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: The same thing is true in nature. Certain species of animals and plants are so important to their ecosystems, that if they disappear, the whole system may collapse. They are called keystone species.

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.