Category 1: The Universe
What is the theory that explains how the universe began?
Big Bang Theory
what is the galaxy we live in
what is the milky way galaxy
The force that pulls objects toward one another.
what is gravity
Name the four inner planets
what is Jupiter, Saturn, Uranus, Neptune
A ball of ice and dust with a tail.
what is a comet
A model where Earth is at the center of the universe.
The Geocentric Model
Name one type of galaxy other than spiral.
what is Elliptical or Irregular
the tendency of an object to resist a change in motion
what is intertia
which planet is known as the "Red planet"
what is Mars
A rocky object smaller than a planet, mostly found between Mars and Jupiter.
Who proposed the heliocentric model of the solar system?
what is Copernicus (later supported by Galileo)
Put these in order from largest to smallest: Solar System, Galaxy, Universe, Planet, Star.
what is Universe → Galaxy → Solar System → Star → Planet
explain why planets don't crash into the sun
what is Inertia keeps them moving forward and gravity pulls them inward, balancing to create orbit.
Compare characteristics of inner and outer planets.
what is Inner = small, rocky, few moons, close to Sun.
Small rock fragments that break off asteroids or comets.
what is Meteoroids
Give one piece of evidence that supports the Big Bang Theory.
Compare spiral and elliptical galaxies.
what is Spiral = flat with arms, lots of young stars.
Elliptical = round/oval, mostly older stars.
how do gravity and intertia work together to keep Earth in orbit
what is Gravity pulls Earth toward the Sun, while inertia keeps it moving forward in a straight line—together they cause orbit.
Why is Earth the only planet that can sustain life?
what is
It has liquid water, breathable atmosphere, moderate temperature, and protective atmosphere/magnetic field.
Compare the orbit of a comet to the orbit of a planet.
what is Comets = long, elliptical orbits.
Planets = more circular orbits.
Explain how scientific theories about the universe change over time.
what is They change when new evidence is discovered, replacing old models with updated ones.
Where is our solar system located within the Milky Way?
what is On one of the spiral arms (Orion Arm)
A ball rolling on the ground keeps moving until friction stops it OR Passengers lurch forward when a car stops suddenly.
Match Inner planets/ out planets ----->>>> Thin atmosphere or thick atmosphere
Inner planets: Thin atmosphere
Outer planets: Thick Atmosphere
What effects could a large asteroid impact have on Earth?
Crater formation, climate change, mass extinction, destruction of ecosystems.