Answer to Question 1
In content validity, you essentially check the operationalization against the relevant content domain for the construct. The content domain is like a comprehensive checklist of the traits of your construct. This approach assumes that you have a good, detailed description of the content domain, something that's not always true. Let's look at an example where it is true. You might lay out all of the characteristics of a teenage pregnancy-prevention program. You would probably include in this domain specification the definition of the target group, a description of whether the program is preventive in nature (as opposed to treatment-oriented), and the content that should be included, such as basic information on pregnancy, the use of abstinence, birth control methods, and so on. Then, armed with these characteristics, you create a type of checklist to be used when examining your program. Only programs that have these characteristics can legitimately be defined as teenage pregnancy-prevention programs. This all sounds fairly straightforward, and for many operationalizations, it may be. However, for other, more abstract constructs (such as self-esteem or intelligence), it may not be as easy to decide which characteristics constitute the content domain.
Answer to Question 2
A
Nitrogen content of live and dead leaves
Summary of SOAP Note Content
Summary of SOAP Note Content Cont.
Food Labels Provide Nutrient Content Information
Gene content of mitochondrial genomes
Overall Physics content topics for highschool