What Are the Two Properties That Define a Star

Q28: The net result of the proton-proton chain

Q29: Sunspots always occur in:<br>A) 13-year cycles.<br>B) weak

Q30: What is required to overcome the electrical

Q31: In which of the following ways are

Q32: A star loses one billion kilograms of

Q34: The Sun produces energy through:<br>A) fission.<br>B) the

Q35: A sunspot has a temperature 80% as

Q36: Sunspots are dark because:<br>A) dust particles congregate

Q37: Which of the following is necessary for

Q38: The figure below shows the layers of