Curated OER
Extraction of DNA from Onion
Students experiment with DNA by isolating it from plant tissue. They investigate whole onions to prepare DNA. They complete the experiment to examine the structural characteristics of DNA.
Curated OER
Is It Hot in the Light?
Third graders make observations about the temperature of items in direct sunlight. In groups, they discuss why asphalt, brick and cement are warmer than items surrounding them. To end the lesson, they examine how heat transfers energy...