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It is a fireball in the sky, a bubbling, boiling, kinetic sphere of white hot plasma, exploding and erupting. Its size is almost unimaginable--one million Earths would fit within its boundaries. In this violence is born almost all the energy that makes existence on Earth possible. Yet, its full mysteries are only now beginning to be understood. From sunspots to solar eclipses, solar flares to solar storms, the birth of the sun to its potential death, discover the science and history behind this celestial object that makes life on Earth exist.
(Source: DCMP)
In this episode, host Dianna Cowern conducts and explains 5 scary physics experiments. She uses dry ice, a Van de Graaff generator, and a plasma ball to demonstrate a few principles of physics. Part of the "Physics Girl" series.
Anything that takes up space or has mass is matter. Under certain conditions matter can be a solid, liquid, gas or plasma. Different states of matter can be combined in suspensions, and solutions and mixtures can be taken apart. Exploring the physical and chemical properties of matter provides insight into nature and a glimpse at how scientists and engineers use this knowledge to shape our world.
Part of the "Visualizing Cell Processes" series. Includes the following modules: "Behavior of the Plasma Membrane," "Osmosis," "Transport Proteins," "Phagocytosis," "Pinocytosis," "Receptor Mediated Endocytosis," "Golgi Function," "Lysosomes and Digestion," "Microtubules," "Cilia," and "Actin and Myosin Motor Proteins."
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.
What are the differences between solids, liquids, and gases? In this program, students will investigate real-life examples of the various phases of matter. Colorful animations illustrate how these states differ based on the movement of particles. Other topics covered include plasma, crystalline and amorphous solids, viscosity, freezing, vaporization, evaporation, and condensation.
Part of the "Inside the Living Cell" series. Describes the properties of the plasma membrane, how it governs the kinds of molecules that go in and out of cells, and how cells feed by engulfing (phagocytosis) and drinking in (pinocytosis) fluids. Also reviews membrane structure, osmosis, transport proteins, active transport, cell eating, cell drinking, and receptor proteins.
Discusses the importance of monitoring the cardiovascular system and explains the process of respiration in the body. Animations demonstrate how the organs in the heart work to pump blood throughout the body. Other terminology includes: blood vessel, artery, pulse, vein, aorta, septum, atrium, ventricle, capillaries, pulmonary circulation, systemic circulation, coronary circulation, blood pressure, sphygmomanometer, plasma, red blood cells, white blood cells, platelet, lungs, and alveoli.
This transmission electron micrograph of a mitochondrion shows an oval, outer membrane and an inner membrane with many folds called cristae. Inside of the inner membrane is a space called the mitochondrial matrix. Unlike prokaryotes, eukaryotic cells have a nucleus and other membrane-bound organelles that allow the cell to compartmentalize different functions. These videos will provide an overview of eukaryotic cells and will take you through the structures and functions of the various organelles found within the plasma membrane.
(Source: OpenStax)
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