In this unit, learners continue to develop their observation skills and knowledge about the world of water by exploring types of streams. The first activity, Draw a Stream, reinforces the process of drawing in a field journal, while the subsequent lessons and final activity guide students in thinking about stream formation and the concept of a watershed, the latter of which is investigated using a simple model.
Rainfall helps to shape the land and affects the types of living things found in a region. Water, ice, wind, living organisms, and gravity break rocks, soils, and sediments into smaller particles and move them around.
Nearly all of Earth’s available water is in the ocean. Most fresh water is in glaciers or underground; only a tiny fraction is in streams, lakes, wetlands, and the atmosphere.
Models can be used to represent systems and their interactions—such as inputs, processes and outputs—and energy and matter flows within systems.
Make observations and/or measurements to produce data to serve as the basis for evidence for an explanation of a phenomenon or test a design solution.