Know about the Sun’s Energy

Know about the Sun’s Core, Atmosphere, and Sunspots

Comprehend the Solar System’s Structure

The Sun and It’s Domain

Lesson OverviewThe Sun’s Energy The Sun’s Core, Atmosphere, and SunspotsThe Solar System’s Structure

The Sun’s Energy Hermann von Helmholtz

and Lord Kelvin proposed that the source of the Sun’s energy was a very slow gravitational contraction

Scientists began considering that mass can be converted to energy, and energy into mass

The Nuclear Fusion Power of the Sun An atom’s nucleus is made up of protons, positively charged

particles; and neutrons, particles with no electrical charge In nuclear fusion, two nuclei combine to form a larger

nucleus. They “fuse.” Primary source of the Sun’s energy is a series of nuclear

fusion reactions

The Sun’s Core, Atmosphere, and SunspotsThe equilibrium conditions in the Sun are known as

hydrostatic equilibrium Great pressures at the center of the Sun pushes protons

close enough together that hydrogen fusion can take place

Fusion reactions in the core provide a heat source

The Three Modes of Solar Energy Transfer

1. Conduction is the transfer of energy in a solid by collisions between atoms and/or molecules

The Three Modes of Solar Energy Transfer,2. Convection occurs

when the atoms of a warm liquid or gas move from one place to another

3. Radiation is the transfer of energy by electromagnetic waves

The Three Layers of the Sun’s Atmosphere 1. Photosphere is the visible part of the Sun and that

part of the solar atmosphere that emits light 2. Chromosphere is the region between the

photosphere and the corona3. Corona is the outermost portion of the Sun’s

atmosphere

The Solar Wind Solar wind is a continuous

outflow of charged particles from the Sun

Moving at about 249 miles per second near Earth, it plays a significant role in space weather activity

The Impact of Sunspots and Solar Flares on Earth’s ClimateSunspots are dark spots appearing on the Sun’s surface caused by the Sun's

magnetic field welling up to the photosphere, the Sun's visible "surface". A solar flare is an explosion near or at

the Sun’s surface, seen as an increase in activity such as prominences (bulges)

http://www.youtube.com/watch?v=nmDZhQAIeXM

The Solar System’s StructureThe Sun more than 99 percent of the Solar

System’s mass 10 times larger in diameter than Jupiter Sun’s diameter is about 862,000 miles

How the Solar System Formed Evolutionary theory - how the solar system came

to be as part of a natural sequence of eventsCatastrophe theory refers to an unusual event Modern evolutionary theories - the formation of

the Solar System resulted from gravitational forces and pressures on heat and mass

Classifying Objects in the Solar SystemFour innermost planets – Mercury, Venus, Earth

and Mars – are called the terrestrial planets Next four planets – Jupiter, Saturn, Uranus and

Neptune – are called the Jovian planets Pluto is now considered a dwarf planet

Classifying Objects in the Solar System, A planet is a celestial body

that: Orbits the SunHas sufficient mass for

its self-gravity to overcome rigid body forces so that it assumes a nearly round shape

Has cleared the neighborhood around its orbit

Sun BINGO ChallengeB I N G O

Catastrophe Theory Solar Wind Jovian Planets Terrestrial Planets Solar Wind

Solar Flares Chromosphere Modern Evolutionary Theories

Convection Sunspots

Conduction Corona FREESPACE

Helium Solar Flares

Dwarf Planet Equilibrium Hydrogen Hydrostatic Equilibrium

Neutrons

Evolutionary Theories

Radiation Protons Nuclear fusion Photosphere

Know about the Sun’s Energy

Know about the Sun’s Core, Atmosphere, and Sunspots

Comprehend the Solar System’s Structure

The Sun and It’s Domain