process where hydrogen atoms join together to make helium; sun's energy comes from this process
What is nuclear fusion?
100
name them
What is Earth; Mercury; Venus; Mars
100
how they compare to the inner planets (except for Pluto)
What is larger and do not have solid surfaces?
100
chunks of ice that orbit the sun
What is a comet?
100
the temperature of the Sun's core
What is 15 million degrees celsius?
200
the 3 parts of the sun's atmosphere
What is photosphere, chromosphere, and corona?
200
another name for them
What is terrestrial planets?
200
causes them to have deep atmospheres
What is strong gravitational force?
200
too small and too numerous to be considered planets
What is an asteroid?
200
earth's twin
What is Venus?
300
name the sun's features
What is sunspots; prominences; and solar flares?
300
their characteristics
What is small and rocky
300
has a thick atmosphere with a Great Red Spot
What is Jupiter?
300
chunk of rock or dust that comes from comets or asteroids
What is a meteoroid?
300
doesn't fit the characteristics of the other gas giants
What is Pluto?
400
a stream of electrically charged particles from the corona
What is solar wind?
400
has seasons because its axis is tilted
What is Mars?
400
was discovered because another planet did not follow the predicted orbit
What is Neptune?
400
where most asteroids revolve around the sun...name it; where is it?
What is the asteroid belt, located between the orbits of Mars and Jupiter?
400
the largest ones have names
What are asteroids?
500
name 2 reasons the sun is important
What is: the sun's provides all the energy we need for life; the sun's gravity keeps the planets in orbit
500
carbon dioxide traps heat in the atmosphere, causing a greenhouse effect on this planet
What is Venus?
500
planet less dense than water
What is Saturn?
500
the difference between a meteorite and meteor
What is a meteor is the streak of light we see when a meteoroid enters Earth's atmosphere; a meteorite is when the meteor doesn't burn up and hits Earth's surface.