Abiotic factors are chemical or physical environmental factors in an ecosystem. In order to test how the different components effect the environment there are many tests that can be preformed. For example to test the soil one could take one species of plant and grow it in three or four different soil types. This would be interesting depending on what plant one chooses to preform the experiment on, because different species of plant have adapted to different kinds of soil. Think of a cactus verses a sunflower and how their soil differs. To keep the results accurate try to water them equally and make sure they are exposed to same amount sunlight. Another experiment is on sunlight could be done by growing four different plants. Place one in direct sunlight, one in semi-shade, one in indirect sunlight and the last without light. Then monitor the growth of the amount of plant growth. This experiment will also need to keep some constant components like the water and soil. These two experiment will isolate different key factors in an ecosystem