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Topic 1

Topic 1. Exploring Matter. Safety Symbols. Symbol Shapes: These shapes and their colours indicate how dangerous a substance is. . Safety Hazard Symbols. WHMIS Symbols WHMIS (Series: SafetyCare) learn alberta 15 minutes http://www.learnalberta.ca/content/ctm/index.html?smil=whmis.

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Topic 1

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  1. Topic 1 Exploring Matter

  2. Safety Symbols • Symbol Shapes: These shapes and their colours indicate how dangerous a substance is.

  3. Safety Hazard Symbols

  4. WHMIS SymbolsWHMIS (Series: SafetyCare) learn alberta 15 minuteshttp://www.learnalberta.ca/content/ctm/index.html?smil=whmis • What does WHMIS stand for? • Workplace Hazardous Materials Information System

  5. Lab Safety Rules

  6. The Particle Model of Matter • All matter is made up of extremely tiny particles • Each pure substance has its own kind of particle, different from the particles of other pure substances • Particles attract each other • Particles are always moving • Particles at higher temperatures move faster on average than particles at lower temperatures

  7. Classifying Matter • Attractive forces between particles are weakest in gases, stronger in liquids, and strongest in solids. • http://www.youtube.com/watch?v=KCL8zqjXbME&feature=fvwrel (5 min)

  8. Classifying Matterhttp://www.youtube.com/watch?v=WB0Kr8VA-74(3 min)

  9. Classifying Matter • Pure Substances • Elements • A material that cannot be broken down into any simpler substance. Elements are the basic building blocks for all compounds. Elements are organized onto the periodic table according to their properties. • Ex. Hydrogen (H), Carbon (C), and Oxygen (O) • Compounds • When two or more elements combine chemically. When hydrogen and oxygen are combined in specific proportions, they form the compound water. • Ex. Water (H2O), Carbon dioxide(CO2)

  10. Classifying Matter • Mixtures • Homogeneous Mixtures (solutions) • The different substances that make it up are not separately visible. One substance is dissolved in another. • Substances dissolved in water are called aqueous solutions • Ex. See table. • Heterogeneous Mixtures (mechanical mixtures) • The different substances that make up the mixture are visible. • Ex. Soil • Suspensions • A cloudy mixture in which tiny particles of one substances are held within another. • Ex. Tomato Juice – These particles can be separated when poured through filter paper. • Colloids • A cloudy mixture in which the particles of the suspended substance are so small that they cannot be easily separated out from the other substance. • Milk – These particles cannot be easily separated. • http://www.youtube.com/watch?v=U50qw3HTvc4&feature=related] Classifying matter song

  11. Classifying Matter • One way to tell the difference between a solution and a colloid is to shine a light through them. A solution will not allow the light to scatter. A colloid will scatter the light because the particles are larger than those in a solution. • The light scattering property of colloids is called the Tyndall effect. http://www.dnatube.com/video/11145/The-Tyndall-Effect

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