Product Description: Most arches built today contain a single building block at the top that is the most important piece. This special piece can be found in the arches of soaring cathedrals, doorways in temples, and even simple buildings made out of wooden blocks...read more

Product Description: Some keystone species are large, like white rhinos, while others are quite small, like honey bees. But size doesnt matter in an ecosystem. All living things rely on other species to survive. A keystone species plays an especially large role that affects many different species in an ecosystem...read more

Product Description: Most arches built today contain a single building block at the top that is the most important piece. This special piece can be found in the arches of soaring cathedrals, doorways in temples, and even simple buildings made out of wooden blocks...read more

Product Description: A Kids Guide to Keystone Species in Nature focuses on several ecosystems such as those found in the mountains. This book meets several of the Next Generation Science Standards (NGSS) along with Common Core Standards for grades 3, 4 and 5.

Product Description: A Kids Guide to Keystone Species in Nature focuses on several ecosystems such as those found in grassland. This book meets several of the Next Generation Science Standards (NGSS) along with Common Core Standards for grades 3, 4 and 5.

Product Description: Trophic cascades—the top-down regulation of ecosystems by predators—are an essential aspect of ecosystem function and well-being. Trophic cascades are often drastically disrupted by human interventions—for example, when wolves and cougars are removed, allowing deer and beaver to become destructive—yet have only recently begun to be considered in the development of conservation and management strategies...read more