Passive Solar Water Heating

A bucket cut in half lengthwise, lays on its side. The inside of the bucket is lined with aluminum foil.  Inside the bucket is a clear plastic bottle. Inside this bottle is a capped dark black bottle.
Learning Goals

Learning Goals:

  1. Students will cover/manipulate milk jugs to achieve the most solar energy absorption.
  2. Students will calculate the joules of energy absorbed by the solar heated water.
  3. Students will measure and graph the temperature changes of their solar milk jugs.
  4. Students will gain an understanding of the amount of energy in sunlight.
Materials List

Handouts

Classroom Supplies

  • Thermometer (recommended: electronic probe thermometer)
  • Black spray paint
  • Masking tape
  • Aluminum foil
  • Miscellaneous colored paper (needs to include: black, blue, green, yellow, and white)
  • Measuring pitcher (1 liter)
  • Graph paper
  • Milk jugs (1 gallon)

Important Links

Next Generation Science Standards

Next Generation Science Standards

  • MS-PS3-3. Apply scientific principles to design, construct, and test a device that either minimizes or maximizes thermal energy transfer.
  • MS-PS3-4. Plan an investigation to determine the relationships among the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample.
  • MS-PS3-5. Construct, use, and present arguments to support the claim that when the kinetic energy of an object changes, energy is transferred to or from the object.
  • HS-PS3-3. Design, build, and refine a device that works within given constraints to convert one form of energy into another form of energy.

Lesson 1 of 3 / Time: 1-2 periods

Students will retrofit milk jugs to absorb and retain the most solar energy. This process involves students collecting data that measures the impacts of different variables on the solar energy absorbed by each collection device. Students should be able to see patterns in both the absorption and retention of heat by various types of designs. During this activity, students will build background knowledge to help them apply these concepts on a larger scale.

 

Bioreactor Water Heating

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