Akind of variable that a researcher purposely changes in an investigation
constant.
controlled.
dependent.
independent.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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