Uphill Battle

WHY?

Gravity is a force that exists between any two objects. It acts to pull the objects together. In the experiment with the wheel and the marbles, the center of gravity falls as the wheel rises up the cardboard ramp. Gravity makes the speed of falling objects increase at the same rate, whatever their weight. The size of the force of gravity that pulls an object down is the same as its weight.

ASSESSMENT: Can the student communicate what they observed?

question_guy

four Student is able to communicate the reasoning of how as the center of gravity falls it makes the wheel roll up the cardboard. Student can also describe how gravity affects them everyday.

three Student is able to communicate most of the reasoning of how as the center of gravity falls it makes the wheel roll up the cardboard. Student can also describe how gravity affects them everyday.

two Student is able to communicate some of the reasoning of how as the center of gravity falls it makes the wheel roll up the cardboard. Student can also describe how gravity affects them everyday.

one Student is able to communicate one of the reasons of how as the center of gravity falls it makes the wheel roll up the cardboard.

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Last modified: Tue Mar 24 16:25:04 PST 1998