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Library of 3383 accessible STEM media resources.
Showing resources 21 to 40 of 48
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What is the difference between hydrosphere, lithosphere, and atmosphere? What gases make up the atmosphere? How many layers are in our atmosphere and what are their differences? After answering these and other questions, concludes with a quiz.
(Source: DCMP)
Experiments illustrate the presence and properties of: 1) saccharides (glucose and starch) in fruits and vegetables; 2) lipids (fats) in nuts and vegetable oils; and 3) proteins in eggs, meat, and milk. Emphasizes that chemistry is all around us.
Biology is the study of life. It encompasses the cellular basis of living things, the energy that underlies the activities of life, and the genetic basis for inheritance in organisms. Topics covered include the smallest components of living things: atoms, molecules, organelles, and cells. Part of the "Biology" series.
Presents three key concepts about chemical reactions and energy changes: exothermic and endothermic reactions, reaction rates involving temperature and concentration, and catalysts. Each concept is illustrated with a variety of experiments and computer animation to illuminate what is happening both visibly and at the molecular level.
A cycle or rhythm is a repetition of behaving in a regular pattern. There are many natural cycles for living and nonliving things on earth. Covers circadian rhythm (behavior based on a 24-hour cycle), annual rhythm (based on a yearly cycle), the water cycle, and the oxygen and carbon cycle. Highlights familiar examples of each. Quiz after summary.
Explains why the body needs regular supplies of air and how these get to the body. The camera follows the process of breathing through the ultra-thin membrane of the lung into the blood, showing how the varying demand for oxygen is met by the exchange of information between the brain and the chest muscles and how the body rids itself of carbon dioxide.
Diver Jill Heirnerth and a team of explorers and scientists explore the massive hidden underground rivers, caverns, and waters of the Floridan aquifer. The aquifer is essential for millions of people, and the team wants to study the impacts of generations of agriculture and urbanization. They are also checking the overall health of the aquifer.
Corals get much of their energy from symbiotic algae that live inside their cells. When ocean temperatures rise beyond a certain threshold, the algae’s photosynthetic machinery may be damaged and produce harmful reactive oxygen molecules. This animation shows how corals subsequently eject their algae in a process called coral bleaching, which causes the corals to turn white and often eventually die.
The concept of propulsive thrust to move objects over large distances is ancient. Yet, the technology to move an automobile forward or a rocket into space was invented less than two centuries ago. The invention of the solid fuel propulsion system combined with Newton's Third Law is the simplistic basis for modern rocketry. Students will review the history of propulsion and explore its use as a viable energy source of the future.
Hanna and Olli discover the wonderful world of trees. During their visit to a forest, they learn the importance of trees and the influence they have on the climate. While in the forest, they also learn the role trees play in the production of oxygen and the importance of preserving forests to retain the balance of nature. Part of "My Little Planet" series.
Scientists have long chalked up ocean mixing of salt, heat, nutrients, and gases, such as oxygen and carbon dioxide, to wind and tides. New research is investigating another possible contributor: krill. Mixing ocean water may seem like a big job for such a tiny creature, but krill are a force of nature when they migrate in giant swarms to feed at night. Part of the "Science Nation" series.
Turn light source on to explore. Observe what happens in the observation window as you set up different combinations of light source and molecule. Note this simulation is the first to support our zoom and magnification feature, so zoom in for a closer look, if you need to.
(Source: PhET Interactive Simulations)
Are humans the accidental products of an uncaring universe? Or are they the beneficiaries of a cosmic order that was planned beforehand to help them flourish? This documentary explores growing evidence from physics, chemistry, biology, and related fields that our universe was designed for large multi-cellular beings like ourselves. Geneticist and author Michael Denton investigates the special properties of carbon, water, and oxygen that make human life and the life of other organisms possible.
Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.
(Source: OpenStax)
With every breath you take, the process of respiration is supplying cells in the body with oxygen they need to carry out important processes. This program highlights the major structures and functions of the respiratory system. Concepts and terminology include: nasal passage, pharynx, larynx, lungs, diaphragm, trachea, bronchial tubes, alveoli, gas exchange, pulmonary circulation, inhalation, exhalation, hemoglobin, asthma, bronchitis, smoking, lung cancer, and pneumonia.
There is a massive southern ocean current almost two miles below the ocean's surface. Recent measurements found it’s the strongest current ever recorded at this depth and transports 40 times as much water as the Amazon River. The current carries dense, oxygen-rich water and has a direct influence on temperatures around the world. Part of the "News of the Day" series.
Follows the journey of a red blood cell around the circulatory system to demonstrate the efficient and elegant design of oxygen and food delivery to all parts of the body and the removal of wastes before they can do harm. Shows how the veins and arteries are structured to perform their tasks: muscular arteries to transmit the force of the heartbeat, veins with valves to insure the blood's return to the heart.
Algae play a vital role in the marine ecosystem. They provide food for all sorts of species, but in rare instances, they can also do harm. Harmful algal blooms occur when colonies of certain types of algae grow out of control and produce toxins that enter the food chain through fish and shellfish. Eventually, the toxins can kill larger marine animals like sea lions, manatees, turtles, and dolphins. It also makes shellfish unsafe for human consumption.
Climb aboard the Cyclops, a microscopic research vessel, and investigate an amazing hidden world on which all living things depend. The Cyclops houses a team of scientists known as the Micronauts and guides them through their discoveries of biological classification, diversity, and ecology. In this clip, the Micronauts explore the process of photosynthesis. They conduct experiments using paramecium by observing the green algae cells within its body. Through their experiments, they realize the in the presence of light, the green cells generate oxygen and food molecules. Part 2 of the Microscopic Monsters Series.
Showing collections 1 to 4 of 4
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
Biology related concepts
A collection containing 59 resources, curated by Benetech
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
