Curated OER
Acid Rain
High schoolers investigate the quality of water using a variety of methods. They use a pH probe to measure the pH and study the effect of dissolved CO2 in the water. Students also observe the effect of the pH upon the dissolving of H2SO4...
Curated OER
Hybrid Automobiles
Learners explain the basic principles of gasoline engines as propulsion for vehicles. They cite reasons why alternatives for gasoline engines are being considered and explain differences between a motor and an engine.