How are coral reefs formed? what factors are bringing about the large-scale decline of coral reefs around the world? what measures must be taken to prevent future loss of remaining coral reef habitat?

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine

You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone, pumice, and gneiss.

The standard deviation of a population is 3.2.what is the margin of error? enter your answer in the box.