PH scale
On the pH scale, numbers less than 7 indicate a(n):
acidic solution
Water freezing and becoming ice is an example of what type of change?
Physical
A mixture of two or more kinds of molecules, evenly dispersed, would be a(n):
solution
Electrons have which type of electrical charge?
negative
Which of the following statements describes how human hair is formed?
bonding of protein chains to other protein chains
pH balanced refers to a product that ranges from a pH of
4.5 to 5.5
the following is the most abundant element in the earth's crust and the second most abundant element in the earth's atmosphere
oxygen
the following term means liquids not able to be mixed
immiscible
When two hydrogen atoms combine with one oxygen atom, the result is a water molecule, which is a(n):
compound
The ability of hair to absorb moisture, liquids or chemicals refers to the hair's:
porosity
What color does red litmus paper turn when placed in an alkali?
Blue
Basic substances that cannot be broken down into simpler substances are called:
elements
a compound made up of two or more chemical components that are not chemically linked
a mixture
Amino acids that create proteins are linked together end to end by:
peptide bonds
Hair consists of 97%
keratin
Alkalis tend to taste:
Bitter
The scientific study of matter and the physical and chemical changes of matter is known as
Chemistry
The oil-loving part of a surface active agent is called:
lipophilic
Carbon, nitrogen, oxygen and hydrogen form the basis of:
amino acids
All matter that is now living or was alive at one time, with carbon present, falls within the scientific division of:
organic chemistry
When a solution has an equal number of hydrogen and hydroxide ions, the solution is considered:
neutral
This boy band got their start on X factor in 2010.
One Direction
Mixtures of two or more kinds of molecules, having a tendency to separate when left standing, are known as:
suspensions
What is created when amino acids join together in chains?
proteins
Hair comprises two solids which are carbon and sulfur and three gases which are hydrogen, nitrogen and:
oxygen