Download Lecture Notes: Chapter 24 THE SUN

Lecture Notes: Chapter 24 THE SUN
24.1 The Study of Light
Electromagnetic radiation includes __________ rays, X-rays, ultraviolet light, visible
light, infrared radiation, microwaves, and _______ waves.
Nature of Light In some instances light behaves like waves, and in others, like particles.
A ____________ is a small packet of ______energy.
1.
Identify the visible light portion of the EM spectrum on the diagram.
2. Which light form has the highest energy? ________ Lowest? _________
3. Which visible light has higher energy (shorter wavelength)? Blue or Red? ______
Why is the sky blue? ________________________________________________
Spectroscopy - _____________ the properties of ________ (that depend on wavelength).
An absorption spectrum (is a ____________ spectrum produced) when white light passes
through a _________________ under low pressure
An emission spectrum - _______________________ (of particular wavelengths)
produced by a _______________ under low pressure.
When the spectrum of a star is studied, the __________________ act as “fingerprints.”
• These lines _____________________ present and thus the star’s chemical composition.
The Doppler effect is the apparent _________________________ of electromagnetic
or sound waves caused by the relative motions of the source and the observer.
In astronomy, the Doppler effect is used to _____________ whether a star or other body
in space is ___________________________________________ Earth.
Which of the following is not an electromagnetic wave? ______________________
Sequence the components of visible light according to wavelength, beginning with the
shortest wavelength. __________________________________________________
24.2 Tools for Studying Space
A refracting telescope is a telescope that uses a lens ______________________ light.
A reflecting telescope is a telescope that reflects light off a ____________________,
focusing the image in front of the mirror.
Draw each telescope 
How do radio telescope gather data? ______________________________________
24.3 The Sun
Composed of mostly Hydrogen (90%) and Helium (10%) and small amounts of many
other elements
Temperatures _____________________________ (10 million deg C) because
____________________________ (as you compress a gas) _____________________
Composed of interior (______________________________________________ zone)
and atmosphere (_________________________________________________)
Draw/label all the layers/parts of the Sun 
Layer of Sun
Interior or
Atmosphere?
Thickness?
Size?
Temperature?
Notable
Features
Other
Photosphere
Chromosphere
Corona
Sunspots
Prominences
Solar Flares
Nuclear ________________ is the way that the Sun produces energy.
This reaction converts ______________________ nuclei ___________ the nucleus of a
_________atom, releasing a tremendous amount of energy.
Which layer of the Sun can be thought of as its surface? ___________________
Are the same number of Sunspots always present on the Sun? Explain
Why do Sunspots appear dark? ______________________________________
2. What is the corona?
3. What is convection?
4. What is a convection current?