The Earth’s magnetic field is thought to be caused by:

Which of these layers of the Sun is coolest?

Identify each of the layers of the sun shown above.

What would happen to the Earth if the sun suddenly became a black hole? (ignore the temperature change)

The most abundant element in the sun is

The dark colored bands that are seen on Jupiter (and the other jovian planets) are known as

Label the parts of the comet using the diagram.  

What is the likely final fate of a star whose mass is 25 solar masses after it has finished its nuclear burning phases?

Use the following table to answer the question. Star Apparent Magnitude (m) Absolute Magnitude (M) m-M Spectral Type 1 -1.46 1.46 0 F0 2 -0.72 -2.5 1.78 A1 3 0.12 -8.1 8.22 B8 4 0.41 -7.2 7.61 M2 5 -0.27 4.4 -4.67 G2     Which star has the largest mass?

What happens when a star can no longer fuse hydrogen into helium in the core?