Investigating convex lenses is a great place to begin or continue your study of optics. Compare a study of convex and concave lenses seeing how they're alike and different. Which can make real images, which can cast a shadow? Compare convex lenses to pinholes and see how they are similar and different. These are four simple and easy experiments that require little prep. Kids will be intrigued by the phenomena and want to dig into the concepts. The instructions are written to students which frees you from introducing the lab if you prefer. Labs could be used at a station or center as well. The first lab in the series has a student reading. All four labs come with CER (Claim, Evidence, Reasoning) cards that can be used in a variety of ways (instructions for use are included).
Use this to learn and reinforce answers to questions such as:
Once students try this activity, they can capture their observations using the included Lab Notes or probing questions included in the instructions.
Answer Keys and Teacher Notes address most questions and issues that might arise in this study—you shouldn’t have to do any outside research unless you want to.
Materials Needed Votive candle or small light, Assorted convex and concave lenses, Matches or Lighter, Metric measuring tape, Clear lightbulb, Frosted lightbulb, Screen or light wall, Pushpin, Foil, Scissors, Desk lamp, Tape, Cardboard frame.
Prep Needed Gather supplies
Teaching Time Four 30 min sessions
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