3.6 Review Properties of Matter

Explain the difference between the atom of an element and a compound One type of atom; cannot break it down any further w/o changing properties. Compound: Atoms evenly distributed; two or more elements fixed properties

Explain the difference between a compound and a mixture A combination of a substance that are chemically bonded Mixture: A combination of a substance that is not chemically bonded

Explain the difference between a homogeneous mixture and a heterogeneous mixture. Where you can see the parts of the mixture that are different from one another. Homogeneous Mixture Where the substances are so evenly distributed that it is hard to distinguish one substance from another.

Give an example of a homogenous mixture. Homogeneous Mixture Kool-Aid Lemonade Glass Salt Water (Seawater) Soft Drinks

Give an example of a heterogeneous mixture. Sand Salad Bottle of salad dressing Toppings on a Pizza Dirt Water

Explain the difference between a solution, a suspension and a colloid. A mixture that forms when substances dissolve and form a homogeneous mixture. Small Particles Suspensions: A heterogeneous mixture that separates overtime and into layers. Large Particles. Colloid: A mixture that contains some particles in a solution and the large particles in a suspension. Medium Particles

Give an example of each Solution: Kool-Aid, Lemonade, Salt Water Suspensions: Dirt Water, Sand Colloid: Milk, Jell-O, Butter, Fog

Define a physical property A property that can be observed without a chemical change.

List the physical properties mentioned in class and define them. Viscosity: A substances resistance to flowing Conductivity: The ability to transfer heat or electricity Malleability: Ability to be hammered without shattering Hardness: Harder materials scratch softer materials Melting Point: The point a substance changes from a solid to a liquid Boiling Point: The point a substance boils Density: The ratio of mass per volume

Define a chemical property Occurs when a substance is changing into a different substance.

List the chemical properties mentioned in class and define them. Flammability: A materials ability to burn in oxygen Reactivity: A materials ability to combine and react with other chemicals

What three changes may occur when a chemical change takes place. Change in color Production of gas Formation of a precipitate

10. Define whether each of the following is heterogeneous and homogeneous. Kool-Aid: Homogeneous Salad: Heterogeneous Salt-water

11. Define the Tyndall effect. The scattering of light by colloidal particles.

12. What is the process of distillation? The process of separating substances by evaporating a liquid and recondensing its vapor

13. 3 Physical Changes Phase Change Tearing/Breaking Weathering

14. ..3 chemical changes Tarnish Burning Alka-seltzer in water

15. What is the law of conservation of mass? The mass of all substances that are present before a chemical reaction equals the mass of all the substances that remain after the change.

Physical and Chemical Weathering Frost weathering, the freezing and breaking down of rock through expansion Acid rain combining with limestone to become calcium hydrogen carbonate

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