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Learners investigate weight by building a spring scale. They observe and record how it responds to objects with different masses.

In this activity, learners design a bungee jump for an egg using nylon stockings.

In this activity (on page 6 of the PDF), learners plot the path of the sun's apparent movement across the sky on two days, with the second day occurring two or three months after the first.

In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping.