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Worksheet Grade 7 English Language Arts

Sedgewick Mill's Booster Pump: An Explanatory Paragraph Worksheet

A grade 7 worksheet where students order six scrambled sentences about a hilltop booster pump station into a well-organized explanatory paragraph.

Objectives

  1. Students will identify the topic sentence and concluding sentence of an explanatory paragraph.
  2. Students will arrange sentences in a logical order to explain a multi-step process.
  3. Students will select transition words that match the logical relationship between ideas.

Vocabulary

Impeller
An impeller is the spinning, blade-covered wheel inside a pump that pushes water outward and gives it energy to move through the pipes. It is the main working part of a centrifugal pump.

Also: booster pump, pressure, transition

Teacher overview

Sedgewick Mill is a fictional town where a hilltop neighborhood called Ridge View needs help from a booster pump to get water at a usable pressure. This worksheet gives students six sentences about how that pump station works, scrambled out of order, and asks them to reconstruct a well-organized explanatory paragraph. A common misconception this worksheet addresses directly: students often assume any true sentence can go anywhere in a paragraph, when in fact informative writing depends on a logical sequence a reader can follow.

Sedgewick Mill's Booster Pump: An Explanatory Paragraph Worksheet — Grade 7 English Language Arts
Name: ____________________________ Date: ______________

Student Worksheet

Read the six sentences below. They are all true, but they are not in a logical order.

A. Next, an electric motor spins an impeller inside the pump, which increases the water's pressure.

B. A pump operator monitors the station's gauges and controls to make sure the pressure stays within a safe range.

C. Booster pumps at Sedgewick Mill push water from the lower main line up to the hilltop neighborhood called Ridge View.

D. First, the pump station draws water from the main line running along Elm Avenue.

E. Because gravity alone cannot carry water uphill with enough pressure, the town relies on mechanical pumps instead.

F. The pressurized water then travels through an uphill pipe to homes in Ridge View.

  1. Which sentence should be the topic sentence that introduces the whole paragraph? Write its letter and explain your reasoning.
  2. Put all six sentences in the most logical order to form a well-organized explanatory paragraph. Write the order using letters, for example: C, E, D...
  3. Sentence D begins with the transition word "First." Name one other sentence that would make sense right after a transition like "Next" or "Then," and explain why.
  4. The sentence you placed fourth in your paragraph already opens with its own transition word. Which of these three words could also introduce that sentence without changing its meaning: however / for example / after that? Explain your choice.
  5. Which sentence functions as the paragraph's concluding sentence? What makes it a good ending rather than a good beginning?
  6. Rewrite sentence E, replacing "the town relies on" with a different but accurate phrase that keeps the same meaning.
  7. A classmate placed sentence B first in the paragraph. Explain why that placement would confuse a reader.
  8. Apply it: using the topic sentence you identified in question 1, write one new sentence that could be added to the paragraph to explain what happens to water pressure if the pump station loses electricity.
  9. In one or two sentences, explain why organizing ideas in a logical order matters when writing to inform readers about a process like this one.

From Water for Schools (waterforschools.org). This material is in the public domain (CC0) and may be copied, edited, and shared freely.

Answer Key
  1. Answer: Sentence C. It introduces the general topic, booster pumps moving water uphill to Ridge View, before the paragraph explains why and how, which is what a topic sentence should do.
  2. Answer: C, E, D, A, F, B. This order introduces the system (C), explains why pumps are needed (E), walks through the process in sequence (D, A, F), and ends with the operator's ongoing role (B).
  3. Answer: Sentence A or F could reasonably follow a "Next" or "Then" transition, since both describe a step in the process rather than the introduction or the conclusion. Either answer is acceptable with a valid explanation.
  4. Answer: "After that" fits best, because the fourth sentence in the ordered paragraph (A) describes a step that happens after the pump draws in water, not a contrast ("however") or an example ("for example").
  5. Answer: Sentence B. It describes an ongoing responsibility, monitoring the station, rather than a step in the water's path, which makes it a natural closing idea rather than an opening one.
  6. Answer: Wording will vary; an accurate rewrite keeps the meaning that mechanical pumps are necessary because gravity cannot move water uphill with enough pressure, such as "the town depends on mechanical pumps instead."
  7. Answer: Placing sentence B first would confuse a reader because it describes an operator monitoring the station before the paragraph has explained what the station does or why it exists.
  8. Answer: Wording will vary; a reasonable new sentence explains that without electricity, the motor cannot spin the impeller, so water pressure to Ridge View would drop.
  9. Answer: Logical order lets a reader understand each stage of a process, such as a cause before its effect, instead of encountering the ending or the operator's role before the process has been explained.

Differentiation

Support (below grade level)

Provide the six sentences already cut into strips so students can physically arrange them before writing the letter order on the page, and allow students to complete items 1 through 5 in a small group before working independently on items 6 through 9.

Extension (above grade level)

Ask students to add a seventh sentence of their own that fits logically between two existing sentences, then explain in writing exactly where it belongs and why moving it elsewhere would weaken the paragraph's organization.

ELL supports

Pre-teach "booster pump," "impeller," "pressure," and "transition" with a simple diagram showing water moving from Elm Avenue, through the pump station, to Ridge View. Allow students to answer items 3, 4, and 7 orally before writing a short response.