Students make edible models of algal cells as a way to tangibly …
Students make edible models of algal cells as a way to tangibly understand the parts of algae that are used to make biofuels. The molecular gastronomy techniques used in this activity blend chemistry, biology and food for a memorable student experience. The models use sodium alginate, which forms a gel matrix when in contact with calcium or moderate acid, to represent the complex-carbohydrate-composed cell walls of algae. Cell walls protect the algal cell contents and can be used to make biofuels, although they are more difficult to use than the starch and oils that accumulate in algal cells. The liquid juice interior of the algal models represents the starch and oils of algae, which are easily converted into biofuels.
This video, adapted from NASA, presents rare experimental evidence from the Fermi …
This video, adapted from NASA, presents rare experimental evidence from the Fermi Gamma-ray Space Telescope supporting Einstein's prediction that space-time is smooth.
One of the driving mchanisms in certain chemical reactions is the exchange …
One of the driving mchanisms in certain chemical reactions is the exchange of electrons. In these reactions, one substance gains electrons while another substances loses them. This pathway provides resources relating to electrochemistry, reduction & oxidation, and different types of electrochemical cells.
So we know that all matter is made up of atoms, but …
So we know that all matter is made up of atoms, but what is an atom made out of? Chemists describe the structure of atoms using models. This section will cover the Bohr model, photoelectric effect, absorption and emission spectra, quantum numbers, and electron configurations.
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The interactions of electrons with matter have great explanatory power and are …
The interactions of electrons with matter have great explanatory power and are central to many technologies from transistors, diodes, smoke detectors, and dosemeters to sophisticated imaging, lasers, and quantum computing. A conceptual grasp of the interactions of electrons in general allows students to acquire deeper understanding that can be applied to a very broad range of technologies.
In this animation produced by WGBH and Digizyme, Inc., see how molecules …
In this animation produced by WGBH and Digizyme, Inc., see how molecules of DNA are separated using gel electrophoresis, and how this process enables scientists to compare the molecular variations of two or more DNA samples.
Use a series of interactive models and games to explore electrostatics. Learn …
Use a series of interactive models and games to explore electrostatics. Learn about the effects positive and negative charges have on one another, and investigate these effects further through games. Learn about Coulomb's law and the concept that both the distance between the charges and the difference in the charges affect the strength of the force. Explore polarization at an atomic level, and learn how a material that does not hold any net charge can be attracted to a charged object. Students will be able to:
Students gain a better understanding of the different types of materials as …
Students gain a better understanding of the different types of materials as pure substances and mixtures and learn to distinguish between homogeneous and heterogeneous mixtures by discussing an assortment of example materials they use and encounter in their daily lives.
Celebrate National Periodic Table Day (February 7) with us! This week on …
Celebrate National Periodic Table Day (February 7) with us! This week on Live Science, we will be talking about the process of discovering, or creating, new elements. So far, Berkeley Lab has helped discover 16 elements on the periodic table! Are we close to finding another
Create a giant foaming reaction and wow your friends with the classic …
Create a giant foaming reaction and wow your friends with the classic science demonstration! With just a few simple ingredients, you can make something that looks like toothpaste being squeezed from a tube -- but so big, it must be for elephants!
This inquiry-based lab will allow students to investigate endothermic and exothermic processes …
This inquiry-based lab will allow students to investigate endothermic and exothermic processes with everyday materials and predict the outcome of experiment based on their findings.
The students participate in many demonstrations during the first day of this …
The students participate in many demonstrations during the first day of this lesson to learn basic concepts related to the forms and states of energy. This knowledge is then applied the second day as they assess various everyday objects to determine what forms of energy are transformed to accomplish the object's intended task. The students use block diagrams to illustrate the form and state of energy flowing into and out of the process.
In this lesson designed to enhance literacy skills, students examine energy forms …
In this lesson designed to enhance literacy skills, students examine energy forms in moving objects and discover how changes from one form to another move cars through a roller coaster ride.
On NOVA, a team of carpenters, timber framers, engineers, and historians recreate …
On NOVA, a team of carpenters, timber framers, engineers, and historians recreate a medieval throwing machine called a trebuchet. This adapted video segment explores how understanding energy transfer informs their design.
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