PH scale
Matter
Mixture
Atoms
Hair in chemistry
100

On the pH scale, numbers less than 7 indicate a(n):

acidic solution


100

Water freezing and becoming ice is an example of what type of change?

Physical 

100

A mixture of two or more kinds of molecules, evenly dispersed, would be a(n):

solution


100

Electrons have which type of electrical charge?

negative

100

Which of the following statements describes how human hair is formed?

bonding of protein chains to other protein chains

200

pH balanced refers to a product that ranges from a pH of

4.5 to 5.5

200

 the following is the most abundant element in the earth's crust and the second most abundant element in the earth's atmosphere

oxygen

200

the following term means liquids not able to be mixed

immiscible

200

When two hydrogen atoms combine with one oxygen atom, the result is a water molecule, which is a(n):

compound

200

The ability of hair to absorb moisture, liquids or chemicals refers to the hair's:

porosity

300

What color does red litmus paper turn when placed in an alkali?

Blue

300

Basic substances that cannot be broken down into simpler substances are called:

elements

300

 a compound made up of two or more chemical components that are not chemically linked

a mixture

300

Amino acids that create proteins are linked together end to end by:

peptide bonds

300

Hair consists of 97%

keratin


400

Alkalis tend to taste:

Bitter

400

The scientific study of matter and the physical and chemical changes of matter is known as

Chemistry 

400

The oil-loving part of a surface active agent is called:

lipophilic

400

Carbon, nitrogen, oxygen and hydrogen form the basis of:

amino acids

400

All matter that is now living or was alive at one time, with carbon present, falls within the scientific division of:

organic chemistry

500

When a solution has an equal number of hydrogen and hydroxide ions, the solution is considered:

neutral

500

This boy band got their start on X factor in 2010.

One Direction

500

Mixtures of two or more kinds of molecules, having a tendency to separate when left standing, are known as:

suspensions

500

What is created when amino acids join together in chains?

proteins

500

Hair comprises two solids which are carbon and sulfur and three gases which are hydrogen, nitrogen and:

oxygen