Question

primary succession: a volcano erupts covering the surrounding area in several feet of ash. new land forms as a lava flow cools. lichens and mosses forming new soil in an area for the very first time. secondary succession: the regrowth of an ecosystem after a nuclear meltdown causes the soil to be replenished many years before the soil is replenished. grasses and small plants begin to grow from new soil. possible answers: a predictable series of events that occurs after a disturbance in an existing ecosystem. the renewal of crops that occurs in a section of farmland that is harvested every year. a severe windstorm knocks down many trees, but the soil is not damaged. a series of predictable changes that occur over time in an area where no ecosystem currently exists. press enter or space to change selection

Explanation:

Primary succession occurs in an area where no ecosystem currently exists, like when new land forms from cooled lava flow and lichens and mosses start to form new soil. Secondary succession happens in an existing ecosystem after a disturbance. A severe wind - storm knocking down trees with undamaged soil and the renewal of crops in harvested farmland are examples of secondary succession as the soil and some elements of the ecosystem remain. The regrowth of an ecosystem after a nuclear meltdown is also secondary succession as there was a pre - existing ecosystem.

Answer:

Primary Succession: A volcano erupts covering the surrounding area in several feet of ash; New land forms as a lava flow cools; Lichens and mosses forming new soil in an area for the very first time
Secondary Succession: A severe windstorm knocks down many trees, but the soil is not damaged; The renewal of crops that occurs in a section of farmland that is harvested every year; The regrowth of an ecosystem after a nuclear meltdown causes the soil to be replenished many years before grasses and small plants begin to grow from new soil