Suppose an "atp" molecule was floating in outerspace. i break it into two pieces ("adp" "phosphate"). did energy need to be added or did it get released?

The energy was released.

Explanation:

The ATP molecule (Adenosine triphosphate) is known as the energy-storing molecule in biological systems. Its structure consists in an adenosine nucleoside bonded to three phosphoryl groups, as you can see in the attached image. In ATP the bonds between the phosphoryl groups are high energy bonds, which means that the electrons in that bond are in a high energy state, so if that bond gets broken, those electrons would pass from the high energy state to a lower energy state, and in order to get to that lower energy state they would have to release energy. What usually occurs is that in presence of water (H2O), the ATP molecule gets hydrolyzed and one of the phosphoryl groups is liberated and turned into phosphate molecule (the P-O bond was broken and the energy was released), so the ATP molecule becomes an ADP molecule.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..