Answer:
c. oxygen
Explanation:
Rusting occurs when iron reacts with oxygen in the presence of water. Rusting is an oxidation reaction and is characterized by a reddish brown color.
Hope that helps. :)
D
The amount of material that has not decayed
It’s A. Sorry if I was incorrect :)
Answer:
Also, because Earth formed as part of our sun's family of planets – our solar system – scientists use radiometric dating to determine the ages of extraterrestrial objects, such as meteorites. These are space rocks that once orbited our sun, but later entered Earth's atmosphere and struck our world's surface.
Explanation:
The answer is A, four weeks (the lunar cycle is about 29.5 days).