Which of the following most likely happens during a physical change? a) an irreversible process takes place. b) substance changes its form but not its molecular composition. ( i think maybe it's this one) c) new atoms are introduced in the molecules of the substance. d) a substance reacts differently with a chemical before and after the change. which of the following represents a chemical change? a) souring of milk (maybe this one? ) b) melting of chocolate c) condensation of water d) breaking of an egg shell

Sea levels are rising due to climate change while increasing numbers of people are moving into coastal areas. to accommodate more people, there has been increased construction of beachfront resorts and condominiums. how is this impacting sea turtle numbers and biodiversity and why? a. the increased human population in coastal areas has meant that more food is available to the turtles (e.g., dropped food, waste from restaurants), which has led to an increase in the numbers and diversity of sea turtles. b. there has been very little change in the numbers and biodiversity of sea turtles because the planet is so vast that they can simply relocate to less crowded beaches. c. this has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction. d. this has resulted in an increase in numbers and diversity of sea turtles because people are around to protect them from natural predators.

During convection, less dense fluid rises and denser fluid sinks.

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land