What causes the pressure inside oxygen tanks to change as they are filled

Chemistry Partial ... The presence of more oxygen molecules.

Explanation:

When you heat up a gas, the molecules that the gas is made up of move faster. ... This causes the molecules in the air in the tank to move faster. Unlike the balloon which would expand, the tank is a rigid container that will not expand. This increase in motion then raises the pressure inside the tank.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.