Phase Changes
The melting os a substance is an example of...
Phase changes
Describes how a substance reacts when it changes...
Chemical properties
Release of Heat is an example of...
Exothermic
Substances that cannot be broken down any further
Elements
Classify Gold (Au)
Element
After a chemical or a physical change, mass is always...
the same.
Characteristics of a substance that can be observed without changing the substance.
physical change.
Name one sign that a chemical change has appeared...
Color change, odor change, release of gas.
_____ Reperestned with a chemical symbol (Au, B, H)
Elements
Classify Chocolate Chip Cookies
Heterogeneous
Energy cannot be created of destroyed is the...
Law on conservation of energy.
Heat of combustion is an example of...
Chemical properties
True of false, most chemical changes can be reversed.
False.
Ex: NaCl, C55M72O5N4Mg, O3
Compounds
Further Classify Chocolate Milk
Suspension
Sublimation and condensation is an example of...
phase changes
Viscosity, hardness, malleability is an example of...
physical properties
Formation of _____ - liquid turning solid of- cottage cheese
precipitate
Made of different elements/compunds
Molecules
2+ liquids that do not mix well into each other
Immisible
Condensation, Gas to liquid, energy must be...
Taken away
If the toy has a density of 3.6, the toy will...
sink
Name five examples of a homogeneous mixture (solution)
Air, sea water, steel, coffee, wine.
All compounds are _______, but not all __________ are compounds
Molecules
Mixture that is mixed well but some particles intermediate in size between the large and small particles
Colloids