Demo #1: Tearing Paper Does the paper change its chemistry (chemical identity) and form a new substance with different properties? Is the ability to be.

Demo #1: Tearing Paper

• Does the paper change its chemistry (chemical identity) and form a new substance with different properties?

• Is the ability to be torn a physical or chemical property? – Physical Property: Property that can be

tested/observed without changing chemical identity of the substance; can be undone

• Is tearing a physical change or a chemical change?

Demo #2: Burning Paper

• Does the paper change its chemistry (chemical identity) and form a new substance with different properties?

• Is the ability to burn a physical or chemical property? – Chemical Property: A property that can only be

tested/observed by changing the chemical identity of a substance; hard to undo

• Is burning a physical change or a chemical change?

Adhesion- tendency of particles of different substances to attract to one another (__.P)

Boiling/Condensation Point- Temperature at which a liquid turns to gas AND

Temperature at which a gas turns to a liquid (__.P)Substance Melting/freezing

pt. Boiling/condensing

pt. Helium -272C -269C Oxygen -218C -183C Mercury -39C 357C Water 0 C 100 C Lead 327C 1749C Gold 962ºC 2162ºC

Brittleness- The tendency of a solid to break or shatter (__.P)

Cohesion- The tendency of particles of the same

substance to attract one another (__.P)

Density- Mass per unit volume; the mass of

a known volume of matter; compactness (__.P)

Ductility- The ability to be stretched into wire—

this is a property of metals (__.P)

Elasticity- The tendency of a solid substance to

return to its original form after being stretched (__.P)

Electrical Conductivity- The ability of

electricity to move through a material. (__.P)

Hardness- Ability of solids to resist being scratched . (__.P)

Luster- The “shininess” of a substance. The ability of a substance to reflect light. (__.P)

Magnetism- The ability to form a magnetic field and attract other metals (__.P)

Malleability- The ability to be pounded into flat sheets—this is a property of metals (__.P)

Mass- The amount of matter that something is made of. (__.P)

Melting/Freezing point- Temperature at which a solid turns to liquid AND Temperature at which a liquid turns to solid (__.P)

Substance Melting/freezing pt.

Boiling/condensing pt.

Helium -272C -269C Oxygen -218C -183C Mercury -39C 357C Water 0 C 100 C Lead 327C 1749C Gold 962ºC 2162ºC http://www.youtube.com/watch?v=QaJ_Yxj9bG8

http://www.youtube.com/watch?v=aRwlrFimnZk

Solubility- The ability to dissolve in another substance—how well the substance dissolves.

(__.P)

States of Matter- The physical form in which a substance exists, such as a solid, liquid, gas, or plasma.

(__.P)

Plasma

Surface Tension- Tendency of liquid particles to stick together, forming a “skin” (__.P)

Tensile Strength- a measure of how far something will stretch or bend before it cracks or

breaks (__.P)

Texture- The smoothness or roughness of a substance (__.P)

Thermal Conductivity- The ability to transfer thermal energy (heat) from one area to another

(__.P)

Viscosity- A liquid’s resistance to flow (__.P)

Volume- The amount of space an object occupies (__.P)

Ability to Burn (Flammability)- Ability of a substance to support combustion (burn) (__.P)

Ability to Rust- Ability of a metal (like iron) to bond with oxygen (from air or water) to form a new

substance (__.P)

Ability to Corrode- Ability of a substance to break down and form a new material when reacting with its

environment—water, acid, salt, etc. (similar to rusting) (__.P.)