<h2><u>Answer:</u></h2>
Researchers can decide whether oxygen existed in Earth's Archean air by searching for oxidized iron in rock. In the first place, there was just an almost no oxygen in the air. The oxygen that are being created by cyanobacteria is sufficient for the enduring procedure.
There will sufficiently just oxygen that will stay in the climate when the stones at the surface are appropriately and enough oxidized. In any case, as time passes by, confirmations said that the measure of oxygen in the Archean air is really expanding in a moderate enduring pace.
There's a subtle point involved here that I'll try to explain, and
I hope you catch my explanation:
A real scientist does NOT "use evidence to support his theory".
That would mean that he dreamed up his theory, then he went
around observing the world and nature, and he wrote down and
took pictures of things he saw that supported his theory, and he
ignored anything that didn't support it. This is exactly how science
does NOT work. Anybody who operates that way is laughed out
of science and you never hear about him again.
The way science works is exactly the opposite: The curious
investigator observes the world and the things around him. He
sees how things actually work. That's the 'evidence'. Eventually
he comes to the point where he's ready to build a theory of WHY
or HOW things work the way they actually do.
The theory is built to explain the evidence. The evidence is not
used to support a theory. And after the theory is offered, the next
step is to test the theory and see if it's worth anything.
Wegener observed that m<span>ountain chains are continuous across
continents, and he learned that similar fossils have been found
on different continents. When he saw these and other facts, he
eventually offered the theory of continental drift, to EXPLAIN the
evidence.
I only see 5 points. Where are the other 19 ?
</span>
Answer:
A) The Northeast
Explanation:
found this online: https://www.coursehero.com/file/12138497/Ch-4-Quiz/
It should be A!
I hope all is well. (:
The Rocky Mountains. They are also the second longest mountain range in the world.
