Topic 1 Exploring Matter Safety Symbols Symbol Shapes

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: Safety. Care) learn alberta 15 minutes http: //www. learnalberta. ca/content/ctm/index. html? smil=whmis What does WHMIS stand for? Workplace Hazardous Materials Information System

Lab Safety Rules

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

Classifying Matter Attractive forces between particles are weakest in gases, stronger in liquids, and strongest in solids. http: //www. youtube. com/watch? v=KCL 8 zqj. Xb. ME&feature=fvwrel (5 min)

Classifying Matter http: //www. youtube. com/watch? v=WB 0 Kr 8 VA-74 (3 min)

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 (H 2 O), Carbon dioxide(CO 2)

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=U 50 qw 3 HTvc 4&feature=related] Classifying matter song

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