In virginia and some other parts of the world, water has carved vast caverns out of underground limestone deposits. water, however, must contain dissolved carbon dioxide in order to break down the limestone. what role does the carbon dioxide play?

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.