Prof. Abraham Lincoln
Your name. (Lastname, Firstname I.)
To end of test.
Read this lesson on the Sun and then answer the following questions.
The Sun is composed mostly of hydrogen. At the center
of the Sun the hydrogen fuses in a thermonuclear reaction
to helium at a temprature of 14 million degrees
centigrade. It consumes about 4 million tons of hydrogen
per second. This reaction is resposible for all the energy
on Earth (except nuclear and geothermal) even though the
Sun is 93 million miles away.
To the naked eye the Sun appears to be a featureless
ball of blinding light however there are dark areas on the
surface of the Sun called sunspots. Sunspots only appear
to be dark because they are slightly less bright than the
surrounding surface and slightly cooler than the average
6000 degree centigrade surface temprature. Sunspots are
caused by huge magnetic storms on the Sun's surface and
therefore can appear and disappear.
Make the argument that the Sun (or other stars) actually is responsible for nuclear and geothermal energy on Earth.
After reviewing your answers press the Transmit button to complete this test.