Transcript Ductility-the ability to be stretched into wires

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 PointTemperature at which a liquid turns to gas AND
Temperature at which a gas turns to a liquid (__.P)
Substance
Helium
Oxygen
Mercury
Water
Lead
Gold
Melting/freezing
pt.
-272C
-218C
-39C
0 C
327C
962ºC
Boiling/condensing
pt.
-269C
-183C
357C
100C
1749C
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
Helium
Oxygen
Mercury
Water
Lead
Gold
Melting/freezing
pt.
-272C
-218C
-39C
0C
327C
962ºC
Boiling/condensing
pt.
-269C
-183C
357C
100C
1749C
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.)