Unit 1 Mix and Flow of Matter

Notes

•Rafting Rafting offers an exhilarating experience as you sweep down a river, maneuvering against the power of rapids. You feel the pull of swirling pools and the invigorating spray of water. Water flowing in a river exemplifies fluidity—the ability to flow. Wind is another natural example of a flowing material. Water, air, blood, and other materials capable of flowing are called fluids. Non-fluid materials can behave like fluids if melted or dissolved in fluids. You rely on fluids such as water and air daily: air enters your lungs, materials are absorbed into your body after dissolving in water, and blood transports nutrients and wastes. Fluids can also do work; when they move, they exert force that can be harnessed to operate machinery. Enclosed gases, like in tires or bubble wrap, absorb impact forces. Explore this unit to understand how much the technological world depends on fluids and matter’s ability to mix and flow. •Mix and Flow of Matter This unit covers the properties of fluids, how they mix and separate, and the technologies that depend on them. Topics include matter in motion, mixing and dissolving, separating Earth’s mixtures, flow rate and viscosity, density, ...