Presentation on theme: "Chemistry : Introduction to Matter"— Presentation transcript:
1 Chemistry : Introduction to Matter 1.1 Describing Matter
2 matter Anything that has mass and takes up space Hold up something that is an example of matter.
3 Write 3 examples of substances. Properties of MatterChemistry - the study of the properties of matter & how matter changesSubstancea single kind of matter that is pureAlways has a specific make-up & specific set of properties.Write 3 examples of substances.
4 What are the 2 kinds of properties every form of matter has? Physical Properties & Chemical Properties
5 Physical PropertiesA characteristic of a pure substance that can be observed w/out changing it into another substanceEx: water freezing (solid), water (liquid), water vapor (gas)Hardness, texture, color, ability to dissolve, luster, conductivity, magnetism, flexibilityPhysical properties can be used to classify matter.
6 Chemical PropertiesA characteristic of a pure substance that describes its ability to change into different substancesTo do this you must try to change it into another substance.Flammability, oxidation, tarnishingChemical properties be used to classify matter.
7 Chemical PropertiesWhen wood burns, what element does it combine with?Oxygen!Flammability is a chemical property of wood.
8 Chemical Properties What new substances are produced? Carbon dioxide & ashFlammability is a chemical property of wood.
9 Chemical PropertiesWhen iron rusts, what element does it combine with?Oxidation is a chemical property of iron.Oxygen!
10 Chemical Properties What new substance is produced? Rust AKA Iron oxide!Oxidation is a chemical property of iron.
11 Element – pure substance that cannot be broken down into any other substance
13 How can you tell one element from another? By theirchemical & physical properties!
14 Atoms The basic particle from which all elements are made. building blocks of matterCan combine w/ other atoms through chemical bondsMolecules – groups of 2 or more atoms held together by chemical bonds
15 Meet Molly CulePop star Molly Cule has dropped her car off at Ms. Frizzle’s car wash before her concert. We join her class just after they were shrunk to examine the dirt on the car AFTER it was washed.Click picture for 5 minute video
16 Atoms In this figure, what does each sphere represent? An atom How many atoms in a molecule of water?3 atomsHow many atoms in a molecule of oxygen?2 atoms
17 Atoms What elements make up water? Hydrogen and oxygen What elements make up carbon dioxide?Carbon & oxygenWhat holds atoms together?Chemical bonds
18 CompoundsA pure substance made of 2 or more elements chemically bonded togetherWhen elements combine, they form compounds w/ different properties than their original properties.What is the ratio of atoms in these compounds?CO2 CO H2O1 to 21 to 12 to 1
19 100 Greatest Discoveries Let’s review oxygen, atoms & molecules Click here for this 8 minute video.
20 Mixtures2 or more substances together in the same place but not chemically combinedEach substance keeps its original properties
21 Heterogeneous mixture Easily separatedYou can see all the different partsWhich of these pictures shows a heterogeneous mixture?
22 Homogeneous mixtureMixed so evenly you cannot see all the different partsWhich of these pictures shows a homogeneous mixture?
23 Heterogeneous OR Homogeneous? Sugar watersaladbrassairhomogeneoushomogeneous
24 Separating MixturesEasy to do because each component keeps its own propertiesSeparate through magnetic attraction, filtration, distillation or evaporation (see fig. 10)
25 And now back to Ms. Frizzle’s class… Click picture for the 5 minute continuation of the Magic School Bus video.