What is the expanding universe theory and what observed astronomical evidence is used to support it?

Which process is the reverse of deposition

Which is an example of a mixture? a. water b. trail mix c. hydrogen d. carbon dioxide

David has two containers of two different gases at the same temperature and pressure. david could assume all of following except a. when the temperature is increased, the volume of both containers will increase b. when the pressure is increased, the volume of both containers will decrease c. both containers contain the same number of gas particles d. when the pressure is decreased, the temperature of both containers will increase