Sometimes animals and plants cannot get enough oxygen to respire aerobically, such as during intense exercise, but they still need to respire to survive. After all, everything relies on respiration for energy. Luckily there is a back-up...

In the first part of this video we looked at diffusion to move gases and osmosis for the movement of water, from high concentration to low concentration down their concentration gradient. Active transport works in the opposite...

Real World Science : The Science of Climate Change
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This program begins by explaining how scientists have learned that Earth’s climate has changed many times over billions of years and that Earth’s climate is...

This video explains the concept of global warming and the greenhouse effect. It discusses how human activities have contributed to the increase in greenhouse gases and the consequences of global warming. The video also provides tips on...

In this video, the speaker explains the concept of environment and its various components, including living and non-living organisms. They also discuss the four spheres that make up the planet Earth and how human activities are affecting...

Este programa de video de accion en vivo es sobre la palabra orbita. El programa esta disenado para reforzar y apoyar la comprension y retencion del estudiante de la palabra orbita mediante el uso de secuencias de video, fotografias,...

In this video Paul Andersen explains how the global climate is changing as a result of natural phenomenon and human actions. Changes in the solar radiation due to variations in the Earth's tilt and orbit have caused the ice ages. ...

Ever wondered why feel all stiff the day after doing lots of exercise, in order for you to contract your muscles they need the energy that is released in respiration. However, when you're doing heavy exercise for a long time the muscles...

Jeff Remington is a finalist for the Global Teacher Prize and one of ten National STEM Teacher Ambassadors from a program administered by The National Science Teachers Association (NSTA) and the National Council of Teachers of...

Engineers investigating impact of krill swarms on ocean mixing, and possibly global climate



Scientists have long chalked up ocean mixing of salt, heat, nutrients and gases, such as oxygen and carbon dioxide, to wind...

This video discusses the impact of human activities on the Earth's environment. It covers topics such as deforestation, air pollution, depletion of the ozone layer, and global climate change. The video also highlights the ways...

This video provides an introduction to El Nino and La Nina, two climate patterns in the Pacific Ocean. It explains how these patterns occur, their impacts on global weather patterns, and discusses whether 2021 and 2022 are El Nino or La...

In this video Paul Andersen explains how fossil fuels are formed when organic material is heating and squeezed in an anaerobic environment. Formation, extraction, advantages, and disadvantages are discussed for coal, petroleum and...

When Geologist Jeff Donnelly of the Woods Hole Oceanographic Institution (WHOI) hunts for hurricanes, he does it safely at ground level, or just slightly below. He is even able to do it without having to encounter so much as a drop of...

We’re in the middle of a rapid, unprecedented, and world-changing increase in the intensity and scale of human activity on this planet.

Learn more about the major kinds of pollution in this infographic explainer.

Some birds steal food from other birds to save themselves work, but kleptopredators take it one step further! We're conducting a survey of our viewers! If you have time, please give us