Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The Water Cycle There are two ways water gets back into the atmosphere—from ________ and _______. In the water cycle, plants release water back into the atmosphere. This part of the water cycle is called ________________. The Carbon Cycle In the carbon dioxide cycle, carbon dioxide is returned to the atmosphere primarily by the activity of _______________. The Carbon Cycle In the carbon cycle, most carbon dioxide is removed from the atmosphere by what process? The Greenhouse effect is increasing on Earth because increasing __________ __________ traps more heat. The NITROGEN CYCLE In the nitrogen cycle, what type of organism is most responsible for keeping the cycle going? In the nitrogen cycle, What is the role of bacteria that live on the roots of plants? They change __________ into ________ in a process called… When an organism dies, the nitrogen in its body is released by the action of bacteria that act as _____________. The phosphorous cycle is the only cycle in which the chemical does not enter the ________________________. When an ecosystem is limited by a single nutrient that either is scarce or cycles very slowly, this substance is called a ________ When an ecosystem is limi ted by a single nutrient that either is scarce or cycles very slowly, this substance is called a ______________________________. Human Impact Some pollutants cycle through organisms and build up to thousands of times more concentration high up on the food chain.