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States of Matter – Liquids

Physical Science - Middle School

 
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Sweet Honey GLUE viscosity ow glue honey oil milk water high low slow fast States of Matter: Liquids Liquids Liquid matter can change its shape, but it always has a definite volume. For example, if you pour 200 ml of milk from a carton into a measuring cup and an equal amount into a flask, the shape of the liquid will be different in the two containers, but the volume will stay the same. 1 cup 1 2 200 mL Similar to a solid, the particles in a liquid are packed closely together. However, unlike a solid, the particles in a liquid can slide past each other. This sliding motion allows a liquid to flow, or be fluid, and take on the shape of its container. Surface Tension Many liquids, such as water, form droplets. These droplets are caused by surface tension, which occurs when the molecules at the surface of the liquid form a strong attraction to each other and to the water molecules below them. This attraction can form a layer on the surface of the liquid. 1 cup 1 2 200 mL droplet surface surface tension Surface tension is what allows lightweight insects to actually walk across the surface of a pond. The surface tension of different liquids varies. For example, alcohol has a lower surface tension than water. Viscosity Viscosity is a property of liquids. Basically, viscosity means a liquid’s resistance to flow. Liquids with higher viscosity flow more slowly, like honey. Liquids with lower viscosity flow more quickly, like water. Shown are some examples of liquids and their relative viscosities. © Copyright NewPath Learning. All Rights Reserved. 94-4830 Visit www.newpathlearning.com for Online Learning Resources. surface tension droplet surface
Liquids Solids Pause and Review Compare and contrast liquids and solids in the Venn Diagram below. © Copyright NewPath Learning. All Rights Reserved. 94-4830 Visit www.newpathlearning.com for Online Learning Resources. States of Matter: Liquids
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