Find your seats and take out your notebook. Agenda for Wednesday Dec. 8 th 1.Books 2.Matter notes 3.Mixtures lab

Books and other Resources Name Book # Condition (pages, bent covers) What I should know about you/something interesting

Composition of Matter Matter – anything that has mass and takes up space Element – substance that cannot be separated or broken down into simpler substances Atom – smallest unit of an element that maintains the properties of that element Compound – substance with 2 or more different atoms

Compounds Molecules – smallest unit of a compound that still maintains the properties of the compound Chemical Formulas

Mixtures Pure substances – only 1 element or compound Mixture – combination of 2 or more substances – Homogenous – contains substances blended evenly throughout – Heterogeneous – a mixture of different substances that can easily be distinguished from each other

Homogenous Mixtures Solution = homogenous mixtures with particles so small that they cannot be seen with a microscope and will not settle to the bottom of the container – Salt water – Sugar water

Heterogeneous Mixtures Colloid = suspension or emulsion where particles will not settle out of the mixture on their own – Milk, fog, and smoke are all colloids Tyndall effect – scattering of light by larger particles

Heterogeneous Mixtures Suspensions - heterogeneous mixture in which visible particles will settle – Muddy water – the particles are “suspended” in the liquid for a short period of time but then settle out

Number of Substances 1 substance 2 Substances Pure Substance Mixture Separates readily/on its own Suspension No visible particles, Looks uniform throughout Won’t separate by physical means Solution Visible particles/cloudy Colloid Won’t separate on its own/cloudy Heterogeneous mixture Homogeneous Mixture

Define homogeneous and heterogeneous mixtures. Agenda for Thursday Dec 9 th 1.Properties of Matter Notes 2.Physical vs. Chemical Change demos 3.Concept Review Sheet

Properties of Matter Physical – characteristic of a material you can manipulate without changing the identity of a substance – color, shape, size, density, melting point, and boiling point Physical Change - a change in size, shape or state of matter – dissolving

Properties of Matter Chemical - characteristic of a substance that indicates whether it can undergo a certain chemical change – New substances produced – Reactivity, flammability (ability to burn) Chemical Change - change of one substance to another. – accompanied by heat, light, color, and sound

States of Matter Kinetic Theory – All matter is made of atoms and molecules – These particles are always in motion. Higher temp = faster movement – At same temp., heavier molecules move slower 3 different states of matter – Solid, liquid, gas