Transcript Sun - Science A 2 Z

Sun
What do we know about the sun?
http://www.nasa.gov/multimedia/imagegallery/image_feature_21.html
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The Sun is a STAR!
It would take over 1,000,000 (1 million) Earth’s to fit inside of the Sun.
The Sun is over 5 billion years old.
The Sun is very hot, about 27 million degrees Fahrenheit at its core!
The Sun is the center of our solar system. The Earth and the other
planets travel around the Sun.
 The Earth is made up of mostly helium and hydrogen.
 The Sun is 93 million miles from Earth! It is the closest star to Earth!
http://www.flickr.com/photos/hobbesken/235438038/
Why is sunlight important?
 If you place your hand on a window
where the sun is shining in, you will
feel the Sun’s heat. The Sun’s heat
keeps the ground and air warm.
 Plants need sunlight to make food
that keeps them growing. When
plants make food they give off
oxygen, a gas that people and
animals breathe. We also eat
plants to live.
 The sun helps you when you are
lost! If you face the Sun in the
morning, your direction is east. In
the after noon, you face the Sun to
the west. How can this help you if
you are lost?
 The Sun can also help you to tell
what time of day it is.
http://fc03.deviantart.net/fs30/f/2008/119/6/c/summer_sun_by_neuthreeno.jpg
Solar Flares
 Huge events take
place on the Sun’s
surface, this is called
solar activity.
 Solar flares are one
kind of activity in
which streams of
superheated gas leap
thousands of miles off
the Sun’s surface into
space!
http://www.lpl.arizona.edu/undergrad/classes/spring2009/Hubbard_206-2/Lectures1/Jan27.htm
Sundials!
 You will each get your own paper plate, one
straw, a pair of scissors, one ruler and some
tape.
 Using a ruler, make a mark at the center of the
plate.
 Mark on your plate, where you want north, east,
south and west to be.
 Using the scissors, make four cuts in your straw
(wait for me to demonstrate how to do it).
 Tape the straw perpendicular to the plate.
 Using your ruler, measure the straw from the
base, and cut it to two inches in height.
http://farm3.static.flickr.com/2661/3744021999_cb362dfa47_o.jpg