Wk.#5: Heat & Energy

Week #5: Heat & Energy

Objectives

  • Describe a change of matter state using a particle model
  • Identify examples of thermal transmission by conduction, convection, and radiation
  • Recognize that some materials conduct heat
  • Describe examples of materials and devices used to control personal heat
  • Construct and test a tool used to safely handle heated objects
  • Conduct an investigation on the flammability of materials
  • Apply collected data to construct a candle and prepare s’mores

Activities

  • Learners discussed examples of materials and devices used to protect people from extreme heat and cold.
  • Learners shook a particle model representing changes in states of matter.
  • Learners performed a simple experiment showing that as a candle burned, it consumed gas (oxygen).
  • Learners constructed and tested tools to safely hold materials over an open flame.
  • Learners tested materials for how quickly they ignited or heated up.

  • Learners attempted to convert a crayon into a candle using the results of the previous burn tests.
  • Learners prepared a s’more using the previously tested techniques for safely applying heat.

Questions to Discuss

  • What are examples of devices that provide heat by conduction, convention, and radiation?
  • How did the energy required to shake the particle model change between using it to represent a gas and then a liquid?
  • Based on how much space was filled by the bouncing particles in the model, what would you expect to happen to the volume of a solid if it was heated to a liquid and then a gas?
  • What three materials were easiest to catch fire?
  • What is your theory as to why the thick pasta noodle was harder to burn than the skinny pasta stick?
  • What materials did you try using to act as a wick for your candle? Which one worked the best?

Things to Try at Home

  • Make a list of devices in your house that use energy. Talk to an adult about how much energy your household uses in a month. What are some sources of that energy being used?
  • Find examples of devices that protect from heat or handle hot materials. What kind of materials are they made from? Do they help protect from anything else?
  • Many sources of energy are associated with side effects and impact on the local environment. Search for what these concerns are for at least one energy resource (coal, wind, nuclear, oil, natural gas, solar, etc.) and explain with words, pictures, or video what these concerns are and why you do or do not think the benefit is worth the cost and impact.

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