Utah Core, 3rd Grade
Standard 4, Objective 1
Demonstrate that gravity is a force.
Demonstrate that gravity is a force.
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- Demonstrate that a force is required to overcome gravity.
- Use measurement to demonstrate that heavier objects require more force than lighter ones to overcome gravity.
Demonstration:
Use the following video to explain how a force is needed (the table) to overcome gravity (pulling on the rock.) Discuss what might have happened if we had tried to use a kleenex to hold up the rock, instead of the table.
Activity:
Bring in several objects of various weights. For example, you might have a penny, a large rock, a bag of flour, a dictionary, etc. Call kids up to the front to lift each of them in turn. Rank the objects in order of how much force we needed to apply on them to overcome gravity.
Essential Questions:
1. Why would you be unable to lift an elephant by yourself?
2. What are some things you do every day that overcome gravity?
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