Transcript of Chapter 7 Section 4 Energy in Earth’s Atmosphere.
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- Chapter 7 Section 4 Energy in Earths Atmosphere
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- Anticipatory Set https://www.youtube.com/watch?v=xZ6XUk7QLbU
https://www.youtube.com/watch?v=xZ6XUk7QLbUhttps://www.youtube.com/watch?v=xZ6XUk7QLbU
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- Standards and Objectives S 6.3d: Students know heat energy is
also transferred between objects by radiation. ( radiation can
travel through space). S 6.3d: Students know heat energy is also
transferred between objects by radiation. ( radiation can travel
through space). S 6.4.b: Students know solar energy reaches earth
through radiation, mostly in the form of visible light. S 6.4.b:
Students know solar energy reaches earth through radiation, mostly
in the form of visible light. Students will be able to: Students
will be able to: State in what form energy travels from the Sun to
the Earth State in what form energy travels from the Sun to the
Earth Explain what happens to the suns energy in the atmosphere and
at Earths surface. Explain what happens to the suns energy in the
atmosphere and at Earths surface.
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- Language of the Discipline electromagnetic waves
electromagnetic waves radiation radiation infrared radiation
infrared radiation ultraviolet radiation ultraviolet radiation
scattering scattering greenhouse effect greenhouse effect
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- Energy from the Sun (Input) Nearly all the energy in Earths
atmosphere comes from the sun. Nearly all the energy in Earths
atmosphere comes from the sun. This energy travels to Earth as
electromagnetic waves- a form of energy that can move through the
vacuum of space. This energy travels to Earth as electromagnetic
waves- a form of energy that can move through the vacuum of space.
Electromagnetic waves are classified according to wavelength, or
distance between waves. Electromagnetic waves are classified
according to wavelength, or distance between waves. Radiation- the
direct transfer of energy by electromagnetic waves, so the
electromagnetic waves given off by the sun are called solar
radiation. Radiation- the direct transfer of energy by
electromagnetic waves, so the electromagnetic waves given off by
the sun are called solar radiation.
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- Energy From the Sun ( cont.) Most of the energy from the sun
travels to Earth in the form of visible light. Most of the energy
from the sun travels to Earth in the form of visible light. Visible
light includes all the colors you see in a rainbow. The different
colors are the result of different wavelengths. Visible light
includes all the colors you see in a rainbow. The different colors
are the result of different wavelengths. Red and orange have the
longest wavelengths, while blue and violet light have the shortest
wavelengths. Red and orange have the longest wavelengths, while
blue and violet light have the shortest wavelengths.
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- Energy From the Sun ( cont.) Infrared radiation - a form of
electromagnetic energy that has wavelengths that are longer than
red light. Infrared radiation - a form of electromagnetic energy
that has wavelengths that are longer than red light. Infrared
radiation is not visible, but can be felt as heat. Infrared
radiation is not visible, but can be felt as heat. Ultraviolet
radiation - an invisible form of energy with wavelengths that are
shorter than violet light. Ultraviolet radiation - an invisible
form of energy with wavelengths that are shorter than violet light.
The sun gives off ultraviolet radiation. The sun gives off
ultraviolet radiation. It can cause sunburns, skin cancer and eye
damage. It can cause sunburns, skin cancer and eye damage.
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- Solar radiation includes a full spectrum of wavelengths, from
below the infrared to above the ultraviolet. Solar radiation
includes a full spectrum of wavelengths, from below the infrared to
above the ultraviolet.
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- Energy in the Atmosphere Scattering- a process by which dust
particles and gases in the atmosphere reflect light in all
directions. Scattering- a process by which dust particles and gases
in the atmosphere reflect light in all directions. When you look at
the sky, the light you see has been scattered by gas molecules in
the atmosphere. They scatter short wavelengths of visible light (
blue and violet) more than long wave-lengths (red and orange).
Therefore, scattered light looks looks bluer than ordinary
sunlight. This is why the daytime sky looks blue. When you look at
the sky, the light you see has been scattered by gas molecules in
the atmosphere. They scatter short wavelengths of visible light (
blue and violet) more than long wave-lengths (red and orange).
Therefore, scattered light looks looks bluer than ordinary
sunlight. This is why the daytime sky looks blue.
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- Energy at Earths Surface Greenhouse effect- the process by
which gases hold heat in the air Greenhouse effect- the process by
which gases hold heat in the air It is a natural process that keeps
Earths atmosphere at a temperature that is comfortable for most
living things. It is a natural process that keeps Earths atmosphere
at a temperature that is comfortable for most living things.
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- Checking for Understanding True of False? True of False?
Visible light includes all the colors that you seen in a rainbow?
Answer: TRUE
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- Dust particles and gases in the atmosphere reflect light in all
directions, a process called ____________. Answer: Scattering
Answer: Scattering
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- The process by which gases hold heat in the air is call the
__________ ______________. Answer: Greenhouse effect