Vocabulary
Define Homogeneous Mixture
Looks the same throughout mixture
Give 3 examples of Physical Property
food dye, crumbling paper, popping a balloon, breaking glass/ egg
If chemicals can be reversed, then what do they require?
a lot of energy
A pure substance is....
All pure substances are defined by....
one type of thing
chemical formulas
Define Safety Diamond
Hazard communication system to identify risks posed by hazardous materials
Define yield
to result in
Give 3 examples of Chemical Change
What are two types of physical properties?
Intensive and Extensive
Two types of Pure substance
Element & Compound
True or False: Physical Changes are not expected
FALSE
Define Heterogeneous Mixture
looks different; can tell the difference in all parts of the mixture
Give an example of Homogeneous Mixture:
Give an example of Heterogenous Mixture:
1. coffee, tea, lemonade
2. Trial Mix, ocean water, muddy water
What type of mixture is colloid?
Heterogeneous
A compound is formed from 2 or more of different elements that are chemically_____ together
bonded
Which level is the lowest number on a Safety Diamond? Which level is the highest number on a Safety Diamond?
0 and 4
define chemical changes/properties
changing the overall make-up of the object/material
True or False: Physical changes can be reversed
TRUE
What are the 5 signs of chemical change?
Light Production, Precipitate, Color Change, Temperature Change, Gas Formation
What does diatomic mean?
2 same atoms
True or False: Physical changes can be reversed
TRUE
define cohesion
attraction of molecules for other molecules of the SAME kind
True or False: Chemical changes are not expected
TRUE
What are the 4 categories to a safety diamond?
Health, Flammability, Instability, Special Hazard
Mixtures are physical mixtures of ____ or _____ pure substances
2, more
What are some prime examples of chemical change? List 4
Oxidation, reactivity, flammability, corrosive, heat combustion, etc.