Ecological succession occurs when older communities of plants and animals are replaced by newer communities, whereas the ecological pyramid deals with the relationship between the number of primary ...

In biology the relationship of what eats what and how energy passes through an ecosystem is called a food chain. Pyramids can help give us an overall picture of a particular food chain. They can ...

Schools sometimes teach “fact families:” triangles that connect three numbers based on their sum and differences. For example, the triangle below expresses the series of relationships: 5 + 3 = 8, 8 - ...