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Physical science is a term that encompasses several branches of science, including astronomy, chemistry, earth science and physics. Learn about physical science with information from a science teacher in this free video series on the science of electricity and energy.
There are 26 videos in this series:
Inertia refers to resistance to change or movement, so that the bigger the inertia, the bigger the force needed to be applied to the object. Lear more about inertia as a resistance to changes of movement with information from a science teacher in this free video on mechanics and science lessons.
The working part of a light bulb is called the filament, which is a thin piece of metal that gets very hot. Discover how argon gas in a light bulb keeps the light bulb from burning with information from a science teacher in this free video on electricity and science lessons.
An electric water heater is basically a piece of wire that has a high resistance and that must be kept from coming in direct contact with water. Find out how silica makes an electric water heater safe with information from a science teacher in this free video on electricity and science lessons.
Electricity is used to light up a bulb by heating up the tungsten filament to the point that it glows white. Find out why light bulbs burn out with information from a science teacher in this free video on electricity and science lessons.
A solenoid works by having electricity flow through its copper wire that is provided by a power supply and a switch. Discover how a solenoid becomes a magnet when electricity is supplied to it with information from a science teacher in this free video on electricity and science lessons.
An electric motor works through two main elements, with the first being opposing magnets and the second being a wire coil. Learn about carbon brushes and commutators and how they help electric motors work with information from a science teacher in this free video on electricity and science lessons.
Wind power is created by windmills, which use generators to produce electricity that is gathered by wires. Find out why some windmills produce more energy than others with information from a science teacher in this free video on wind energy and science lessons.
An electric circuit works by using conductors to carry a current from one place to another after a power supply gives energy to the current. Discover the difference between conductors and insulators, as well as what the best conductors are, with information from a science teacher in this free video on electricity and science lessons.
Heat can be used to produce electricity by creating steam when combined with different fuels. Find out how different power stations can use heat to produce electricity with information from a science teacher in this free video on electricity and science lessons.
When heat comes to Earth from the sun, various forms of radiation are absorbed in the atmosphere and converted into infrared radiation. Discover why ultraviolet rays can be more dangerous than infrared rays with information from a science teacher in this free video on radiation and science lessons.
Geothermal energy works by bringing the heat created within the Earth to the surface. Discover how geothermal energy is a renewable form of energy with information from a science teacher in this free video on geothermal energy and science lessons.
In order to understand how light travels, it's important to think of it as a wave or a particle. Learn about the properties of light, such as reflection and refraction, with information from a science teacher in this free video on properties of light and science lessons.
Nuclear energy is produced from either uranium or plutonium through a process called fission. Find out how nuclear reactors are used to slow down neutrons with information from a science teacher in this free video on nuclear energy and science lessons.
Solar energy can produce a current when radiation from the sun hits the surface of silicon chips. Discover how the production of silicon chips can result in solar energy with information from a science teacher in this free video on solar energy and science lessons.
The energy in waves comes from the movement of waves going past a point and creating rotational movement. Discover how rotational movement caused by waves can generate electricity with information from a science teacher in this free video on wave energy and science lessons.
When energy in an atom is lost, it goes to a photon, which is a form of electromagnetic radiation. Find out how photons can give out a visible light with information from a science teacher in this free video on photons and science lessons.
The sun is a star, which is a ball of burning gas that stays as it is through thermonuclear reactions. Learn about fusion reactions that occur in the sun with information from a science teacher in this free video on the sun and science lessons.
Solar energy is rarely used on its own, but rather it is often used in conjunction with wind power or batteries to produce energy. Find out how solar energy is used in calculators with information from a science teacher in this free video on solar energy and science lessons.
Nuclear energy is most often used to form a power station because of how expensive it is to produce. Find out how nuclear power stations are used to produce electricity with information from a science teacher in this free video on nuclear energy and science lessons.
Nuclear energy creates a waste that is extremely toxic and that must be kept in remote areas. Find out how nuclear energy can affect the environment when used in places that are not remote with information from a science teacher in this free video on nuclear energy and science lessons.
A nuclear reactor creates energy by producing heat that, in turn, heats water and produces steam to drive turbines and rotate electrical generators. Find out how nuclear energy is used to bring electricity to homes with information from a science teacher in this free video on nuclear energy and science lessons.
Nuclear energy can be harmful when radioactivity is absorbed by cells of the body. Discover how radioactivity can damage bone marrow and red blood cells with information from a science teacher in this free video on nuclear energy and science lessons.
In order to distill water, the water needs to be turned into steam, which takes 10 times as much energy as it does to boil water. Learn about how long it can take to distill one liter of water with information from a science teacher in this free video on water distillation and science lessons.
Optical fibers are solid glass that produce continuous reflections down the light fiber that come out the other end. Find out how a bundle of optical fibers can be used to transmit pictures with information from a science teacher in this free video on optics and science lessons.
Light is a form of electromagnetic radiation, which always travels at a speed of 186,000 miles per second in a vacuum. Discover how light travels slower in transparent media with information from a science teacher in this free video on electromagnetic radiation and science lessons.
Physical science is an encompassing term for the branches of natural science and science that study non-living systems, in contrast to the biological sciences. The foundations of the physical sciences rests upon key concepts and theories, each of which explains and/or models a particular aspect of the behavior of nature. Physical science can be divided into astronomy, chemistry, earth science and physics. In this free video series, a science teacher provides lessons on the science of electricity and energy sources. Find out how inertia, solenoids and light bulbs work. Learn about wind power, geothermal energy and how nuclear energy is produced. Improve personal knowledge of physical and earth sciences with this information.
Steve Jones Steve Jones is an experienced mathematics and science teacher. He also has many years experience in the field of public speaking and debate, and he is an organizer of debate competitions for high school students. He is the chairman of the Hungarian branch of the English-Speaking Union, which is an international educational charity founded in 1918 to promote international understanding and friendship through the use of the English language.dkdk
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