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Some things die and decay and others don't. A walk in the park teaches that leaves, logs, and animals are examples of things that decay or rot. An elementary class buries apple, potato, and banana skins, bread, a plastic tray, and an aluminum can. They learn what decays and what will not. Some things that don't decay can be recycled; those that do, enrich the earth.
(Source: DCMP)
What happens when a whale dies? This short piece explores the concept of decay, and the role decay plays in giving life to other organisms.
Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements.
(Source: Library Lyna)
Where do bacteria live, and how long have they been here? How can you tell them apart? What do they do to people and the environment? Answers these and other questions in this overview. Examines the fundamental structure of the bacteria cell, types of bacteria, and their importance to humans and the environment.
Host Trace Dominguez learns about taxidermy and how museums ensure specimens in collections are preserved. He interviews a taxidermist, and she discusses some of the techniques and procedures used to ensure that the specimen will not decay and remain as realistic as possible.
Whether they arise from human causes or forces within planet Earth itself, natural disasters threaten life and civilization with what seems to be growing frequency. Studies troubling developments in marine, arctic, wetland, and urban environments while highlighting research opportunities that may help prevent future catastrophes. Coral reef decay, Everglades habitat loss, polar ice disappearance, and global warming are all analyzed. Looks at earthquake prediction, hurricane and tornado tracking, air pollution monitoring, tsunami warning systems, and the cleanup of toxic flood sediment in New Orleans.
At the Body Farm, the dead speak. Follows the world's first open-air crime lab with founder Bill Bass, of The University of Tennessee, for a close-up look at how cadavers decay. As proxies for murder victims, these decomposing bodies are studied in the name of science and the cause of justice. Talks about the factors and biological markers that help pinpoint time since death, including wind and weather, insects and carnivores, fire damage, soft tissue leachate, mold, and bacteria. Presents three homicide cases that hinged on data and expertise gained at the Farm, and shows Ph.D. students using forensic science and body processing. Shows human bodies in a variety of decomposition stages.
Microorganisms affect everyone. Some are helpful, while others are harmful. Explores pathogenic microorganisms that can cause diseases like sore throats, influenza, tuberculosis, and HIV; decomposer microorganisms that decay rotting plant and animal matter, returning important nutrients back into the soil; and microorganisms that are also being used in the fuel industry to develop new nonpetroleum based products. Overviews food spoilage microorganisms such as mold that can ruin stored food. Explains other bacteria and yeasts are vital to the production of food and drinks like yogurt and bread, along with beer and wine. Examines where they come from and some examples of positive uses relating to many foods we eat.
Biologist Bill Elliot takes a small group of scientist cave exploring. They capture and describe the different creatures that live their lives underground. Elliott and his group are able to shed light on the mysterious life of the underworld. Segment of video from Wild Chronicles Series.
Scientists have identified a crustacean that likes to feast on wood. The squat lobster scavenges for fallen trees and even the occasional shipwreck. This discovery is helping scientists learn more about animals colonizing the deep sea. Part of the "News of the Day" series.
Figure 2.6 (OpenStax, Biology 2e) caption: In 1913, Niels Bohrs developed the Bohr model in which electrons exist within principal shells. An electron normally exists in the lowest energy shell available, which is the one closest to the nucleus. Energy from a photon of light can bump it up to a higher energy shell, but this situation is unstable, and the electron quickly decays back to the ground state. In the process, it releases a photon of light.
(Source: OpenStax)
Termites are responsible for the disappearance of many tons of decaying wood, thanks to the myriad of microscopic beings inhabiting their intestines. These microscopic inhabitants are able to breakdown cellulose, which cannot be digested by most animals. After these symbionts digest the molecules of cellulose, they provide the sugar that termites need for nourishment.
Carbon (from Latin: carbo "coal") is a chemical element with symbol C and atomic number 6. On the periodic table, it is the first (row 2) of six elements in column (group 14), which have in common the composition of their outer electron shell. It is nonmetallic and tetravalent - making four electrons available to form covalent chemical bonds. Three isotopes occur naturally, 12C and 13C being stable while 14C is radioactive, decaying with a half-life of about 5,730 years. Carbon is one of the few elements known since antiquity.
Think of earthworms and a few things come to mind: they make great bait for fishing, they aerate the soil, and they’re an excellent addition to a compost pile. But, what a lot of people don’t know is many earthworms are actually invasive species. Earthworms may be small but when they take over a forest, the impact is dramatic. They cause the rapid incorporation of organic material into the soil, changing its structure, chemistry and nutrient dynamics. What's known as the duff layer is suddenly removed, and this duff, or decaying organic material on the forest floor, is habitat for several species of insects, spiders, small vertebrates, bacteria and fungi. It is also the primary rooting zone for most plants.
Showing collections 1 to 3 of 3
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 Chemistry related resources
A collection containing 67 resources, curated by Benetech
