This resource has 21 correlations with the National Standards.  
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• Physical Science
  • Motion and Forces
    • Catapults are an ancient military device made for hurling projectiles. They are made from a variety of simple machines.
    • Objects change their motion only when a net force is applied. Laws of motion are used to calculate precisely the effects of forces on the motion of objects. (9-12)
    • The magnitude of the change in motion can be calculated using the relationship F = ma, which is independent of the nature of the force. (9-12)
    • Whenever one object exerts force on another, a force equal in magnitude and opposite in direction is exerted on the first object. (9-12)
    • Gravitation is a universal force that each mass exerts on any other mass. (9-12)
    • The strength of the gravitational attractive force between two masses is proportional to the masses and inversely proportional to the square of the distance between them. (9-12)
    • The strength of the force is proportional to the charges and, as with gravitation, inversely proportional to the square of the distance between them. (9-12)
    • Unbalanced forces will cause changes in the speed or direction of an object's motion. (Acceleration) (5-8)
    • An object that is not being subjected to a force will continue to move at a constant speed and in a straight line. (inertia) (5-8)
    • If more than one force acts on an object along a straight line, then the forces will reinforce or cancel one another, depending on their direction and magnitude. (5-8)

• Science as Inquiry
  • Abilities necessary to do scientific inquiry
    • Use data to construct a reasonable explanation.
    • Communicate investigations and explanations.
    • Use appropriate tools and techniques to gather, analyze, and interpret data.
    • Develop descriptions, explanations, predictions, and models using evidence.
    • Think critically and logically to make the relationships between evidence and explanations.
  • Understandings about scientific inquiry
    • Types of investigations include describing objects, events, and organisms; classifying them; and doing a fair test (experimenting).
    • Scientists develop explanations using observations (evidence) and what they already know about the world (scientific knowledge). Good explanations are based on evidence from investigations. (K-4)

• Process Standards for Professional Development
  • Research-Based
    • Prepares educators to apply research to decision making. (NSDC)
  • Design
    • Uses learning strategies appropriate to the intended goal. (NSDC)

• Teaching Standards
  • Teachers of science guide and facilitate learning. In doing this, teachers
    • Encourage and model the skills of scientific inquiry, as well as the curiosity, openness to new ideas and data, and skepticism that characterize science.
  • Teachers provide students with the time, space, and resources needed to learn science.
    • Create a setting for student work that is flexible and supportive of science inquiry.