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Main Curriculum Tie:
Background For Teachers:
When a hot substance comes in contact with a cold substance, the heat energy will flow from hotter to colder until the objects become the same temperature.
Insulators are materials that block the flow of heat, while conductors are materials that allow heat to flow easily. Sometimes students believe that insulators are really heat sources, because they seem to make things warm, or heat things up. Insulators will stop the heat from flowing, so things that are warm tend to say warm. but they are not a heat source. Good insulators include plastics, air, fabrics that hold air, feathers, or other similar materials.
Intended Learning Outcomes:
Invite a student to come to the front of the room, and hand the student an ice cube to hold (can be put in a sealable bag). Ask the student what is happening. Clarify that the ice is not bringing cold to the hand, but that the heat is moving from the warm hand to the ice cube, until eventually they become the same temperature. When their hand is cold, sometimes people also believe that it is their gloves that keep them warm.
Homework & Family Connections
Another assessment is to use the Heat Story worksheet (pdf) and have students write what they know about heat.
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