213 resources and 4 collections matched your query.
Library of 3383 accessible STEM media resources.
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Using light as a probe, scientists found innovative ways to make inferences about the inner structure of the atom. In this unit, scientists discuss the change from believing the atom was a single indivisible particle to later understanding the atom is composed of subatomic parts. This new picture of matter lead to the development of the quantum model of the atom, as well as ways to identify traces of chemical elements, whether on earth, in the sun, or in a distant galaxy. Part of the series Chemistry: Challenges And Solutions.
(Source: DCMP)
This album of eight computer-animated video segments looks at the particle approach to studying light by exploring the antithesis of the wave model. Presents black-body radiation, Planck's constant, the photoelectric effect, and the work of James Clerk Maxwell as forerunners to Einstein's concept of photon frequency. Shows examples of a slope-intercept graph and a revised double-slit experiment using light-sensitive paper segue to an illustration of the Compton effect, establishing that light consists of a stream of particles. De Broglie's contributions introduce wave-particle duality, which some might consider an inadequate solution, although it represents the best that current science can do.
Covid-19 image, 3D model with accompanying video exploration of the 3D model.
(Source: North Carolina Central University)
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)
Part of a series that features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. Begins with a simple definition of the term and concludes with a critical thinking question. For this particular video, students will focus on the term model. Part of the Science Video Vocab Series.
In the early 1950s, American biologist James Watson and British physicist Francis Crick came up with their famous model of the DNA double helix. The structure of DNA, as represented in Watson and Crick's model, is a double-stranded helix. The sugar-phosphate backbones of the DNA strands make up the outside of the helix, while the nitrogenous bases are found on the inside and form hydrogen-bonded pairs that hold the DNA strands together. Other topics covered include DNA replication, RNA transcription, and RNA translation. Part of the "Biology" series.
The Lemhi Valley is a sagebrush steppe in Eastern Idaho, along the border with Montana. It is a critical habitat for the pygmy rabbit, and University of Idaho mammalian ecologist Janet Rachlow is gathering data to create maps showing where and when the rabbits spend their time. What they learn about the links between habitat features and habitat use could help inform future decisions involving land management and restoration for these types of environments. Part of the “Science Nation” series.
3D Model Dinosaur T-Rex Skull and Base.
(Source: Thingyverse)
The most common bacterial shapes are rods, cocci (round), spirals and filaments. Groups of these cells can be differently arranged in space. Four 3D-printable models illustrate these shapes and arrangements.
(Source: MicroBVI)
Most bacteria grown by fission, one cell dividing into two. When nutrients are abundant, this can result in exponential growth, with a large increase in the number of cells over a surprisingly short period of time. Bacterial cell division and the characteristics of exponential growth are illustrated with four, 3D printable models
Colony formation on semi-solid medium is basic characteristic of many different bacteria and an important property for microbiologists. These models illustrate the different types of colonies formed, what a colony reflects at the cellular level, how microbiologists obtain isolated colonies, and what happens when cells swarm instead of forming colonies.
Boron is a chemical element with the symbol B and atomic number 5.
(Source: Library Lyna)
Fluorine is a chemical element with the symbol F and atomic number 9.
Europium is a chemical element with the symbol Eu and atomic number 63.
Thulium is a chemical element with the symbol Tm and atomic number 69.
Ytterbium is a chemical element with the symbol Yb and atomic number 70.
Actinium is a chemical element with the symbol Ac and atomic number 89.
Cobalt is a chemical element with the symbol Co and atomic number 27.
Zinc is a chemical element with the symbol Zn and atomic number 30.
Showing collections 1 to 4 of 4
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
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
