1.1 Examination
Note: questions in this section are presented one at a time.
1.
The _____ is the dense layer of the Sun below which we cannot observe.
2.
Most of the Sun's mass is concentrated in the _____ of the radius.
3.
The Sun's density _____ as you move from the center to the surface.
4.
Which of the following processes can provide enough energy over long time scales to account for the brightness of the Sun?
5.
Which of the following is NOT a step in the proton-proton chain?
6.
Why does the proton-proton chain release such large amounts of energy?
7.
Gamma rays released during the proton-proton chain take nearly _____ to make their way out of the Sun.
8.
The churning process where hot material rises and cooler material sinks is called
9.
Scientists have been able to determine the depth of the convective zone by
10.
The interior of the Sun appears to move like a rigid sphere, rotating once every
11.
The problem with solar neutrinos is that
12.
Granules in the photosphere are about _____ in diameter and are caused by _____.
13.
Sunspots appear darker than the surrounding photosphere because they
14.
A typical sunspot's lifetime can range between
15.
The sunspot cycle's exact cause is still uncertain, but scientists believe it is related to the
16.
The variable rotation rate found in the convection zone was determined by
17.
The photograph shows the Sun in what kind of light?
18.
"Chromosphere" means sphere of
19.
The Sun's corona is visible on Earth only during a total solar eclipse. Why is this so?
20.
Coronal mass ejections, or CMEs, are responsible for all EXCEPT which of the following?
