The correct answer is - They formed long ago, and erosion has beveled them to their present elevation.
The Appalachian Mountain Range is one of the oldest mountain ranges on the planet. They have formed in the Ordovician Period, around 480 million years ago. When they formed and were at their peak, the Appalachians were much larger and higher than what they are in the present. The reason for their decline in size is attributed to the erosion. The erosion is a process that removes the material from its original position. This process has been influencing, at different rates, the Appalachians for almost half a billion years. Even though the erosion is not a process that acts very quickly, when put the time that it influenced these mountains we will see that it managed to lower them significantly. That process continues in the present, and in the manner in which the continents are moving, there shouldn't be any force that will help lift up the Appalachians again, but instead they will continue to shrink until they are flattened in the distant future.
Answer:
The correct answer is - all of the answer choices.
Explanation:
In an ecosystem, there are various organisms that are grouped in different trophic levels and groups such as producers, consumers, scavengers or decomposers based on their function and position on the food and energy chain.
The food energy is created by producers and is passed to consumers, scavengers, and decomposers of all the organisms. Energy moves in only one direction in any ecosystem. Energy is passed from producers to one trophic level or energy level, to organisms in the next trophic level.
Water<span> sinks in high-lat </span>regions<span>, initiating </span>deep<span> currents that help regulate plant's . north atlantic ocean</span>
Answer:
killer whale
Explanation:
the killer whale is the only thing that wasn't eaten by something else, so it isn't prey
