Curated OER
Viruses and Bacteria
A series of questions about archaebacteria and eubacteria reinforce a chapter on viruses and bacteria. This worksheet is from chapter 18 of an unspecified textbook, but could work with your biology lecture as well. High schoolers...
Curated OER
Rotation Velocity of a Galaxy
In this orbit of stars in galaxies learning exercise, students are given an equation that models the orbital speeds of stars as they relate to their distance from the nucleus of a galaxy. Students solve 5 problems using this equation and...
Curated OER
Science Kids: Science Images: Fraser Spiral Illusion, False Spiral
This optical illusion image is known as a Fraser spiral illusion, or false spiral. The black arcs appear to form a spiral when in fact they are a series of concentric circles.