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PH Concepts in Action CH 25
Solar System
53
Science
9th Grade
05/05/2009

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Term
Heliocentric
Definition
Model of Solar System where Earth and other planets revolve around the Sun
Term
Geocentric
Definition
Model of Solar System where Earth is stationary while objects orbit Earth.
Term
Ecliptic plane
Definition
Imaginary plane in space that contains Earth's orbit.
Term
Moon
Definition
Relatively small body in space that revolves around a planet.
Term
Astronomical Unit
Definition
Equivalent to average distance between the Earth and the Sun.
Term
Space Probe
Definition
Unpiloted viehicle that carries scientific instruments into space to gather data.
Term
Maria
Definition
Low, flat plains formed by lunar lava flows on the Moon
Term
Crater
Definition
Round depressions on Moon's surface formed from meteoroid impacts.
Term
Meteoroids
Definition
Chunks of rock that move through the solar system.
Term
Phases
Definition
Different shapes of the moon visible from Earth.
Term
Eclipse
Definition
When the shadow of one solar body falls on another solar body.
Term
Umbra
Definition
The darkest part of the Moon's shadow.
Term
Penumbra
Definition
Larger, less dark region of the Moon's shadow.
Term
Tides
Definition
Regular rise and fall of the ocean waters.
Term
Spring Tide
Definition
when change between high and low tides is the greatest
Term
Neap Tide
Definition
When the different between high tide and low tide are the lowest.
Term
Terrestrial Planets
Definition
Four, inner planets of similar composition to Earth
Term
Asteroids
Definition
small, rocky bodies that orbit the Sun.
Term
Asteroid Belt
Definition
Region beyond Mars where many asteroids are located.
Term
Gas Giants
Definition
Four larger planets made mostly of hydrogen and helium. They are also farthest from the Sun.
Term
Ring
Definition
Disk made of small rock and ice in an orbit around a planet.
Term
Kuiper Belt
Definition
Region, donut shaped, made of many ice, dust, and rock particles. This is beyond Pluto.
Term
Oort Cloud
Definition
Very sparse sphere of comets. Believed to circle the solar system.
Term
1st planet from the Sun
Definition
Mercury
Term
Planet that has the fastest orbital velocity (revolves the fastest)
Definition
Mercury
Term
The smallest planet
Definition
Mercury
Term
2nd planet from the Sun
Definition
Venus
Term
Has a runaway greenhouse effect
Definition
Venus
Term
Hottest planet
Definition
Venus
Term
3rd Planet from the Sun
Definition
Earth
Term
Planet with active plate tectonics
Definition
Earth
Term
Planet with atmosphere suitable to life
Definition
Earth
Term
4th Planet from the Sun
Definition
Mars
Term
Planet that does not have liquid water but has evidence of water erosion is
Definition
Mars
Term
Planet with the largest volcano-Olympic Mons
Definition
Mars
Term
Only planet to successfully have an unmanned spacecraft land and collect data is?
Definition
Mars
Term
The largest planet in the solar system is?
Definition
Jupiter
Term
The planet famous for its Great Red Spot is?
Definition
Jupiter
Term
The 5th planet from the sun is?
Definition
Jupiter
Term
Which planet has the most moons.
Definition
Jupiter
Term
Which planet is the 6th from the sun?
Definition
Saturn
Term
Which planet is famous for its colorful rings?
Definition
Saturn
Term
Which planet rotates almost on its side?
Definition
Uranus
Term
Which planet is the 7th planet from the sun?
Definition
Uranus
Term
Which planet in addition to Earth has a magnetic field?
Definition
Uranus
Term
Which planet is 8th from the sun?
Definition
Neptune
Term
Which planet is known as "the blue planet?"
Definition
Neptune
Term
Which planet is blue due to methane gas and ice crystals in atmosphere?
Definition
Neptune
Term
Which planet has the great Dark Spot?
Definition
Neptune
Term
Which group of planets is known as the terrestrials or the rockies?
Definition
The 4 inner planets
Term
What four planets make up the inner planets?
Definition
Mercury, Venus, Earth, & Mars
Term
Which planets make up the outer planets?
Definition
Jupiter, Saturn, Uranus, Neptune
Term
What do we call the four planets made of gas that have low density?
Definition
The outer planets, Gas Giants.
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