Category 1
There are 118 different elements known to science today. How many of these are naturally occurring on Earth?
98
what chemical compound can exist in all three states of matter depending on its temperature?
Water
An example of chemical change is___________?
The oxidation of haircolor products
__________ refers to the loss of oxygen and the addition of hydrogen.
Reduction
What term applies to all living things and those that were one alive?
Organic
_______ Is the most common element found in the known universe?
Hydrogen
Rusting iron and burning wood are examples of a change in what type of properties?
Chemical
What is an example of a pure substance?
Aluminum Foil
When oxygen is combined with a substance, the substance is ________?
Oxidized
Gasoline, synthetic fabrics, plastics and pesticides are all considered organic because they are manufactured from__________?
Natural gas and oil
A _______ is a stable, uniform mixture of two or more mixable substances that is made by dissolving a solid, liquid, or gaseous substance in another substance.
Solution
An example of physical change is __________?
Ice melting to water
In hair lightening processes, what substance oxidizes the melanin pigments in the hair, leaving the hair a lighter color?
Hydrogen peroxide
When using a permanent wave neutralizer,________.
Hair is oxidized by removing hydrogen
________, also known as alkalis, are compounds of hydrogen, a metal, and oxygen.
Bases
The pH scale measures the concentration of hydrogen ions in acidic and alkaline __________ solutions.
Water-based
Acidic solution tend to _______ the hair.
harden
What common cationic ingredient is used in dandruff shampoos?
Quaternary ammonium compounds
What type of chemical reaction requires the absorption of energy or heat from an external source for the reaction to actually occur?
Endothermic
What type of shampoos are mild formulations designed to prevent the stripping of haircolor from the hair?
pH-balancing
Acid-balance shampoos and normalizing lotions associated with hydroxide hair relaxers work to create what type of reaction?
Acid-alkali neutralization
What is a chemical compound that attracts and retains moisture from the atmosphere?
Humectants
Concentrated protein conditioners are used to _______.
Increase the tensile strength of the hair
Styling aids typically consist of polymers and resin formulations that are designed to give the hair body and texture. An example is__________.
Mousses
Oxidation and reduction always occur simultaneously and are referred to as a ________ reaction
Redox