New ReviewMost fish freeze to death when the water is too cold, yet some fish live in the Southern Ocean where the water is often below freezing. Scholars use two models representing the blood from most fish versus the blood from Antarctic fish....

Is there life on Mars? Is it likely? A video lesson analyzes the possibility of life on Mars. The discovery of water on Mars changes how scientists think about the likelihood of life on the red planet. Part of the SciShow Space series,...

Can complex life develop in an oxygen-depleted environment? Scholars listen to a discussion of the topic between two people: one interested in science without studying it and one working on a doctoral degree in science. The fourth video...

Is your class in the dark about photosynthesis? Shed some sunlight on an important biological process with a thoughtful activity. After answering questions to help determine their level of knowledge, learners work with chemical equations...

Is your class ready to size up the topic of diffusion? Help them get cell shape savvy with a well-written handout. The resource covers how substances such as oxygen passively move through the cell membrane and how cell size and shape...

How does energy from the sun make plants grow? Scholars move step by step through the processes that promote plant propagation during a detailed lesson. The resource illustrates ADP production and hydrolysis, then allows learners to...

Earth didn't always have oxygen, so what caused the change that allows humans to live here? Learn about the change in O2 levels throughout geological history through an interactive graph. Each section offers greater detail on the changes...

Was Earth born as a Blue Planet? Discover where water came from with a video from an intriguing science playlist. The resource covers the three most likely origins of water, how scientists differentiate between comet and asteroid water,...

What is coral bleaching? Tackle a trendy topic with a narrated animation. Through a combination of video and illustration, the narrator introduces viewers to a coral reef, then goes inside a coral polyp to show its symbiotic relationship...

Take it all the way back! Young scientists discover the changes that took place from the time Earth became solid to present day through an interesting interactive. The resource guides users through key events that have shaped our world...

When you get to the heart of the matter, you learn a lot about an organism by studying its circulatory system! A perfect resource for a zoology or anatomy class, the simulation gives users a peek inside a variety of vertebrates to...

Do animals breathe faster when given more oxygen or more carbon dioxide? Young scientists observe the respiration rates of locusts under a variety of gas concentrations to answer that very question. They collect data, analyze the...

Finally, a photosynthesis activity that outshines the rest! Young biologists perform an experiment that allows them to observe photosynthesis through the production of oxygen. The lesson, part of the K20 series, also includes a study of...

Life before the dinosaurs was pretty amazing—and very fragile! Discover what Earth was like for Cambrian creatures, from the smallest ocean-dwellers to the first land animals. A video from an extensive biology playlist explores how early...

A stroke can severely impact a patients' speech, motor skills, and quality of life—if they survive the event in the first place. Learn what happens to the brain during a stroke, and how you can help if someone you see is experiencing a...

We breathe oxygen, yet it is only 21 percent of what is in our air. The four gases found in air each have their own chemical formula and abundance. Increasing in difficulty, four puzzles review these properties.

Oxygen has many important properties ... such as sustaining most living things. But magnetism? Discover the behavior of oxygen in its chilly liquid form using a video from a larger playlist on physics. Watch as liquid oxygen is poured on...

Get big results out of a small-scale lab! Young chemists observe the electrolysis of sodium sulfate using a microscale experiment. A colorful indicator solution combined with the production of gas bubbles yields a variety of observations...

Finally, an electronegativity resource your class will be strangely drawn to! Skilled scientists manipulate interactive puzzles to gain an understanding of common electronegativity values. The great thing? You can conduct the lesson...

Do your chemistry scholars know their esters? Introduce the class to the nomenclature and structural formulas of common esters through thought-provoking games. Individuals or pairs of pupils match the name with the formula before using...

Cross-country skiers are some of the most disciplined athletes in the world. Young scholars learn about the biology of endurance in an interesting video lesson that highlights athletes of current and past Olympics.

Oxygen appears blue in both the liquid and solid states. The eighth video in a playlist about chemical elements discusses oxygen as both a gas and a liquid, and multiple demonstrations show the properties of oxygen.

It's the stuff of life! Where would we be without CHNOPS? Biology scholars discover the elements essential to life with a video from an engaging biology playlist. Topics covered include lipids, proteins, and DNA, as well as the trace...

If most gases are invisible, how do we know so much about them? Pupils practice associating the name, formula, testing method, and outcome for four common gases using an interactive. Users build on the content of their first puzzles to...