New ReviewWater covers more than 70 percent of Earth's surface. Scholars learn about both freshwater and saltwater biomes in a simple presentation. They compare and contrast the differences in oxygen levels, food sources, and sunlight to better...

Will human population growth always be exponential, or will we find a limiting factor we can't avoid? Young scientists learn about both exponential and logistic growth models in various animal populations. They use case studies to...

As the reality of population decline across many species becomes real, pupils learn about the variables related to changes in populations. They complete a simulation of population changes and graph the results, then discuss limiting...

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.

Life has its ups and downs ... especially if you're an animal! Biology scholars engage in a population study through an inquiry-based instructional activity. Pupils work together to explore the factors that affect deer populations, then...

If any of the limiting factors in an environment change, both animal and plant populations also change. The video explains two different models of growth and the impact of limiting factors. It highlights the carrying capacity of an...

Bored with your current biome bag of tricks? This bundle is a bountiful bag of biome fun! Travel the globe with seventh graders and explore the biotic and abiotic factors that define our world's biomes. Then, introduce a little chaos to...

See how changes in initial populations and parameters affect a biological community. Individuals use a special software program to simulate a desert community with five species. They adjust initial populations to see how the community...

How large can a population become? The fifth installment of a nine-part unit teaches young ecologists about limiting factors that determine the carrying capacity of species in the Sonoran Desert. Here is a PowerPoint to help present this...

Moles are so important to chemistry that Michael Offutt composed an entire musical album titled Molennium about them. The video walks through how to use moles to solve a couple of different equations. It explains each step and when you...

What do you get if you cross ants with ticks? All kinds of antics! Video discusses the structure of the classifications in ecology. Then it covers the ways communities can be measured before discussing an example of leaf cutter ants and...

A video on logistic growth begins with a review of exponential growth before moving on to limiting factors. This naturally leads to a decrease in the growth rate and a discovery of carrying capacity. 

Living and non-living things are both a part of an ecosystem. A video begins with ecosystem interactions using biotic and abiotic factors. It also covers food webs, limiting factors, and logistic growth. As a real-world connection, it...

Warblers are small birds that have been known to get caught in spider webs. The video covers community ecology, focusing on the Competitive Exclusion Principle using the example of warblers. It also includes fundamental versus realized...

The total world population is predicted to pass 8 billion by 2025, which is less than 10 years from now. The video focuses on human population growth and the impact it has had and is having on our planet and other populations. It...

Biology grows on you. The presentation covers natural selection including genes, evolution, drug resistance, domestication, artificial selection, limiting factors, overpopulation, reproduction, adaptations, and alleles. It includes...

While 80 percent of people with West Nile Virus show no symptoms, in severe cases, it causes death by infecting the membranes around the spinal cord and brain. The video starts by making population ecology relevant. It includes density...

The final lesson in a two-part series prompts scholars to create newspaper articles and succession events. Applying their knowledge of the ecosystem and the past examples of succession, they predict what will happen in the future using...

One of the most recognizable commercial melodies was written in 1977, and led to gastronomical relief around the world. Scholars use Alka Seltzer tablets to measure reactants and calculate the chemical equation for the reaction of NaHCO3...

During this game, kids become migratory shorebirds and fly among wintering, nesting, and stopover habitats. If they do not arrive at a suitable habitat on time, they do not survive. Catastrophic events are periodically introduced that...

Elementary ecologists pretend to be migratory hummingbirds. They fly between wintering and nesting grounds, trying to reach a habitat haven. In a musical-chair fashion, some birds will miss out, and are removed from the game. To further...

Along came a spider, who sat down beside her. She screamed, but RJ wouldn't smash it because spiders are a limiting factor for other insects in an ecosystem. In this video, other common limiting factors for populations are listed....

A 12-page midterm exam sample can be given to young scientists in preparation for an exam. This particular installment is geared toward a class that delves into both ecology and chemistry concepts. There is no way to separate the 50...

The typical introductory environmental questions are asked in this two-page worksheet. Emerging ecologists define populations, limiting factors, carrying capacity, and trophic levels. They analyze a population graph and consider the...