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Unit Plan
BBC

Bbc: Gcse Bitesize: Mass, Weight and Gravitational Field Strength

For Students 9th - 10th
This lesson focuses on gravitational fields and includes what one is, the formula for gravity force, defining weight, formula for mass, an example of how to calculate gravity force, a practice question, and a link to a test.
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Unit Plan
CK-12 Foundation

Ck 12: Fifth Grade Science: Earth Science: Gravity

For Students 4th - 6th
Do you know how gravity affects you? This module defines gravity and explains how gravity affects the motion of objects.