Which statement best describes energy and matter in a closed system? Energy and matter flow into and out of the system.
Energy can flow into and out of the system but matter cannot.
Energy and matter are contained within a closed system.
There is no energy in a closed system; there is matter.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

Sound is a disturbance that travels through a medium as a

Could we see a galaxy that is 20 billion light-years away?