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In this online game, learners attempt to send a rocket ship to various targets. Learners can adjust the angle and thrust of the rocket before it is launched.

free Ages 8 - 11 10 to 30 minutes
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Learners model the Sun-Earth-Moon system to show what causes the Moon's appearance to change when viewed from the Earth.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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Learners investigate why the Sun and Moon appear the same size in the sky even though the Sun is over 400 times larger in diameter.

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes