This resource has 13 correlations with the National Standards.  
[HIDE CORRELATIONS]

• Physical Science
  • Motion and Forces
    • Gravitation is a universal force that each mass exerts on any other mass. (9-12)

• Earth Science
  • Changes in earth and sky
    • The surface of the earth changes.
    • Some changes to the surface of the Earth are due to rapid processes, such as landslides, volcanic eruptions, and earthquakes
    • Objects in the sky have patterns of movement.
    • The sun appears to move across the sky in the same way every day, but its path changes slowly over the seasons.
    • The moon moves across the sky on a daily basis much like the sun.
    • The observable shape of the moon changes from day to day in a cycle that lasts about a month.
  • Earth in the solar system
    • The earth is the third planet from the sun in a system that includes the moon, the sun, eight other planets and their moons, and smaller objects, such as asteroids and comets. (5-8)
    • The sun, an average star, is the central and largest body in the solar system. (5-8)
    • The motions of most objects in the solar system explain such phenomena as the day, the year, phases of the moon, and eclipses.
    • Gravity is the force that keeps planets in orbit around the sun and governs the rest of the motion in the solar system. (5-8)
    • The sun is the major source of energy for phenomena on the earth's surface, such as growth of plants, winds, ocean currents, and the water cycle. (5-8)
    • Seasons result from variations in the amount of the sun's energy hitting the surface, due to the tilt of the earth's rotation on its axis and the length of the day. (5-8)