Which arrows represents the phase transitions in which he's energy is gained

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

How many more valence electrons does sodium need to have a full outer valence shell

How are casts formed by decaying organisms? organisms turn into rock over time. organisms leave carbon residue on a rock. organisms leave impressions in sediment that hardens into rock. impressions left by organisms are filled in with sediment that hardens into rock.