Which of the following correctly orders the layers of the atmosphere from lowest to highest? a. troposphere, stratosphere, mesosphere, ionosphere b. ionosphere, stratosphere, mesosphere, troposphere c. thermosphere, stratosphere, mesosphere, troposphere d. stratosphere, troposphere, mesosphere, thermosphere

The answer for #3 is c but i don't know why

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.