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Figure 2.15 (OpenStax, Biology 2e) caption: When we mix table salt (NaCl) in water, it forms spheres of hydration around the ions.
(Source: OpenStax)
Figure 2.23 (OpenStax, Biology 2e) caption: Carbon can form five- and six-membered rings. Single or double bonds may connect the carbons in the ring, and nitrogen may be substituted for carbon.
Matter is made up of tiny particles called molecules. Host, Max Orbit, helps students learn all about the different properties, qualities, and characteristics of matter. He also discusses solids, liquids, and gases. Part of the "Way Cool Science" series.
(Source: DCMP)
Meet a chemist who owns his own business that develops synthetic DNA molecules designed to reprogram cells and help cure diseases. Hear the importance of writing, communication skills, and creativity to becoming a successful chemist. Part of the "Career Connections" series.
How can substances, such as water, exist in several dramatically different phases? Easy-to-understand examples illustrate how phase changes occur. Additional concepts and terminology include states of matter, particles, solid, liquid, gas, plasma, melting, freezing, vaporization, boiling, evaporation, condensation, and sublimation.
Carbon is the basis of all organic molecules. It is also one of the most abundant elements in the universe. This video segment illustrates the special characteristics of carbon that make it an essential ingredient for life.
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 phases of matter. Part of the Science Video Vocab Series.
The engine's job is to convert the energy in fuel to speed. With the application of scientific principles, NASCAR mechanics have discovered ways to quickly and efficiently get the race cars the speed they need to compete. Part of "The Science of Speed" series.
Part of the "Chemistry in Action" series. Numerous real-life examples of elements are exemplified in the table. Animations and graphics illustrate concepts not easily achieved through other instructional strategies. Specific patterns in the periodic table are highlighted. Introduces the following terminology: atomic structure, atomic number, atomic mass, periods, and families.
Part of a series that features a wide variety of video footage, photographs, diagrams, graphics, and labels. For this particular video, students will focus on the biological processes involved in cellular respiration and how these processes provide energy to living things. Part of the Science Video Vocab series.
Vitamins and minerals are essential nutrients because they perform hundreds of roles in the body. There is a fine line between getting enough of these nutrients and getting too much. Eating a healthy diet remains the best way to get sufficient amounts of vitamins and minerals. In addition to vitamins and minerals, water is also essential for the optimal performance and regulation of the human body. Part of the "Human Nutrition" series.
Figure 2.17 (OpenStax, Biology 2e) caption: The adhesive forces exerted by the glass' internal surface exceeding the cohesive forces between the water molecules themselves causes capillary action in a glass tube. (credit: modification of work by Pearson-Scott Foresman, donated to the Wikimedia Foundation)
NASCAR tires are filled with nitrogen to help protect against heat caused by friction. Friction also increases the air pressure in tires, and NASCAR drivers don't want a tire to blowout during a race. The use of nitrogen helps the crew predict how hot the tires will get. Part of "The Science of Speed" series.
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.
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.
With support from the National Science Foundation, chemist Kent Kirshenbaum and his team at New York University are engineering molecules to mimic the shapes, structures, and functions of natural proteins. The ultimate goal of this biomimetic chemistry research is to develop a reliable way to build synthetic proteins that can be put to work at the industrial scale. Part of the "Science Nation" series.
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.
A solution is a homogeneous mixture of two or more substances. It contains a solute and and solvent. Solubility is the maximum quantity of a solute that can be dissolved in a given amount of solvent at a specified temperature. Other topics covered include concentration, Raoult's law, colligative properties, and non-ideal behavior. Part of the "Chemistry" series.
Organics are carbon-based molecules and key ingredients to life. Scientists want to know if organics can be found on Mars. However, finding organics is difficult because they easily break down when exposed to harsh things like extreme radiation and chemical oxidants. These broken down particles give the Martian surface its rusty color. Part of the “Mars in a Minute” series.
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A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
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
