Onr: Saltwater vs. Freshwater, Which Is Denser?

Ride the wave to an understanding of refraction! The first in a series of two inquiry-based lessons challenges learners to create transverse waves with two different types of springs. As their wave hits an object, they observe the change...

Through two investigations, life science learners determine whether or not yeast is alive. They perform tests for metabolism by providing sugar and observing if gas is produced as a byproduct. They incubate some of the sample for at...

This complete worksheet includes short answer and multiple choice questions as well as a Venn diagram for comparing and contrasting mitosis with meiosis. Separate teachers' instructions are supplied. This could be used as homework and is...

Both ionic and covalent bonds present as strong bonds, but which is stronger? Socratica presents a video from its chemistry playlist that attempts to answer this question. It addresses how strength is measured and the range of strengths...

Take Newton's second law of motion to a new level by considering an un-acceleratable object with infinite mass. The idea is mind-blowing, but it is thoroughly explored in this clever video clip! Challenge your high school physicists by...

This particular lesson was written by the National Earth Science Teachers Association, but density is a concept that you can teach at the beginning of the school year in your life, physical, or earth science classes. It would be fun to...

This site, which is provided for by the University of Massachusets, gives a very good example of a typical bivalve reproductive cycle.

A video lesson highlighting an Sn2 reaction which is an inversion of Stereochemistry. [10:01]

One in every seven people suffer from a lack of basic food. Our Hungry Planet introduces this complex issue in the second lesson of an interesting 13-part unit. It discusses the space needed to grow and raise food, the transportation of...

Students read the article "The Sixth Extinction" by Niles Eldredge on past mass extinctions and the current rate of loss of species. There is a choice of student activities which includes having students respond to discussion and...