Describes how species interact, how members of the same species and other species compete, and invasive species, while introducing various types of graphic orga

Uses graphs and charts to show how plants, animals, and the environment are interdependent.

Using graphic organizers, compares plant and animal cells, describes how plants and animal perform similar life processes, and explains how plants and animals s

Short of intergalactic travel or aliens landing on Earth, it may seem there is no way for us to learn about extraterrestrial life. However, as this captivating

Discusses the effects and dangers of tobacco, its damaging physiological effects on the mind and body, and how to quit using it.