DVD

Viewers will see that chemical bonds are the key to understanding how elements combine. The differences between ionic and covalent bonds are clearly presented using vivid graphics and dynamic footage. Students see how valence electrons interact among atoms to form compounds, and learn how simple Lewis structures can help describe how easily an element will react.

"Biomes of the World in Action" is a fun, informative series that takes students on a fast-paced eco-adventure around the world exploring the many characteristics that make these large regions of the world different from one another.

From the arctic tundra found in the Polar zones to the regions of alpine tundra located on the mountaintops of Europe and North America, students will get an up-close look at this fragile biome. Students explore the biodiversity that exists in these frozen expanses, while a fun, hands-on experiment demonstrates why so many tundra plants are dark in color.

Students will discover how the species of the rainforest have adapted to the temperature and humidity, and why the threat of its destruction will have a far-reaching impact on our planet.

"Biomes of the World in Action" is a fun, informative series that takes students on a fast-paced eco-adventure around the world exploring the many characteristics that make these large regions of the world different from one another.

Students will explore saltwater environments -- from shorelines to coral reefs -- and learn about the fish, plants, mammals and insects that depend on each other for survival in this aquatic biome. Examine concepts such as salinity and currents, and find out about the three major life zones found in ocean waters.

"Biomes of the World in Action" is a fun, informative series that takes students on a fast-paced eco-adventure around the world exploring the many characteristics that make these large regions of the world different from one another.

"Biomes of the World in Action" is a fun, informative series that takes students on a fast-paced eco-adventure around the world exploring the many characteristics that make these large regions of the world different from one another.

"Biomes of the World in Action" is a fun, informative series that takes students on a fast-paced eco-adventure around the world exploring the many characteristics that make these large regions of the world different from one another.