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Earth in Space
Gravity and Motion
Phases, Eclipses and Tides
Observing the Solar System
Sun, Moon & Mixed Questions
100
Earth moves in space in these two ways
What rotation and revolution
100
a push or pull
What is force
100
the phases of the moon are caused by this
What is the changing relative position of the moon, Earth and sun
100
in this incorrect system, Earth is at the center of teh revolving planets
What is geocentric system
100
the part of the scientific method where you explain whether your hypothesis was accepted or rejected
What is conclusion
200
December 21st in the Northern hemisphere
What is winter solstice
200
the force that attracts all objects toward each other
What is gravity
200
when the moon passes directly between Earth and the sun, blockign sunlight from Earth
What is solar eclipse
200
the Greek astronomer that developed the geocentric system
Who is Ptolemy
200
maria, craters and highlands
What are features on the moon's surface
300
when the noon sun is directly overhead at the equator
What is equinox
300
it states that every object in the universe attracts every other object
What is the law of universal gravitation
300
the very darkest part of the shadow in an eclipse
What is umbra
300
the system in which Earth and the planets revolve around the sun
What is heliocentric system
300
core, radiation zone and convection zone
What are the three layers of the sun's interior
400
the imaginary line that passes through Earth's center from the North pole to the South pole
What is axis
400
the strength of the force of gravity depends on on these factors
What are the masses of the objects and the distance between them
400
the rise and fall of ocean water that is caused every 12.5 hours or so
What is tide
400
the Polish astronomer who further developed the heliocentric system
Who is Nicolaus Copernicus
400
this theory states that a planet-shaped object collided with Earth to form the moon
What is the collision-ring theory
500
because Earth is tilted on its axis as it revolves around the sun, these are caused
What are seasons
500
the tendency of an object to resist a change in motion
What is inertia
500
the gravity from this causes tides
What is the moon
500
he discovered that each planet travels in an elliptical orbit instead of a circular orbit
Who is Johannes Kepler
500
areas of gas on the sun's surface that are cooler than the gases around them
What are sun spots