We introduce students to the concept that the movement of an object is always relative to something else. We call it "sunrise" but does the sun really rise? Can we stand still and move around from place to place at the same time? If a car is moving forwards, can it also be moving backwards at the same time? And can we throw a single ball towards the left and towards the right at the same time? The answers to all these questions will be answered and...

In a science lab, it's important to know how to take accurate measurements. This clip demonstrates how to: measure temperature using a thermometer, use an analytical balance, and measure the volume of a liquid using a measuring cylinder, taking into consideration the meniscus.

Follow our expert, high-profile panel of judges as they pick, rank and comment on THE GREATEST EVER‘s top ten tanks of all time; the ones that take you to the edge of armored experience and push the metal to the limit. Our team puts their picks through the paces, testing out their claims: we race a tank with a Volvo over 400 meters of rugged winter terrain and let a rock star take one out for a muddy ride. Our well-known, eclectic panel then debates,...

Metals have had such an impact on civilization that we name some eras for the discovery of specific metals: the Bronze Age and the Iron Age. In this program, learn about the characteristic and properties of metals, as well as the appearance of metals throughout history. We’ll explore prehistory; metals and tools; the first metals to be discovered; advantages of metal as compared to stone, wood, and bone; pure metals; alloys; heavy metals; iron;...

Sunscreen is a combination of organic and inorganic materials. This video identifies three types of ultraviolet light, the elements in sunscreen, and how sunscreen protects our skin from ultraviolet rays.

This film explores how echolocation/sonar works, in technology and in animals. This film explores how echolocation/sonar works, in technology and in animals. This film explores how echolocation/sonar works.....

In part one of this program, chemistry authorities, including "Helium Man" and two janitors, lay down the law-Boyle's Law, Graham's Law, and Dalton's Law. They also present the Kinetic Molecular Theory and the Ideal Gas Equation and elaborate on partial pressures and the difference between diffusion and effusion. Part two investigates kinetic energy; ion-dipole, dipole-dipole, and London dispersion forces; hydrogen bonds; phase diagrams; and vapor...

Using visual examples and basic calculations, this program defines and illustrates the concept of force, with an emphasis on the relationship between force and motion. Several kinds of forces are examined, including gravity, friction, and centripetal, centrifugal, magnetic, electromagnetic, electrostatic, and nuclear forces. The experiments and findings of Galileo and Newton are introduced as well.

Host Emily Calandrelli speaks to experts who are learning everything they can about asteroids and their potential impact on earth. From the dinosaur killer to the Chelyabinsk meteor of 2013 - we learn about the destructive power of asteroids. Emily takes a trip to the Ames Vertical Gun Range for an experiment that predicts impact size on the moon and the Earth. Emily also travels to Seattle Washington to meet a company that has a plan to profit from...

Orbital motion of satellites can be explained mathematically, but orbits of both of natural and artificial satellites do not always remain constant. This clip examines escape velocity and energy of orbital systems, including gravitational potential energy in radial gravitational fields in a variety of situations. Senior-level physics students will find it a valuable resource to enhance their understanding of energy in orbital systems.