Phase Changes (solid/liquid/gas)
Solid to Liquid
What is MELTING?
Would color fall under "Chemical Properties of Matter", or "Physical Properties of Matter"?
Chemical reactions that absorb energy
What is ENDOTHERMIC?
TRUE or FALSE: ELements cannot be broken down into smaller substances
TRUE
Always has the exact same composition and properties
PURE SUBSTANCE
Deposition: Gas to solid, energy must be
TAKEN AWAY
Would reactivity fall under "Chemical Properties of Matter", or "Physical Properties of Matter"?
CHEMICAL PROPERTIES OF MATTER
Signs that a chemical change has occured
COLOR CHANGE, ODOR CHANGE, HEAT RELEASE, GAS, PRECIPITATE
Example of a compound
NaCL (salt), H202 (Hydrogen Peroxide), or any compound
Pure Substances can be broken into what?
ELEMENTS or COMPOUNDS
Law of Conservation of Mass
MASS CANNOT BE CREATED or DESTROYED
What is the tendency of liquid to resist flowing?
VISCOSITY
Signs that a physical change has occured
SHAPE, COLOR, TEXTURE, DISSOLVING, PHASE CHANGES
Elements are found on the
PERIODIC TABLE
TRUE or FALSE: An example of an element is the ELEMENT of SURPRISE
FALSE
What is always the same after a chemical or physical change?
What is MASS?
What is the test to determine which is harder based on which one scratches the other?
HARDNESS
Burning wood and chopping wood are examples of
PHYSICAL AND CHEMICAL CHANGES
TRUE or FALSE: All compounds are molecules but not all molecules are compounds
TRUE
Concrete is a _____ mixture
A.) Homogeneous
B.) Heterogeneous
C.) Colloid
D.) Suspension
B.) Heterogeneous
Name all the Phase Changes where energy is taken away
DEPOSITION, CONDENSATION, FREEZING
Would flammability fall under "Chemical Properties of Matter", or "Physical Properties of Matter"?
CHEMICAL PROPERTIES OF MATTER
What reactants have greater energy than products
EXOTHERMIC
Elements are represented with what?
CHEMICAL SYMBOL
3 examples of a colloid
PLASTER, MAYO, WHIPPED CREAM, JELLY, SMOKE, PAINT