This Caldecott Medal winning book poetically reveals the life of the photographer and farmer, Wilson Bentley. From the time he was a small boy, Willie was fascinated by snowflakes.
The Mind's Big Bang - 60 minutes
Between 100,000 and 50,000 years ago, something happened that triggered a creative, technological and social explosion, allowing humans to dominate the planet. What forces may have contributed to the emergence of the modern human mind?
Includes: 1: Newton's Law - Rest Inertia of Massive Ball; 2: Newton's 2nd Law - Effects of a varies net force on a body's motion; 3: Newton's 3rd Law - Reaction Cart/Projected Ball Bearings; 4: Terminal Velocity - Air resistance acting on a free-falling body; 5: Motion of Center of Mass - system with internally moving components; 6: Motion of Center of Mass - Projected boomerang and tennis
Demonstrations include: 1: Mechanical Resonance - Forced Vibrations with Single Coupled Oscillators; 2: Velocity, Wavelength, and Frequency Reflected Waves - Transverse Waves on a Coil Spring; 3: Change in Medium /Interference - Transverse Waves on a Coil Spring; 4: Transverse Standing Waves - Vibrational Modes on a String; 5: Longitudinal Waves - Propagation/Interference of Longitudinal Waves
Demonstrations include: 1: Nature of Sound and Waves - Sources and Propagation of Sound; 2: Propagation of Sound - Direct Measurement of the Speed of Sound in Air and Metal; 3: Transmission of Sound Through a Medium - Attenuation of Sound in a Vacuum; 4: Refraction of Sound - Carbon Dioxide Sound Lens; 5: Interference of Sound - Sound Divided into Paths of Differing Length; 6: Interference of
Demonstrations include: 1: Standing Sound Waves - Resonating Air Column with Cork Dust; 2: Standing Sound Waves - Resonance with Illuminating Gas in Flame Tube; 3: Standing Sound Waves in Two-Dimensions - Illuminating Gas in a Resonating Cavity; 4: Vibrations in a Two-Dimensional Surface - Chladni Plate; 5: Resonance/Real-Time Strobe Holography - Resonant Modes of a Vibrating Bell; 6: Quality
Explores the people, ideas, and inventions behind the major scientific breakthroughs in astronomy, physics, anatomy, and mathematics. Examines scientific greats including Galileo, Kepler, and Brunelleschi, and discusses how the life of a scientist often conflicted with existing religious beliefs. DVD divided into chapters. Includes discussion questions and Spanish soundtrack option.
Contains 3 episodes, each about 30 minutes in length. In each episode, a team of scientists that includes biologists, chemists, and physicists are transported to an isolated island where they must work together to solve challenges using mainly indigenous items.
Includes 3 episodes, each about 30 minutes long. In each program a team of scientists that includes physicists, chemists, and biologists and botanists are transported to an isolated island where they must work together to solve challenges using only rudimentary tools and indigenous materials.
Contains 4 programs, each around 30 minutes long. In each program, a team of scientists that includes biologists, chemists, and physicists must work together to solve challenges using only rudimentary tools and indigenous materials.
Learn about electricity when Ben Franklin leaps out of the pages of a student's science textbook to help him with his homework. Using the latest computer graphics and experiments, Ben explains concepts such as lightning, static electricity, and simple, series, and parallel circuits.
This program helps students learn the principles of sound, the range of human hearing, and significant terms as they discover the science behind everyday sounds. Travel deep into the ocean and high into the skies in search of creatures who use echolocation.
When "Hardware Hal" holds a "Simple and Compound Machines Sale" he demonstrates to his assistants the six simple machines: the lever, wedge, inclined plane, pulley, wheel & axle, and screw. Shows how these machines make work easier by changing force, direction, or distance.
