Vocabulary
What is the outer layer of the sun’s atmosphere
Corona
What does geocentric mean?
Centered on or around Earth
What does a radio telescope do?
Receives invisible radiation from space
What is the source of the Sun's energy?
Nuclear fusion reactions which convert hydrogen into helium
What Force is especially strong at a sunspot?
Magnetism
What is a fiery burst of gas from the sun that rises thousands of kilometers into space
Prominence
True or False: A solar calendar is easier to calculate than a lunar calendar, If False then Why
False. A lunar calendar is easier to calculate than a solar calendar.
An opening through which light passes
Aperture
The outer layer of the sun’s atmosphere
Corona
Before Earth’s circumference was measured, Aristotle theorized
The earth was a sphere
What is a form of wave energy that has both electrical and magnetic properties
Electromagnetic radiation
What major contribution did Arabs make to the study of astronomy?
Improved astrolabe, Number system including the digit 0, Algebra
Which of the following is not a problem common to refracting telescopes?
The second mirror blocks some light from entering the telescope.
Define a Sunspot
A region of lower temperature on the surface of the sun
A vast, moving interstellar cloud of gas and dust
Nebula
What is the zone on the sun where convection currents bring energy to the sun’s surface and take gas back into the sun
Convective zone
Why was the astrolabe important?
It enabled precise charting of heavenly bodies.
Which telescope will yield a better image. One with mirrors or with lenses?
The one with mirrors
Name two of the three Dwarf Planets
Pluto, Eris, Ceres
A spherical object that orbits the sun and has removed other objects from its orbit
Planet
What is a telescope that uses a series of lenses to magnify objects
Refracting telescope
How were the Julian and Gregorian calendars adjusted for the partial day included in each solar year?
One calendar day was added approximately every fourth year.
Identify one thing that nonoptical telescopes reveal but that optical telescopes cannot show.
Possible answers: electromagnetic radiation that is not visible light, temperature, chemical composition, black holes, objects that are too far away to see their visible light
In what two ways can the sun be used to mark time?
A sundial marks time during a day, and a solar calendar marks time during a year
True or False: Invisible charged particles travel in gusts from the sun all the way to Earth, where they can create auroras and disrupt communication signals. If False then why?
True