(a) if the seawater carbonate ion concentration is 270 ? mol/kg, what is the approximate rate of calcification, and approximately how many days would it take 1 square meter of reef to accumulate 30 mmol of calcium carbonate (caco3)?

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Anton created a chart listing different types of materials. which best complete the chart?