Water Movement in Soil

Birthday Stars

http://www.planet-science.com/categories/over-11s/space/2010/12/birthday-stars.aspx

Birthday Star

Use the Birthday Stars computer to find out your birthday star!

What's the best gift that you can get for your birthday? Chocolate, DVDs and clothes are all good gifts, but what if you could get your very own star? That would be brilliant!

Whilst you might not be able to buy your own star (yet), the Birthday Stars computer will look for a star that is your age in light years away from the Earth. This means that the light we're seeing from the star today actually left the star around when you were born and has taken your entire life to reach Earth. Amazing! Try it here:


http://outreach.jach.hawaii.edu/birthstars/

Birthday Stars    What's this all about?

Light travelling in empty space is the fastest thing in the universe. It travels at 186,000 miles per second!
The stars are so far away from us that their light still takes a long time to reach Earth. One light year is the distance light travels in a year: 5,878,499,812,499 miles. The closest star apart from the Sun is 4.2 light years away, so its light takes 4.2 years to reach Earth.
Tell the Birthday Stars computer when you were born, and it will look for a star that is your age in light years away from Earth. This means that the light we're seeing from that star today actually left the star around when you were born, and has taken your entire life to reach Earth.
From month to month you may see your birthday star changing. This is because as you get older the light from more and more distant stars has had the time to travel to Earth in during your life.

The Earth and beyond

http://www.skoool.ie/content/skoool_learning/junior/lessons/science/earth_beyond/flash/h-frame-ns6.htm

Greatest discoveries in Earth Science: Continental Drift, The Core, Sea floor spreading, Plates tectonics

http://www.sciencechannel.com/tv-shows/greatest-discoveries/videos/100-greatest-discoveries-plate-tectonics.htm

Solar eclipses. Astronomy 161. The Solar System.

 http://csep10.phys.utk.edu/astr161/lect/time/eclipses.html

One consequence of the Moon's orbit about the Earth is that the Moon can shadow the Sun's light as viewed from the Earth, or the Moon can pass through the shadow cast by the Earth. The former is called a solar eclipse and the later is called a lunar eclipse. The small tilt of the Moon's orbit with respect to the plane of the ecliptic and the small eccentricity of the lunar orbit make such eclipses much less common than they would be otherwise, but partial or total eclipses are actually rather frequent.