Gravity/Motion
The shape of each planet’s orbit
elliptical
Does your mass or weight change if you went to Jupiter?
Weight (because the pull of gravity changes, but your mass will never change since mass is how much stuff/matter makes you up)
First to report telescopic observations of the moons of Jupiter and the rings of Saturn.
(Copernicus, Galilei, Aristarchus, Kepler, or Ptolemy)
Galileo
The law that states every object in the universe attracts every other object
Newton’s law of universal gravitation
If the moon was closer to the earth, would the gravitational pull become weaker or stronger
stronger
Developed the heliocentric model; correctly suggested that the Earth rotates daily on its axis and identified the arrangement of the plants.
(Copernicus, Galilei, Aristarchus, Kepler, or Ptolemy)
Copernicus
The tendency of an object to resist a change in motion
Inertia
The two things affect an object’s gravitational pull
mass & distance
Greek astronomer who inspired Copernicus; correctly placed the sun was at the center of the solar system.
(Copernicus, Galilei, Aristarchus, Kepler, or Ptolemy)
Aristarchus
The amount of gravitational pull on the object
Weight
Draw a geocentric model
Earth centered
Developed a geocentric model of the solar system that was used for many centuries
(Copernicus, Galilei, Aristarchus, Kepler, or Ptolemy)
Ptolemy
Why doesn’t the Earth simply fall into the sun?
The earth has inertia to continue moving as it is being pulled by gravity
Through mathematical calculations, found the orbits of the planets were not perfectly circular, but rather, elliptical or oval shaped.
(Copernicus, Galilei, Aristarchus, Kepler, or Ptolemy)
Kepler
The law that states 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
Newton’s first law of motion