IA 1 Reveiw Questions 2324
What does astronomical units measure?
Distances in space-1 AU is the distance between the sun and Earth
What causes day and night?
Earth's rotation
Who discovered 4 of Jupiter's moons that provided evidence supporting the heliocentric model?
Galileo
Earth centered model of the universe
Geocentric Model
Did Ptolemy support the Geocentric or Heliocentric model?
Geocentric model
Sun centered model of the solar system
Heliocentric model
What did Copernicus propose?
Heliocentric universe (sun centered)
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List the four outer planets in order from the sun
Jupiter, Saturn, Uranus, Neptune
Which planet is known as the red planet?
Mars
List the four inner planets in order from the sun
Mercury, Venus, Earth, Mars
What evidence supports the Big Bang Theory?
Red shifts indicate that galaxies are moving away from each other
What is the accepted theory of the origin of the universe?
The Big Bang Theory
What is the hottest planet in the solar system?
Venus
The planets get colder as you move farther from the sun with one exception. Name the planets in order from hottest to coldest.
Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving in
a straight path
Why do scientific theories change over time?
advances in technology provides new evidence
What is located between Mars and Jupiter?
asteroid belt
What space rock is large and found between Mars and Jupiter?
asteroids
A comet's tail always points
away from the sun
What space rock is made of ice, rock, and dust?
comet
What is the shape of the planets orbit around the sun?
elliptical
What are the outer planets made of?
gas, mostly hydrogen and helium
What do the geocentric and heliocentric models explain?
how the celestial bodies in our solar system orbit
What are the two main gases in the outer planets?
hydrogen and helium
Where is our solar system located in the Universe?
in one of the arms of the Milky Way Galaxy about halfway from the center of the galaxy
What property has the greatest effect on gravity?
mass
If a meteoroid enters the Earth's atmosphere, it is called a (an) ________ .
meteor
If a meteoroid hits Earth's surface, it is called a
meteorite
A small space rock floating in space is a
meteoroid
What did Kepler discover?
planet's orbit is elliptical
What are the inner planets made of?
rock and metal
Inner planets are __________ in size than outer planets.
smaller
What type of galaxy is the Milky Way?
spiral galaxy
What does an irregular galaxy look like?
stars are clustered, but have no definite shape
What does an elliptical galaxy look like?
stars are in a circular or oval cluster
1 AU (astronomical unit)
the distance between the earth and the sun
Why do planets orbit the sun?
the sun's gravitational force
Moons orbit their planets because
their planet has the greatest gravitational force on it
Order from largest to smallest (planet, universe, galaxy, solar system)
universe, galaxy, solar system, planet
