Based on radiometric dating, the oldest rocks scientists have found on earth are 4.6 billion years old, but not all rocks are that old. why might some rocks be 4.6 billion years old, and other rocks are only 2 billion years old, while yet others are only a few thousand years old? include an example and the names of at least 2 rock types and how they are formed.

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.