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Educational Level:
Youth public  
Materials Cost:
$1 - $5  
Topics/Subjects:
Engineering and technology  
Resource Type:
Instructor guide/manual  
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Using different perspectives- the unaided eye, a magnifying lens, and a satellite- provides different information. Children make observations of common objects- along with images of butterflies, the Mississippi River, a fire in the Colorado Black... (View More)

In this activity, students experiment to test the hypothesis that Mars was once hotter. The activity requires some advance preparation by the teacher: the day before the activity, need to place a plastic bottle filled with water in the freezer.... (View More)

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