Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

D) Models are an approximation of a real system that omits all but most essential variables in a system.

Explanation: Since models try to represent a reality in nature, they have to try to include the most relevant variables, otherwise, they will be hard to manipulate and they couldn't explain any system in nature.

4.  

5. D

6. C

7. D

8. B

12. C or D

Sorry I couldn't answer them all, I'll try to later.

e) One's own work.

Explanation:

Source inspection is the examining or checking that is used for inspecting quality of goods and quality control process. This process is carried through source inspector for surveillance of product or goods own working and function.

Other options are incorrect because source inspection does not investigates design specification, delivered goods, supplier plant products and products at production department.Thus, the correct option is option(e).

A.this description needs a unit describing the system of measurement          

Explanation:

A unit is required to understand the physical quantity being measured. 72 degrees creates a confusion about the reference scale. It could be degree Celsius or degree Fahrenheit.

It is known that 0°C to 32°F. So, the reference changes and hence, it is important to describe the unit. Option A is correct.

b. does not change real variables. Most economists think this is a good description of the economy in the long run but not in the short run

Explanation:

According to money neutrality, change in the money supply does not change real variables since most economists think this is a good description of the economy in the long run but not the short run.

Before answering the questions, it is important to know that a prepositional phrase (which is the type of phrase given in the first questions) may work as an adjective or an adverb. It works as an adjective when it modifies a noun and may answer the questions "Which one?", and it works as an adverb when it modifies an action (adverb), an adjective or another adverb, it often answers questions such as "How?" "When?" or "Where?" "In what circumstances?".

4. B. Water.

The phrase "In the pool" gives the reader more information about what "blue water" we are talking about (It is not the water in the glass, nor the water in the tub, but the water in the pool, therefore the noun "water" is the one it modifies. It modifies a noun, therefore the phrase acts an adjective.

5. B. jumped

"Into the pool" modifies the action or the verb "jump". The phrase answers the question of "Where did the diver jump?" Therefore, It is an adverbial phrase.

6.   B. few

"Of the townspeople" gives more information of what "few" the sentence is referring to. It is an adjective phrase as it modifies a noun, in this case, the noun is also the subject.

7. B. Cautious

"About websites" provides details of what thing we need to be cautious about. And it is an adverbial phrase because it modifies "cautious" (adjective).

8.  A. Immediately

This phrase is an adverbial one. It responds to the question "Immediately when, of what situation?"

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12.   D.  None of the above

This phrase is an adverbial phrase as it works as an adverb: it provides information of when the action should or should not take place. When should you not talk about the research you are doing? During the piano recital.

13. B. Adverb phrase

Again, this phrase answers the question "How her hair curled in precise waves?" Around her face. It modifies the verb "Curled" as it gives more information about how the action was done.

14. C. adjective phrase

Adjective phrases modify nouns. In the sentence, "in the long line" modifies the noun "people" as it provides information about what people the speaker is talking about.

16. C. in the cabinet.

The phrase itself does not have an error, but the way it is placed in the sentence. A more effective sentence is: Please stack the dishes, from largest to smallest, in the cabinet of the kitchen.

18.   C.In my bedroom, I play a computer role-playing game on line.

This sentence is the one that can be more easily read without being verbose, repetitive or confusing.

19.  A.  My father wrote a letter to the city manager, a complaint about the changes to the city pool hours.

This is the best written, and it also uses the appositive phrase correctly "a complaint about the changes to the city pool hours." which gives more specific details of what letter "my father wrote".

D is the answer for your problem

the goods at the production facility before they reach the customer.

Explanation:

A source inspection is the quality inspection in which the buyers need the quality check before the material is received and come sunder the total quality management.

Assuming the underlined phrase is during the flight, it would be a misplaced phrase.
Appositive and adjective phrases both act as adjectives in that they modify a noun or a group of nouns, describing them in more detail. This phrase, during the flight, describes the action - watching a documentary, and thus would be more of an adverb phrase rather than any of those two. Since adverb phrase/participial phrase is not an option, misplaced phrase should be correct. It means that the phrase is located in the wrong place in the sentence - the way this sentence is written, it would seem that the penguin migration is taking place during the flight. The correct sentence would be: During the flight, Michael watched a documentary about penguin migration. 

D would be the best answer