What happens when a new predator comes to town? Learners analyze an experiment that studies the effect of predation on selection. They use real data to draw conclusions about the impact a new predator has on a prey species.

The sustainability of an ecosystem depends on many factors and changes constantly. Young scholars consider these factors as they use a set of cards to create food webs. They review key scientific vocabulary such as predator, prey,...

The rock pocket mouse exists either with light colored or dark colored fur. As their habitat changes from sandy desert to lava flows the prominence of each color fur also changes. Viewers compare the visibility of each mouse's fur color...

Should gray wolves be removed from Yellowstone National Park? After researching the complex relationships between the various habitats and species at Yellowstone National Park,  including humans, class members take a position on the...

In an invertebrate beauty pageant, why do millipedes always scuttle away with the crown? Part four of a five-part series of Invertebrate videos compares and contrasts the millipede with the centipede in terms of diet, behavior, and body...

What animal is only eight inches long and can easily kill an adult human? The blue-ringed octopus changes body color before neutralizing any threat, human or not. Observe the drastic changes to body color in a short video.

Anemones contain harpoon-like structures in their tentacles to attack prey. A video shares an up-close look at an anemone eating a goby. It highlights the attack, capture, and demise of the prey through a system evolved over the course...

The first animals to have muscles, nerves, mouths, and stomachs evolved into a diverse group of cnidarians. Individuals learn about the evolution of these anemones. A video shares how they catch prey and defend their habitat, as well as...

While most sea anemones move slowly along rocks, Stomphia swim to escape predators. Viewers see a sea star sneak up on an anemone ready to attack. The unsuspecting anemone retaliates quickly and swims away awkwardly as part of a larger...

Over millions of years, bats developed flight and echolocation, so why are some bats now walking to look for food? An interesting video explains the changes in predator and prey relationships due to adaptation. Which adaptation is the...

Talk about a sticky situation! What is spider silk, anyway? Scholars scope out the science behind one of the world's strongest substances through a video from an intriguing science series. A leading spider scientist discusses the types...

In the ecological game of who eats who, one small change can have a big impact! Individuals create food chains in an array of ecosystems, then determine what happens to organisms in the chain when one organism changes its feeding...

What happens when the top predator on an ecosystem disappears? Scholars explore this idea through an introduction example and four case studies. They learn to analyze the importance of every member in a food pyramid to come to their...

It's a jungle out there! Young biologists journey to Darien, Panama to examine the intricate relationships between the organisms that inhabit the jungle. Groups begin by demonstrating an understanding of energy flow in ecosystems, then...

It's not every day that you end up rooting for a mouse. A breathtaking video takes scholars to the American Southwest to learn about the rock pocket mouse. It describes how mice with black fur had an evolutionary advantage in the dark...

Animals and plants develop relationships and rely on each other to survive. Pupils learn more about symbiosis through a video, a hands-on matching activity, and a game. They differentiate and describe each type on a written evaluation.

What are ecological relationships? Well, it can be complicated! Paint a clear picture for pupils with a fun and informative video. It explains and illustrates each relationship thoroughly, from pesky parasites to snuggly symbiotes.

How did scientists unravel the mystery of an ancient beaver species? An engaging video from a well-written biology playlist discusses the discovery of strange spiral fossils found in Nebraska farm country. Junior paleontologists examine...

Meet a tiny shrimp that packs quite a wallop! Get to know the mantis shrimp and the amazing one-two punch it delivers to prey with a video from an engaging physics playlist. Junior biologists examine fun shrimp facts, such as why it has...

Every species competes for food. The video explains interspecific competition, intraspecific competition, and the competitive exclusion principle as a part of predator-prey relationships. It also covers resource partitioning and the...

Water striders ... amazing aquatic acrobats or ferocious predators? Introduce life science scholars to these tough little insects using an engaging video. The narrator explains the strider's ability to walk on water and how it uses this...

Humans are predisposed to fear snakes. Through evolution, many animals developed a visceral reaction to snakes as a defense mechanism. An engaging video lesson describes the evidence and how scientists came to this conclusion.

Examine the benefits of chemical defense mechanisms. Organisms in oceans use chemicals to ward off predators. Duplicate this adaptation using a hands-on experiment in which you ward off your predators (your pupils) with some bad-tasting...

Examine predator-prey marine relationships through an interactive lesson plan design. Learners begin by studying a specific shark species and then analyze real-time shark-tracking data. They also study threats to shark populations and...