Once Carbon Begins Burning in the Core of a High-Mass

question 10

Multiple Choice

Once carbon begins burning in the core of a high-mass star,the outer layers begin to fall inward,driving up the fusion rates and speeding up the star's evolution primarily because:

• A) the number of particles in the core is decreasing, which now take up less space.
• B) most of the energy is now carried away from the core by escaping neutrinos, which have few if any obstacles to leaving the star.
• C) carbon is a more stable element that appears to settle the star.
• D) the light given off by the fusion of carbon is a different wavelength than that given off by previous reactions, so the radiation pressure is much smaller.

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Definitions:

Red Blood Cells

Cells in the blood responsible for carrying oxygen from the lungs to the rest of the body and returning carbon dioxide to be exhaled.

Rouleaux Pattern

A condition where red blood cells stack up in a row, resembling a stack of coins, often observed in various blood disorders.

B Lymphocytes

White blood cells that form part of the immune system and are involved in the production of antibodies to combat infections.

Humoral Immunity

The aspect of immunity that is mediated by antibodies produced by B cells in response to external pathogens.