Finding and Measuring What You Can't See

Fascinating aspects of electromagnetic radiation and its use in obtaining and transferring information are described here. Learners will find the connections to current technology interesting. Although the slides are text-heavy, they do...

Many assume light intensity decreases proportionally to your distance from the sun. An interesting video discusses why this isn't true and what actually happens. It shares the flashes of light people would observe and then compares what...

DNA forms a double helix, but that is not what it looks like. A fact-filled video takes on this inaccuracy as part of an extensive playlist on biology. It shares the recent discoveries about what DNA looks like as well as the many...

How do we see what we can't see? An episode of a comprehensive physics playlist shows images of the smallest particles current technology can record. The instructor discusses current and past research on the makeup of subatomic particles.

It's looking like the dark side is bigger than we thought! Physicists speculate that perhaps 96% of the universe consists of invisible dark matter and dark energy, while only 4% is what we can view with the aided eye. This flabbergasting...

What will viewers see when they watch this video about vision? They will observe RJ and Sam hanging out during a power outage with Rookie, the dog. The boys discuss the structure of the eye (pupil, iris, cornea, lens, retina, optic...

In a math or life science class, "mini-me" models are created with cardstock to reflect a 1:10 scale of students' bodies. Learners measure each others' heights with meter sticks, and then reduce the size by 10. After this exercise, they...

Ever find yourself looking at a clear blue sky and notice something that seems to be floating across your eye? Well, you're not alone. Watch this short video to find out exactly what causes this and other common visual phenomenon.

Viewers consider shrinking down to the size of the nanoscale. With fairy-tale-like animation and narration, they imagine what they could see if they were 1,000 times smaller than a red blood cell! Use this clip in any class where you...

Teams learn about the size of a nanometer by measuring objects and converting those measurements. A worksheet then tests the groups' abilities to use nanometers by having them determine the size of objects that are too small to measure.