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

32. A substance such as an enzyme or alpha hydroxy acid that works in conjunction with other ingredients to remove dead skin cells is a :

Of the following systems, which is the physical foundation of the body?

Which of the following is the toughest layer of the epidermis?

40. Which ingredient listed below is compatible with both water and oil?

33. What is the number one cause of skin cancer and premature againg?

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

Of the following machines, which acts like a miniature vacuum cleaner to help in deep pore cleansing?

What are considered to be the basic units of life?

29. Which cosmetic product helps cleanse the skin further while properly balancing the pH?