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20 terms

Unit 9 20 Cards

STUDY
PLAY
What two elements make up the majority of the sun?
Hydrogen and Helium
What phenomenon occurs when the Moon passes directly between the Earth and the Sun?
Solar Eclipse
A body that moves around a larger body is space is called a ______________.
satellite
What process produces the Sun's energy?
nuclear fusion
Which layer of the Sun is visible to humans?
Photosphere
Why is the Earth's magnetic field important?
It protects us from harmful solar winds
How long does it take for the Moon to complete one orbit around Earth?
27.3 days
The most accepted explanation for how the Moon formed is called the ____________.
Giant Impact Hypothesis
What shape do most orbits in the solar system follow?
ellipse
Cooler, darker areas on the Sun's surface are called ________________.
sunspots
Which planet has the most gravity?
Jupiter
Which planet has an enormous storm called the Great Red Spot?
Jupiter
Which planet has a thick atmosphere and an extreme greenhouse effect making it the hottest planet?
Venus
Which planet is turned sideways so that part of the planet never faces the Sun?
Uranus
Which planet has the shortest year?
Mercury
Shooting stars are actually _________________.
Meteors burning high in the mesosphere
Small icy bodies with tails of gas and dust are called _______________.
comets
Copernicus proposed that all planets orbit the Sun. This model of the Solar System is called the ________________ model.
heliocentric
Rocky bodies that orbit the Sun, most of which are between Mars and Jupiter, are called _______________________.
asteroids
The most widely accepted explanation for how the Solar System formed is called the ___________________________.
nebular hyptothesis