gravity is stronger, if objects are further apart the gravity is less.
A system in which the planets revolve around a fixed Sun; Mercury, Venus, Earth, Mars, Jupiter, and Saturn all orbit the Sun.
what is heliocentric
The scientific law that states that for every action there is an equal and opposite reaction
What is Newton's 3rd law of motion
First man to report telescopic observations of the moons of Jupiter and the rings of Saturn.
Who is Galileo
The scientific law that states that every object in the universe attracts every other object.
what is the law of universal gravitation
the orbit of each planet ;A circle that has been squashed or flattened a bit; more like an oval;
what is ellipse
The scientific law that states that an object’s acceleration depends on its mass and on the net force acting on it.
what is Newton's second law of motion
Greek astronomer who inspired Nicolaus Copernicus. He correctly placed the Sun in the center of the solar system.
Who is Aristarchus
If you go to the moon, does your mass or weight change? Do you weigh more or less?
Your weight changes because the pull of gravity is less