¿por qué el sol esta caliente?

Dispuesto en capas, el Sol varía su temperatura, es más caliente en el centro y más frío en las capas externas, hasta que extrañamente se vuelve a calentar al acercarse a su atmósfera. En el núcleo solar, la gravedad produce una presión intensa y temperaturas de hasta 15 millones de grados Celsius.

Explanation:

Lo siento, no hablo español tan bien. El sol está caliente porque las fusiones nucleares se llevan a cabo dentro de él, emitiendo una inmensa cantidad de diferentes tipos de energía, incluida la energía térmica. ¡Espero haber respondido a tu pregunta!

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."