Question

directions: read this excerpt from a non - fiction text. then, answer the questions. advances in communications marconis wireless in the late nineteenth century, scientists began to understand how electricity and magnetism worked together in invisible waves in the air. they called these electromagnetic waves. italian scientist guglielmo marconi built a device that used electric signals to transmit one type of these electromagnetic waves, called radio waves, to a receiver at a distance. his device revolutionized modern communications. before, people communicating over a distance sent messages by telegraph, a system requiring wires and poles. marconis invention, called wireless telegraphy, meant that no wires and poles were needed. people could even send messages to ships at sea. radio by the 1920s, improvements to marconis wireless made it possible to control, or modulate, the radio waves so that words and music could be transmitted, or broadcast. in the u.s., the device and its broadcasts came to be called the radio. 1. what do the title and subheads in this excerpt show that the text is about? 2. besides the title and subheads, what is another text feature in the excerpt, and what is the authors purpose in using it? 3. what are three examples of the text feature you identified in question 2? 4. what sort of diction does the author use in the excerpt? a. informal and conversational b. technical and descriptive c. old - fashioned and flowery 5. what are three words or phrases from the excerpt that illustrate the type of diction you identified in question 4? 6. what type of sentences does the syntax in the excerpt mostly use? 7. based on your answers to questions 1 - 6, what is the authors purpose in writing?

Explanation:

1. The title "Advances in Communications" and sub - heads like "Marconi's Wireless" and "Radio" indicate the text is about the development of communication technologies.
2. Another text feature is the use of technical terms. The author's purpose is to accurately convey information about communication technologies.
3. Technical terms such as "electromagnetism", "electromagnetic waves", "wireless telegraphy".
4. The author uses technical and descriptive diction as they are explaining scientific and communication - related concepts precisely.
5. "Electromagnetism", "modulate", "wireless telegraphy".
6. The text mostly uses declarative sentences to present facts about communication advancements.
7. The author's purpose is to inform readers about the historical development and key concepts in communication technologies.

Answer:

1. The development of communication technologies.
2. Technical terms; to accurately convey information.
3. "Electromagnetism", "electromagnetic waves", "wireless telegraphy"
4. b. technical and descriptive
5. "Electromagnetism", "modulate", "wireless telegraphy"
6. Declarative sentences
7. To inform about the historical development of communication technologies.