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Elementary (Grades K-2)
Elementary (Grades 3-5)
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The nucleus of some atoms is unstable and may spontaneously decay.
All living and non-living things are composed of matter having characteristic properties that distinguish one substance from another.
When matter undergoes a chemical change it turns into a new and different substance whose properties are different from the original. No matter how substances interact with one another, the total mass of the system remains the same.
Everything is constantly moving; motion is relative, but the motion of an object can be described and predicted by tracing and measuring its position over time.
Force is an influence that can change the motion of an object.
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