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PRIMARIA - 5º - LIGHT AND ELECTRICITY - CIENCIAS DE LA NATURALEZA - FORMACIÓN

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Subido el 27 de mayo de 2020 por Cp santodomingo algete

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light and electricity what is light light is a form of energy that illuminates things 00:00:01
it is visible by particles called photons where is light light is everywhere life could not exist 00:00:17
without light light is visible to the human eye it is believed to travel faster than anything in 00:00:25
the universe it travels through liquids and gases too there are two main types 00:00:33
of light natural light and artificial light natural light can be found in 00:00:39
nature it is not electronic artificial light is human-made electricity how can 00:00:45
we change light light travels in a straight line but there are three ways 00:00:52
to change light. The first is through reflection. Reflection occurs when light 00:00:58
waves bounce off a surface. You can also change light through refraction. 00:01:05
Refraction is the bending or turning of light changing its path. The third way to 00:01:13
change light is by blocking it. Blocked light is when light is blocked by a 00:01:22
a non-transparent object. But what is electricity? Electricity is a transfer of electrons from one 00:01:27
atom to another. Electrons move and create an electric current which allows light to shine. 00:01:39
The current flows through electrical wires and powers electronic items. 00:01:47
Here are two types of electricity. Static electricity is generated by rubbing two or 00:01:52
more objects together to build friction. There is also current or dynamic electricity. This 00:02:01
is generated by the flow of an electrical charge through a conductor across the electrical field. 00:02:09
Electronics need an electrical current to operate. Electric current travels through wires, 00:02:15
which can either be a direct or alternating current direct current is 00:02:24
the power that comes from batteries fuel cells or solar cells there are positive 00:02:31
and negative terminals the electrons travel in one direction next there is 00:02:38
alternating current this is the power that comes from power plants which 00:02:47
to travel through power lines. 00:02:52
This current reverses or alternates 00:02:55
between the plant and the destination of the power. 00:02:58
The electrons travel in a loop. 00:03:02
There are many ways to provide energy. 00:03:06
The first is through magnetism. 00:03:09
Magnetism is electricity that can be produced by magnets. 00:03:11
This is because a magnetic field can move electrons. 00:03:15
Power plants use giant magnets to create electricity 00:03:21
by using generators. 00:03:26
Power plants provide the energy for the alternating current 00:03:29
flowing in both directions through the power lines. 00:03:32
When you turn on a light in your home 00:03:38
or plug something into an electrical outlet, 00:03:40
the power flows from the power plant. 00:03:44
However, before it enters the home, 00:03:49
will pass through the transformer on the utility pole. Then it travels from the 00:03:52
circuit breaker or fuse box to the outlets and wall switches you use in 00:03:58
your home. There are different fuels used by power plants to produce electricity 00:04:04
across the world. Thermal power plants have two different categories. Nuclear 00:04:10
power plants that create electricity by burning fuel and electric power plants 00:04:19
that create electricity via prime mover. There's also solar power plants. Solar 00:04:25
power plants make use of the available solar energy from the Sun. Lightning, 00:04:32
conductors, and insulators. Lightning is electricity. It is an electric current 00:04:39
found in nature. Lightning occurs when small bits of ice collide inside of a 00:04:48
cloud. That creates an electric current and when it interacts with the ground, 00:04:55
lightning strikes. Conductor. A conductor is any material or substance that allows 00:05:00
electricity to flow through them. Examples are metals like steel, copper, 00:05:10
iron, gold, and silver. Seawater can also be a conductor. Insulators. Insulators prevent or 00:05:16
block the flow of electricity. Examples include plastic, rubber, glass, and porcelain. Thomas 00:05:27
Alva Edison, 1847 to 1931. A poor and shy boy, nearly deaf due to sickness, Edison learned to 00:05:38
conduct experiments with his mother. By the age of 15, Edison got his first job as a telegraph 00:05:47
operator. His first major invention was a volt counter. Thomas Edison's first big project 00:05:54
was an improved stock ticker. It sold for $40,000. In 1878, Edison came up with a major 00:06:03
improvement on the light bulb he helped create the first electric power station to generate 00:06:14
electricity in two homes thomas edison was a man of many inventions here are a few of his 00:06:20
inventions and advancements the phonograph completed in 1877 it was made to record and 00:06:28
play sound using a metal needle. Next is the kinetograph made in 1861. The kinetograph is 00:06:38
the first motion picture camera. Next is the incandescent light bulb 1879. Edison did not 00:06:48
invent the first light bulb but he did complete the first commercially viable one. 00:06:57
Thomas Edison made major improvements on x-ray technology, batteries, and telephones as well. 00:07:04
Thank you for listening. Goodbye. 00:07:13
Subido por:
Cp santodomingo algete
Licencia:
Reconocimiento - Compartir igual
Visualizaciones:
91
Fecha:
27 de mayo de 2020 - 12:54
Visibilidad:
Público
Centro:
CP INF-PRI SANTO DOMINGO
Duración:
07′ 25″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
163.42 MBytes

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