Activity B: Get the Gizmo ready:

• Click Reset.

• On the SIMULATION pane, make sure Ample is

selected for the amount of LAND available.

Density-dependent

limiting factors

Introduction: Population density is the number of individuals in a population per unit of area. Some limiting

factors only affect a population when its density reaches a certain level. These limiting factors are known as

density-dependent limiting factors.

Question: How does a density-dependent limiting factor affect carrying capacity?

1. Think about it: What do you think some density-dependent limiting factors might be?

2. Predict: Suppose a shopping mall is built near a rabbit warren, leaving less land available for rabbits. How

will this affect the environment's carrying capacity?

3. Experiment: Use the Gizmo to find the carrying capacity with Am

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

i dont know it at allnow im just getting points at this pint

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.