The higher you are from sea level, the atmospheric pressure will be?

As altitude increases, the atmospheric pressure decreases. This phenomenon occurs because the density of air decreases with height, leading to fewer air molecules above a given surface area as one ascends. At sea level, atmospheric pressure is at its maximum due to the weight of the entire column of air above. As you move higher into the atmosphere, such as while climbing a mountain or flying in an airplane, the reduction in the amount of air overhead results in lower pressure. This principle is fundamental in various applications, including meteorology, aviation, and even the functioning of certain machinery and processes where pressure changes can affect performance and safety.