A Collapsing Cloud Fragment That Will Form a Star of One

question 92

Multiple Choice

A collapsing cloud fragment that will form a star of one solar mass (like our Sun) has a mass of about:

• A) 2 solar masses.
• B) 10 solar masses.
• C) 200 solar masses.
• D) 10²⁰ solar masses.
• E) 10⁴⁰ solar masses.

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Definitions:

Circumflex Artery

A coronary artery that encircles the heart muscle, supplying blood and oxygen to the left atrium and the side and back of the left ventricle.

Bicuspid Valve

Another term for the mitral valve, located between the left atrium and left ventricle of the heart; it has two flaps (cusps).

Aortic Semilunar Valve

A valve in the heart between the left ventricle and the aorta that prevents blood from flowing back into the ventricle.

Pulmonary Trunk

A major blood vessel that exits the right ventricle of the heart, dividing into the left and right pulmonary arteries to carry deoxygenated blood to the lungs.