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20 questions
The actual shape of Earth's orbit is
a perfect circle
an ellipse
a sphere
a triangle
The diagram below represents a simple geocentric model. Which object is represented by the Letter X?
Sun
Moon
Earth
Polaris
The diagram represents our solar system. The system is best classified as
heliocentric, with circular orbits
heliocentric, with elliptical orbits
geocentric, with circular orbits
geocentric with elliptical orbits
In the geocentric model, which motion would occur?
Earth would revolve around the sun.
Earth would rotate on its axis.
The moon would revolve around the sun.
The sun would revolve around Earth.
Which statement best describes the geocentric model of the solar system?
All planets revolve around the sun.
The sun is located at the center of the model.
The Earth is located at the center of the model.
All planets except Earth revolve around the sun.
A red shift of light from very distant galaxies suggest that the universe is
fixed and stationary
moving randomly
expanding
contracting
Which evidence best supports the Big Bang Theory?
existence of cosmic background radiation
rate of rotation of the sun
uniform radioactive decay of Uranium-238
separation of Earth's interior into different layers
The diagram represents planets A and B, of equal mass, revolving around a star. Compared to planet A, planet B has a
weaker gravitational attraction to the star and a shorter period of revolution
weaker gravitational attraction to the star and a longer period of revolution
stronger gravitational attraction to the star and a shorter period of revolution
stronger gravitational attraction to the star and a longer period or revolution
The terrestrial planets differ from the Jovian planets because the terrestrial planets are
less dense and larger
less dense and smaller
more dense and larger
more dense and smaller
The length of an Earth day is determined by the time required for one
Earth revolution
Earth rotation
Why do the stars appear to move across the sky?
Because the Earth is spinning (rotating)
Because the stars are spinning (rotating)
Because you are dizzy
They're not, it is an illusion
What do scientists do when new information doesn't fit their existing models?
They adapt or change their model to fit the new information once they have confirmed it
They ignore the new information
They put their fingers in their ears and go lalalalala
They immediately throw everything they know out the window
Stars give off heat and light in a process called ___________.
nuclear fusion
supernova
luminosity
spectroscopy
Billions of stars are held together in groups called __________.
galaxies
solar systems
planets
comets
The luminosity of a star describes its ______________.
brightness
temperature
age
color
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