Curated OER
Beans and Birds: A Natural Selection Simulation
Students examine the problem concerning the evolution of seed color in pinto bean plants "How does natural selection change the frequency of genes or traits over many generations"? Students work in teams to design an experiment that...
Curated OER
ESL: Journalism Article Comprehension
In this ESL comprehension instructional activity, learners read a passage, then complete a variety of warm-up and pre/post reading activities. Homework suggestions are included.
Exploratorium
Exploratorium: Science Snacks: Conductivity Meter
Create a conductivity meter with everyday materials in this activity. This conductivity meter is portable and allows students to test the conductivity of liquids easily.
TeachEngineering
Teach Engineering: What's the Conductivity of Gatorade?
Students use conductivity meters to measure various salt and water solutions, as indicated by the number of LEDs (light emitting diodes) that illuminate on the meter. Students create calibration curves using known amounts of table salt...
TeachEngineering
Teach Engineering: Should I Drink That?
Students perform the first steps that environmental engineers do to determine water quality - sampling and analysis. Student teams measure the electrical conductivity of four water samples using teacher-made LED conductivity testers and...