The sun and earth’s seasons
20
THE SUN AND EARTH’S SEASONS Module 16 Earth and Environmental Science
-
Upload
kella-randolph -
Category
Education
-
view
204 -
download
0
description
sun, seasons, solstice, equinox, Northern lights, photosynthesis, nuclear fusion
Transcript of The sun and earth’s seasons
THE SUN AND EARTH’S SEASONS
Module 16 Earth and Environmental Science
How hot is the sun?The average temperature of the sun is 5600 degrees K (Kelvin)
1348x1348-nasa.gov
What type of star is our sun?Our sun is a yellow star.
www.publicdomainpictures.net
Gases of the sunOur sun is made up largely of helium and hydrogen.
320x261-cse.ssl.berkley.edu
How does the sun get its energy?Nuclear fusion of helium and hydrogen gives off huge amounts of energy and light.
www.e-education.psu.edu
516x387-snews.bnl.gov
What are the layers of the sun?From the center out:
Core
Photosphere
Chromosphere
Corona
http://en.wikipedia.org/wiki/File:Sun_poster.svg
The layers of the sun are: From the center out:
Core
Photosphere
Chromosphere
Corona
946x710-nasa.gov
The surface layerOf the sun is the photosphere.
NASA
Corona means crown.We can only see the corona of the sun during an eclipse.
516x412-sunearthday.gsfc.nasa.gov
Solar prominenceSolar prominences are arches of glowing gas that extend outward from the sun’s photosphere.
1348x1348-nasa.gov
A sunspot cycle lastsabout 11 years.
1024x768-nasa.gov
The sun’s activities can cause damage on Earth.
Solar activities can:
a. cause auroras
b. disrupt radio communication
c. damage satellites
www.Wikipedia.com
NASA.gov
Seasons on earthAre caused by the sun and the tilt of the earth’s axis
Earth’s path around the sun is
Elliptical.
860x389-spacescience.arc.nasa.gov
The Vernal equinoxThe vernal equinox marks the start of spring.
732x520-solarsystem.nasa.gov
Four seasons: spring, summer, fall, winter
Photosynthesis Plants make their energy through a process called photosynthesis.
www.e-education.psu.edu
614x441-oceancolor.gsfc.nasa.gov
1000x667-nasa.gov
equation
• 6CO2 + 12H2O + light → C6H12O6 + 6O2 + 6H2O
The equation for photosynthesis
614x441-oceancolor.gsfc.nasa.gov
EnergyAll organisms need energy to survive. Some, like green plants, can make their own food through photosynthesis. Animals, however, must eat to get food for energy. Animals may eat plants, other animals, or both.
Publicdomainpictures.net
www.freeimages.co.uk
The sunHuge, very hot, needed for life to exist on Earth.
422x327-hpde.gsfc.nasa.gov
