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Unit A: Mix and Flow of MatterScience 8
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FLUIDS ARE USED IN TECHNOLOGICAL DEVICES AND EVERYDAY MATERIALS
Section 1.0
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Fluids
• Fluids are used in technological devices and everyday materials.
• Example: A hydraulic system uses fluids under pressure to move loads.
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WHMIS Symbols and Safety ProceduresTopic 1.1
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What’s wrong with this picture?
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Hazardous Materials• All hazardous materials
have a label showing a hazard symbol.• Examples: Cleaning fluids,
paint
• The hazard symbol has a safety warning and a shape to indicate how hazardous a material is.
• There are two pieces of information for each symbol:• The shape of the symbol:
• yellow triangle = caution• orange diamond = warning• red octagon = danger
• The picture inside the shape indicates the type of hazard:• Flammable hazard• Toxic hazard• Explosive hazard• Irritant hazard• Corrosive hazard• Biological hazard• Electrical hazard
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WHMIS
• WHMIS stands for Workplace Hazardous Materials Information System
• It is another system of special symbols on hazardous materials designed to help protect people who use potentially harmful materials at work.
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Understanding Lab Safety
In order to participate in labs and activities in this class, particular attention needs to be paid to class rules and procedures:• Read all written instructions before doing an activity.• Listen to all instructions and follow them carefully.• Wash your hands carefully after each activity and after handling chemicals.• Wear safety goggles, gloves, or an apron as required.• Think before you touch. Equipment may be hot and substances may be
dangerous.• Smell a substance by fanning the smell toward you with your hand. Do not put
your nose close to the substance. Do not taste anything in the lab.• Tie back loose hair and roll up loose sleeves.• Report all accidents and spills immediately to your teacher.• If there are WHMIS (Workplace Hazardous Materials Information System) safety
symbols on any chemical you will be using, make sure that you understand all the symbols.
• Show respect and concern for your own safety and the safety of your classmates and teachers.
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Homework!
• Check and Reflect
• Page 12
• # 1, 2
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The Many Uses of Fluids Topic 1.2
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Fluids
• A fluid is anything that has no fixed shape and can flow.
• Usually, a liquid or a gas
• Examples: Water, soft drinks, laundry detergents
• Fluids make it easier to transport, process, and use different kinds of materials (including solids).
• Fluids take the shape of their containers, so many things we use and see as solids were originally prepared as fluids.
• Example: glass used for bottles, or windows
• Example: steel consists of iron, carbon, and small quantities of other substances and is heated to 1650°C to melt everything together and shape it into the desired form, before being cooled
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Slurries
• A slurry is a mixture of waterand solids.
• Slurry technology is the transport of solids in water, and is used in many applications.
• Example: mining oil sands. Syncrude is one of the world’s largest producers of oil from oil sands. They create an oil-sand slurry at the mine site and pumps this slurry through pipelines to the processing plant.
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Fluids Can Hold Other Materials• Fluids can spread or flow and carry other materials.
• Example: toothpaste! Most toothpaste contains powdered materials, to polish and clean your teeth. Substances called binders (made from wood pulp) keep the paste mixed.
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Homework!
• Check and Reflect
• Page 16
• # 2, 3
• Section Review
• Page 17
• # 1, 3, 5
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