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Matter exists as elements, compounds and mixtures. But what are the differences between these three forms? Using straightforward images and diagrams and commonplace examples, this video introduces students to how elements, compounds and mixtures are formed, how they bond and combine, and if and how they separate. Succinct and clear, this is essential viewing for students of chemistry. Show Less
Water vapour is the most abundant greenhouse gas: more of it means more extreme weather.
The most effective policies for cutting emissions from the electricity and transportation sectors, the two largest sources of CO2e.
Atmospheric scientist Dr Jennifer A Francis explains that the rate of temperature rise we are experiencing is unprecedented and can only be caused by human activity.
In order to survive, every form of life needs to be adapted to its habitat. A ‘habitat’ is the environment or place where an organism lives. And being ‘adapted’ means being well suited or fitted to live there. Otherwise there is no future for its kind. It must adapt or die. This programme looks at a wide range of organisms in the sea. It outlines their basic needs. It introduces the concept of an ecosystem and a food web, the main marine habitats, the basic structure of classification, and gives a simple explanation of evolution. Show Less
Satellite footage, telescopic photos and animation are used to teach students about the many fascinating aspects of our solar system. Viewers are introduced to ancient astronomers, telescopes, observatories and space exploration. Students will discover exciting facts about planets, orbits, gravity, revolution and rotation. The programme also features discussions of the sun, comets, asteroids and meteors. Show Less
This visually exciting programme explores the world of rocks and minerals and shares what he learns with viewers. Combing animation with live video footage, the programme demonstrates how rocks are formed and how they change. Students will learn to identify common minerals and identify properties of rocks. Show Less
Astrophysicists have discovered what is essentially a second solar system, containing seven planets - which is more than any other known planetary system - and three of the planets have orbital periods of 331, 211, and 60 days, similar to those of Earth, Venus and Mercury. Team leader Juan Cabrera says, "we cannot stress just how important this discovery is. It is a big step in the search for a 'twin' to the Solar System, and thus also in finding a second Earth." Read the full story here: http://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10081/151_read-8560/year-all/#gallery/12713 Show Less
Exploring the effects of objects passing through Saturn's ring.
NASA's two most recent videos of our moon are absolutely amazing. One is a simulation of the moon's evolution and the other is a narrated history of the rock.
For the first time, astronomers captured, from start to finish, a black hole consuming a star. This is a computer simulation of that event.