Reasons for Seasons
Heating Up
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Exploring Direct and Indirect Sunlight

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National Science Education Standards

Science as Inquiry

  • Ask a question about objects, organisms, events. (K-4)
  • Scientists develop explanations using observations (evidence) and what they already know about the world. Good explanations are based on evidence from investigations. (K-8)

Physical Science/Earth and Space Science

  • Objects in the sky have patterns of movement. The sun, for example, appears to move across the sky in the same way every day. (K-4)
  • An object's motion can be described by tracing and measuring its position over time. (K-4)
  • The sun, moon, stars, clouds, birds, and airplanes all have properties, locations, and movements that can be observed and described. (K-4)
  • Most objects in the solar system are in regular and predictable motion. Those motions explain phenomena such as the day, the year, phases of the moon, and eclipses. (5-8)
  • Seasons result from variations in the amount of 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)