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Benchmarks
By the end of 8th grade, students should know that:
- Many chunks of rock orbit the sun. Those that meet the Earth glow and disintegrate from friction as they plunge through the atmosphere -- and sometimes impact the ground. Other chunks of rock mixed with ice have long, off-center orbits that carry them close to the sun, where the sun's radiation (of light and particles) boils off frozen materials from their surfaces and pushes it into a long, illuminated tail. 4A/M4
National Science Education Standards
Earth and Space Science
Grades 5-8
- Earth in the Solar System: The earth is the third planet from the sun in a system that includes the moon, the sun, seven other planets and their moons, and smaller objects, such as asteroids and comets. The sun, an average star, is the central and largest body in the solar system.
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