A ball of ice and dust whose orbit is a long narrow ellipse.
What is a comet?
100
Objects revolving around the sun that are too small and numerous to be considered planets.
What is an asteroid?
100
A chunk of rock or dust in space.
What is a meteoroid?
100
Name the planets in order from the sun.
What is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune?
200
A meteoroid that has hit Earth's surface.
What is a meteorite?
200
Gas planets have _____ cores.
What is solid?
200
The corona sends out a stream of electrically charged particles called _____________.
What is a solar wind?
200
The elements that make up the atmosphere of the outer planets.
What is hydrogen, helium, and other elements?
200
The outer layer of the sun.
What is the corona?
300
The middle layer of the sun's atmosphere.
What is the chromosphere?
300
The sun's core is ______degrees Celsius.
What is about 15 million degrees Celsius?
300
Mars has season's like Earth because. . .
What is its tilted on an axis like Earth?
300
The inner most layer of the sun's atmosphere.
What is the photosphere?
300
The trapping of heat by the atmosphere.
What is the greenhouse effect?
400
The reason why Uranus has a blueish tint to it.
What is methane?
400
The thing that keeps the giant planet gasses from escaping into space.
What is gravity?
400
List 3 features on the sun.
What are sunspots, solar flares, and prominences?
400
The two discoveries that Galileo made to support the heliocentric theory.
What is the moons revolving around Jupiter, not earth and Venus goes through phases just like Earth's moon, and these phases cannot be explained if Earth was at the center?
400
Nuclear fusion occurs when. . .
What is hydrogen atoms combine to form helium atoms?
500
Describe the geocentric system.
What is the Earth is the center of the revolving planets which is Ptolemy's theory from A.D. 140?
500
Describe the heliocentric system.
What is the sun at the center of the revolving planets which is the idea of Copernicus in the 1500's?
500
Describe the Goldilocks conditions?
What is the "just right" conditions on Earth that scientists believe are necessary for life?
500
Describe inertia and gravity and how it keeps the planets around the sun.
What is the suns gravity pulls the planets toward the sun while inertia keeps them moving ahead and the result is that the planets orbit the sun?
500
Name the unique features of each of the outer planets.
What is Jupiter: Great Red Spot; Saturn: The broad rings around the planet; Uranus: Axis is tilted on a 90 degree angle; Neptune: The Great Dark Spot?