Many coastal communities oppose the proposal to set up tidal plants, even though they recognize that the solution to the current energy crisis could be tidal power. Which of these statements best describes the possible impact of using tidal power on these communities? (4 points)

Jenna began making a model to show the processes which resulted in the formation of oceans. Which of the following best describes the next step in the process? (4 points)

Garrett notices a small island has formed off the coast of his hometown in Florida. Which of the following best describes what caused the island to form? (2 points)

Which of the following is a term used to describe the place at which the continental crust ends and oceanic crust begins? (2 points)

Examine the following image. Which ocean-floor feature is indicated by the arrow in the image? (2 points) Public Domain

What is most likely true about ocean temperatures surrounding Africa, which is marked by the star in the following map? (2 points) Public Domain

Which of the following oceans separates Africa and Australia? (2 points)

The diagram below shows some ocean floor features. Which of these statements is correct about the feature labeled A in the diagram? (4 points)

The graph below shows the radioactive decay of two materials. Based on the graphs, which of these statements is correct about Material 1 and Material 2? (4 points)

The table below shows the initial and final masses of a radioactive material whose half-life is 15 years. Initial mass (in kilograms) 0.8 Final mass (in kilograms) 0.05 Based on the table, which of these conclusions is correct? (4 points)