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27 Cards in this Set

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Frozen masses of gas and dust which have a definite orbit through the solar system.
comet
A magnetic storm on the the Sun's surface which appears as a dark area. A sunspot is approximately 1500 degrees Celsius cooler than it's surrounding material. The number of sunspots we see on the Sun at any given time appears to cycle every 11 years.
sunspot
Name the inner planets known as the rocky planets.
Mercury
Venus
Earth
Mars
A theory which states that the Universe began to expand after a super powerful explosion of concentrated matter and energy.
The big bang theory
Name the Earth's only satellite?
the moon
The area in which an attractive or repelling force exists between two magnets or in association with the element iron. The Earth's magnetic field is thought to be due to the liquid iron-nickel which is in its core. This magnetic field protects Earth from constant bombardment by high-energy charged particles
magnetic field
Which planet is known as Earth's twin?
Venus
Usable heat or power; in physics, it is the capacity of a physical system to perform work.
Energy
How much of the Earth's surface is covered by water?
70%
The force of attraction between two objects which is influenced by the mass of the two objects and the distance between the two objects
gavity
The Sun and all of the planets, comets, etc. which revolve around it.
Solar System
Name the outer planets.
Jupiter
Saturn
Uranus
Neptune
Pluto
A continuous stream of charged particles which are released from the Sun and hurled outward into space at speeds up to 800 kilometers per second. Solar winds are very prominent after solar flare activity
Solar Wind
A shadow which falls on an area of Earth when the Moon moves between the Sun and Earth.
SOLAR ECLIPSE
The measure of the amount of matter in an object.
mass
How many planets are there in our solar system?
nine
Is rotation how a planet spins on its axis or the path it takes around the sun?
spins on its axis
Anything which has mass and occupies space.
Matter
Why does the Earth have seasons?
because of the tilted axis and revolution
The orbits of the planets are not circular they are ______.
elliptical
The process by which plants use carbon dioxide, nutrients, and sunlight to produce food.
PHOTOSYNTHESIS
How long does it take for the Earth to turn one time on its axis?
24 hours
How long does it take the Earth to make one revolution around the sun?
365.26 days
Which planet is furthest from the Sun?
Pluto
When is the longest day of the year?
summer solstice
The time is takes for a planet to make one complete trip around the sun is its period of __________.
revolution
Tides are caused mainly by the_______.
gravity of the moon.