Khethiwe Mdluli ECE 8814/02 Kennesaw State University

Georgia Performance Standards Essential Questions The phases of matter -solid -liquid -gas Physical properties Chemical properties How is matter measured –Mass –Weight –Gravity Structural components of matter -Atoms -Elements -Molecules -Metals Concentration game References

S5P2: Students will explain the difference between a physical change and a chemical change.

Essential Questions What is matter? How can matter change? What is a property?

Matter Matter is anything that takes up space. A compass, computer, and map are a few of the material things, or things made of matter in the world.

Matter is everywhere. It occupies space and it has mass. Matter SolidLiquidGas /

These phases are distinguished by the arrangement of particles (atoms and molecules) in each kind of matter. SOLID The particles of a solid are arranged in a rigid structure. Every solid has a precise shape and volume. LIQIUD The particles of liquids are a little further apart than those of solids. Liquids have a precise volume, but a variable form. GAS The particles of a gas have no fixed position. They are constantly moving

Melting and Boiling Points Temperature in Celsius

Properties There are 2 types of properties: Physical and Chemical. Brandon can tell one kind of matter from another by observing its properties.

Physical Properties Bob’s favorite food is blue pyramid and smells like cookies. These are examples of physical properties.

vity/states_of_matter/ Matter has physical properties and chemical properties. Physical properties of matter –Color –Ductility –Malleability –Hardness –Smell

Chemical Properties If you burned your reading book it would break down into substances, such as hydrogen and carbon, that could not be combined again. (But of course we would never do that!!)

Chemical properties of matter Chemical properties are only observable during a chemical reaction. Flammability (wood, gasoline) Reactivity with oxygen (rusting

Mass A physical property that every elephant possesses is mass. The amount of mass in a shark will never change when the object is moved from place to place.

Gravity The greater the mass of an object, the more strongly it attracts other objects. The weight of a T rex would be heavier on earth than on the moon, because the earth’s mass is larger than the moon’s

Weight A physical property that is related to mass is weight. The weight of a bird may change if it is moved to Uranus because weight is determined by gravity.

Atoms Atoms are the basic building blocks of all the chalk around you. It is the smallest particle of matter that can enter into chemical combinations with other particles.

Elements Elements are pure substances, made from one type of atom. soda can be broken down into many elements but nitrogen can not be broken down.

Molecules Atoms make up molecules. Molecules make up a hairy eagle.

Metals Gold, silver, copper, and iron are examples of metals. A gold diamond is shiny because of its metal properties.

Properties of Metals Gold conducts heat and electricity. Nickel can be hammered into thin sheets without breaking. Platinum can be pulled into wire.

Nonmetal The helium in my Christmas balloon is a nonmetal. The Oxygen in the air is not shiny because of its nonmetal properties.

Properties of Nonmetals A dog cannot conduct electricity. A snap dragon cannot be hammered into thin sheets. A snicker cannot be pulled into wire because they are not metals.

Metalloids Metalloids have properties of both metals and nonmetals. Silicon is a metalloid that can be found in many materials such as the sand on Lake Tahoe the glass in my vase and certain plastics that make up my favorite toy, car.

Concentration game

References 1.ppthttp:// 1.ppt lhttp:// l atismatter.htmlhttp:// atismatter.html