Answer is d because after the big bang the carbon dioxide levels changed dramaticly
Answer: Common industrial contaminants include sulfur dioxide and other acids, heavy metals and industrial solvents. Iron and steel production and mining operations can also pollute water with ammonia, cyanide and arsenic.
Explanation:
I don’t understand where the .# are coming from.
I believe that the answer is A.
Answer: When asteroids enter the atmosphere of Earth or any other planet, they are called meteorites. Typically, asteroids are too small to form a circular shape, unlike dwarf planets or comets.
Explanation:
Why are meteoroids not considered dwarf planets?
<em>Key difference: A dwarf planet is “a celestial body in direct orbit of the Sun that is massive enough for its shape to be controlled by gravitation, but that unlike a planet has not cleared its orbital region of other objects.” An asteroid, on the other hand, is a large chunk of rock that orbits around the sun.</em>
