- The outermost layer of the Sun is called the ____________
- During periods of high solar activity, huge cloudlike structures that appear as great arches extending from the Sun are often produced. These solar features are called_________.
|the solar wind|
- True or False: For an optical telescope, the size of the primary mirror does not matter. The same number of photons will be collected whether the telescope has a small or large primary mirror.
- The main two methods of heat/energy transfer within the Sun are _________ and __________.
|convection and radiation|
|conduction and radiation|
|convection and conduction|
|convection and ionizing|
- The CCD (charged-coupled device) is a(n):
|array of electrodes used on spacecraft to detect charged particles such as electrons and protons|
|detector in which a small electric current is controlled by a bimetallic strip that expands and contracts in response to infrared radiation|
|array of small light-sensitive cells that can be used in place of photographic film to obtain a picture|
|electronic filter to single out one wavelength or set of wavelengths for studying astronomical objects|
- Which of the following statements is TRUE?
|Visible light is not part of the electromagnetic spectrum|
|Visible light takes up only a very small part of the total range of wavelengths in the electromagnetic spectrum|
|Visible light takes up most (but not all) of the total range of wavelengths in the electromagnetic spectrum|
|Visible light takes up all of the electromagnetic spectrum|
- How come we can see a ‘surface’ of the sun if it is really just a ball of gas? Why don’t we see right through the Sun?
|The gas particles are too big, they have large diameters|
|The gas particles are heavy|
|The gas particles are packed very dense in the Sun|
|The gas particles put on their cloaking devices.|
- Where on the Sun do sunspots occur?
- Light can be described as a stream of fast-moving “bundles of energy” called ___________, which travel as waves.
- You can get a sunburn from being out in the Sun too long. Sunburns are caused by which type of heat/energy transfer from the Sun to your Skin?
- True or False: All light waves travel at the same speed
- Sunspots appear dark because they are cooler than the surrounding solar surface.
- The layer of the Sun that radiates most of the light that reaches Earth is called the___________.
- The main optical element in a refracting telescope is a ______.
|combination of many small plane mirrors|
|prism of glass|
- Which of the following colors has the longest wavelength?
- To determine whether a celestial body is approaching or receding from Earth, astronomers employ ____________.
|the Doppler principle|
|Kepler’s first law|
|the Stefan-Boltzmann law|
- This Sun is composed almost entirely of two gases. They are Blank 1 and Blank 2.
- The light-gathering power of a telescope is related directly to the _______.
|focal length of the mirror or lens|
|area of the mirror or lens|
|image quality of its optics|
|length of the telescope tube|
- Which of the following is NOT considered a form of electromagentic radiation?
- The Sun’s surface has a grainy texture produced by numerous bright markings called__________.
- The Sun’s source of energy at the present time is thought to be
|thermonuclear fission (splitting) of heavy elements into hydrogen.|
|chemical burning of hydrogen gas with oxygen.|
|thermonuclear fusion (combining) of hydrogen atoms.|
- In the case of light, when a source is moving away, its light appears redder than it actually is.
- What name is given to the visible “surface” of the Sun?
- Which of the following is FALSE regarding our Sun
|The Sun is normal, main sequence star|
|The Sun is the closest Star to Earth|
|The Sun used fusion to fuel itself|
|The Sun is smaller in diameter than Jupiter, the largest planet in our Solar System|
- The Hubble Space Telescope (HST) is an optical telescope