Meet eight species with surprising defenses, including hagfish that release suffocating slime and African hairy frogs that poke their rear toe bones through their skin to create claws.
In the animal kingdom, survival is the name of the game - and not everything is as it seems. A number of animals rely on particularly clever tricks to fool predators or prey. Find out more about some of nature's most bizarre and bloodthirsty con artists and meet the scientists who are working to figure out just how they pull off their amazing tricks.
Explores the explosion of the Chernobyl Power Plant on April 26, 1986, in Northern Ukraine, and discusses the long term effects of radiation on wildlife in the Exclusion Zone that was abandoned after the accident.
Describes the climate, seasons, plants, animals, and soil of the boreal forest, a biome or land zone, which stretches across the northern parts of North America, Europe, and Asia.
Takes readers on a walk through a tropical rain forest, showing examples of how the animals and plants depend on each other and their environment to survive.
Describes the climate, soil, plants, and animals of North American deserts and the ways in which the plants and animals depend on each other and their environment to survive.
Overview of the respiratory and circulatory systems, with an explanation of how these systems bring oxygen to the body's cells and carry wastes away. Explores the major parts of each system and describes how scientists are working to find replacements for what fails or wears out.
The student will learn to identify chemical changes and the signs that they have occurred. Introduces how to distinguish between physical and chemical changes, and the concept that chemical reactions involve changes in energy. Identifies factors that affect reaction rate. Explains the role of enzymes in chemical reactions. Describes the importance of chemical reactions in daily life.
