Identify prepositions and prepositional phrases.

The geographic center of the United States is in Kansas.

Preposition is of/ prepositional phrase is in Kansas.

Standard time was adopted in the United States in 1884.

prepositions are in and in.

You have the prepositions right. Not all the prep phrases, though.

To identify prepositions and prepositional phrases in sentences, you can follow these steps:

1. Identify prepositions: Prepositions are words that show a relationship between a noun or pronoun and another word in the sentence. Common examples of prepositions include "in," "on," "under," "between," and "at."

2. Identify prepositional phrases: A prepositional phrase consists of a preposition followed by its object and any modifiers. To identify a prepositional phrase, look for the preposition and the noun or pronoun that follows it.

Now, let's analyze the sentences you provided:

1. "The geographic center of the United States is in Kansas."
- Preposition: "in"
- Prepositional phrase: "in Kansas"

2. "Standard time was adopted in the United States in 1884."
- Prepositions: "in" (used twice)
- Prepositional phrases: "in the United States" and "in 1884"

By following these steps, you can identify prepositions and prepositional phrases in sentences.