Question

base your answers to the following questions on the diagram below and on your knowledge of earth science. the diagram represents the inferred origin and evolution of most stars. which process produces large amounts of energy in a star by combining lighter elements into a heavier element? convection radiation radioactive decay nuclear fusion the mass of a star most determines how its lifetime will develop. true false

Explanation:

• Question 7: Nuclear fusion is the process where lighter elements combine to form a heavier element, releasing a large amount of energy. Convection is a heat - transfer process (fluid movement due to density differences). Radiation is the emission of energy as electromagnetic waves. Radioactive decay is the breakdown of an unstable nucleus.
• Question 8: The mass of a star is a crucial factor in its lifetime. More massive stars have shorter lifetimes because they burn through their fuel (hydrogen for fusion) at a much faster rate. For example, a massive star may burn through its hydrogen in a few million years, while a low - mass star (like the Sun) can burn hydrogen for billions of years.

Answer:

1. nuclear fusion
2. True