Comets are cosmic snowballs of frozen gases, rock and dirt that orbit the Sun. once frozen, they're the dimensions of a small city. when a comet's orbit brings it about to the Sun, it heats up and spews dirt and gases into an enormous glowing head larger than most planets.
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Answer:
2 half lives
Explanation: 100% then 50% = 1 half life, 50% then 25%=2nd
The greenwhich meridian line running through the center of the world
The area that gets the lesser amount of resources most likely receives an increase in death rates.
-TTL
Answer:
The science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
