Describes how force and gravity set objects in motion and how they influence the velocity and direction of moving objects. Also discusses the perception and measurement of motion.
Explains the need for standard units of measure and suggests simple experiments that demonstrate the use of these units in measuring distance, volume, and weight.
A fundamental study of plants and animals, their environment, and their interdependence with simple experiments illustrating the basic principles of living things
Uses panoramic storyboard sequences with cutting-edge digital illustrations to help readers dive in and learn in a whole new way as the action unfolds, and includes definitions on every page to help readers increase their vocabulary as they read.