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SENIOR T11 W2
PH & MATTER 102C.11- 102C.12
| Question | Answer |
|---|---|
| The most accurate method of measuring pH is with: | a pH meter |
| All matter that is now living or was alive at one time, with carbon present, falls within the scientific division of: | organic chemistry |
| Hair consists of two solids which are carbon and sulfur and three gases which are hydrogen, nitrogen and: | oxygen |
| The following statements regarding pH are true: | 7 indicates a neutral substance values below 7 indicate more acidity pH is a unit of measurement that indicates whether a substance is acidic, neutral or alkaline |
| The chemical symbol for carbon is: | c |
| Which of the following conditions is an example of chemical change? | oxygen and hydrogen combining to form water |
| Putting a sodium hydroxide relaxer under a hair dryer: | could break the critical peptide bonds and destroy the protein structure |
| Which bonds found in the hair can be easily broken by heat or water? | hydrogen bonds |
| Two or more of the same atoms joined together by a chemical bond is a(n): | molecule |
| When a solution has an equal number of hydrogen and hydroxide ions, the solution is considered: | neutral |
| The simplest atomic structure is: | hydrogen |
| Acids tend to taste: | sour |
| Amino acids that create proteins are linked together end to end by: | peptide bonds |
| Distilled water with a pH of 7 is considered: | neutral |
| A solution that has more positive hydrogen ions than negative hydroxide ions is: | acidic |
| Atoms that are different form a(n): | compound |
| Matter with definite weight and volume but no definite shape is called: | a liquid |
| Electrons have which type of electrical charge? | negative |
| Protons have which type of electrical charge? | positive |
| Water molecules have two hydrogen atoms and one: | oxygen atom |
| Matter with definite weight, volume and shape is known as: | a solid |
| When amino acids combine to form the protein of the hair: | they form a new amino acid group |
| All matter that is not alive, has never been alive and does not contain carbon, such as rocks, water and minerals falls within the study of: | inorganic chemistry |
| Neutrons have which type of electrical charge? | none |
| What makes up the primary composition of hair? | keratin |
| The atomic number of a particular element indicates: | the number of protons in a single atom |
| What color does blue litmus paper turn when placed in an acid? | red |
| Atoms have three main parts: protons, neutrons and: | electrons |
| When two hydrogen atoms combine with one oxygen atom, the result is water, which is called a(n): | compound |
| The bonds found within hair that help organize protein chains in order to build hair are called: | side bonds |
| Atoms that are the same form a(n): | element |
| Which of the following is the most abundant element in the earth's crust and the second most abundant element in the earth's atmosphere? | oxygen |
| What is created when amino acids join together in chains? | proteins |
| Carbon, nitrogen, oxygen and hydrogen form the basis of: | they form a new amino acid group |
| What is the pH range of hair, skin and nails? | 4.5 to 5.5 |
| Substances of acidic or alkaline nature dissolve in water and/or contain: | water |
| On the pH scale, numbers greater than 7 indicate a(n): | alkaline solution |
| Which bond is the backbone of all protein molecules? | peptide |
| What color does red litmus paper turn when placed in an alkali? | blue |
| What is the side bond that is of the greatest concern to the salon professional? | disulfide bond |
| Which of the following statements describes how human hair is formed? | bonding of protein chains to other protein chains |
| On the pH scale, numbers less than 7 indicate a(n): | acidic solution |
| Which of the following items has/have definite weight and volume but no definite shape? | conditioners, solutions and shampoos |
| Which of the following are examples of a physical change? | performing a haircut shattering a piece of glass performing a thermal style |
| pH balanced refers to a product that ranges from a pH of: | 4.5 to 5.5 |
| The scientific study of matter and the physical and chemical changes of matter is known as: | chemistry |
| Basic substances that cannot be broken down into simpler substances are called: | elements |
| Alkalis tend to taste: | bitter |
| A pH of 5 is how many more times acidic than a pH of 6? | 10 |
Created by:
sroessler