This video is a lecture on echo sounding, a technique used by ships to locate objects beneath the surface of water. The video explains how ultrasound is partially reflected at the boundary between two different media, which is used to...

Now that we've learned about the layers of the ocean, let's focus on the floor. How did oceanographers learn about the composition of the ocean floor? What is sediment? How do different types of sediment get to the ocean and what...

Monitoring Heart Rate

Ever wonder what causes the thump-thump sound of your heartbeat? It’s all to do with the valves. The sound of your heart beating can be attributed to your valves closing, and always in specific pairs. Separating the atria from the...

This video explains the concept of classical conditioning, using Ivan Pavlov's famous experiment with dogs as an example. It also explores how the brain processes and forms associations between stimuli and responses, and includes a...

Twist and Pulse, Britain's Got Talent runners-up and inventors of a unique combination of street dance and comedy, are attempting to break their own Guinness World Records title for the most synchronized dance moves in 30 seconds. Use to...

HST-CNA - Blood Pressure

This series of videos investigates the meaning of ratios and rates. Special emphasis is given to the processes of comparing ratios and simplifying ratios. Real-life examples help students comprehend these often hard-to-teach concepts.