What is most likely to occur during a chemical reaction? a Molecules of the original substance are lost. b New atoms are created. c The original substance maintains its properties. d Mass is conserved.

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals