Astudent made a model of an ecosystem inside a sealed plastic bottle. she placed soil, rocks, water, plants, and animals inside the bottle. how is the model different from a natural ecosystem? a. the model lacks producers. b. the model has more consumers. c. the model lacks diversity. d. the model has more predators.

Use the drop-down menus to match each part of the scenario to the correct scientific practice. akira records the speed of a reaction without a catalyst and then with a catalyst. akira creates a reaction without a catalyst and repeats the reaction with a catalyst. akira turns in a written lab report to his science teacher. akira wonders, "will adding a catalyst speed up this chemical reaction? " akira writes in his notes that adding a catalyst sped up the chemical reaction because the catalyst lowers the activation energy needed to get the reaction started.