Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
Answer:
D) uniformitarianism; the geologic processes that operated in the past are the same as those that operate today, and they occurred in accordance with the same laws of nature that are operating today
Explanation:
When geologists conclude that the Grand Canyon sequence of rocks was formed through hundreds of millions of years of deposition, mountain building, and erosion, they are basing this conclusion on the principle of <u>uniformitarianism </u>which states that <u>the geologic processes that operated in the past are the same as those that operate today, and they occurred in accordance with the same laws of nature that are operating today</u>.
Uniformitarianism is a theory in geology which states that the changes in the earth's crust during geological history is as a result of actions of uniform and continuous processes, that the geological processes occurring currently are same processes that have been occurring in history and every part of the world and is continuous.
Your question could mean one of two different things.
You could be asking "How do I figure out the longitude and latitude
of, let's say, Killeen, Texas."
The answer to that is: You look on a map or a globe that has latitude
and longitude lines printed on it, find Killeen, Texas, and estimate its
coordinates as well as you can from the lines printed nearest to it.
Or you could be asking "If I'm out in the middle of the ocean at night,
how do I figure out the longitude and latitude of where I am ?"
I'm afraid the answer to that is far too complicated to write here.
All I can say is: The science of "Navigation" was developed over a period
of hundreds of years. If you look at the history of sea exploration through
the centuries, you see how the explorers ventured farther and farther from
their home ports as time went on. The reason for that is that they were
developing better and better methods of figuring out where they were as
they sailed.
And about 20 years ago, that all changed. Drastically. Now, anybody at all
can walk into his neighborhood sporting-goods store, and buy a little device
that fits in his shirt pocket or in the palm of his hand, and whenever he has a
view of the sky, it can give him the latitude and longitude of the place where
he's standing, more accurately than the best navigators in the US Navy or
the British Armada could ever calculate it before.
That was when countries started putting up bunches of little satellites
to broadcast signals to our pocket receivers.
The satellites that the US put up are called the Global Positioning System . . .
the GPS.
Answer:
The Southern Hemisphere is dominated by oceans, relative to the Northern Hemisphere.
Explanation: The Southern Hemisphere is dominated by maritime influences, whereas the Northern Hemisphere is dominated by continentality.
The Southern Hemisphere has much less land than the Northern Hemisphere, resulting in weaker asymmetries at its lower boundary. A more zonally symmetric circulation, with smaller-amplitude stationary waves, is thus expected. Due to the larger fraction of the ocean, the seasonal cycle will also be muted. The seasonal change in surface temperature, for example, will be smaller than in the Northern Hemisphere.
