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Following a Technical Explanation is a free printable Grade 3 English worksheet on holding a chain of causes together while reading, aligned to Common Core standard RI.3.10. It prints 2 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Following a Technical Explanation

RI.3.10

NameDate

Read the text, then answer the questions.

1.Read the text, then answer the questions.

Morse Code

Morse code turns every letter into a pattern of short and long signals: dots and dashes. The commonest letters were given the shortest patterns. E is one dot. T is one dash. Q, which is rare, is dash-dash-dot-dash. Because of that choice, an average message is much shorter than it would be otherwise. A message can be sent as sound, as light, or as taps on a pipe. That is why it survived so long: it needs almost no equipment. Timing carries the meaning. A dash is three times as long as a dot. The gap between letters is three dots long, and between words, seven. SOS was chosen because it is easy to recognise: three dots, three dashes, three dots.

  1. 1. Explain the cause and effect between letter frequency and message length.
  2. 2. In a message, which gap is longer: between letters or between words?
  3. 3. Why does timing matter more in Morse than in braille?
2.Read the text, then answer the questions.

How a Windmill Grinds Flour

A windmill turns moving air into turning stone. The sails are set at a slight angle. Because of that angle, wind pushing on them cannot pass straight through, so it pushes them round instead. The sails turn a horizontal shaft. A large wooden gear on that shaft meshes with a smaller one on an upright shaft, which turns the millstones below. Because the smaller gear has fewer teeth, it spins faster than the sails do. Four turns of the sails can mean twenty turns of the stone. The grain falls between two stones. The top stone turns; the bottom one does not. The grain is crushed between them, and flour comes out at the edge.

  1. 1. Put these in order: the millstones turn, the sails turn, the gears mesh.
  2. 2. Explain the cause and effect between the small gear and the speed of the stone.
  3. 3. What would happen if the sails were flat rather than angled?

LessonPrint · RI.3.10 · Set 8 · free to copy for classroom use

Answer key — Following a Technical Explanation

Set 8. Prints on its own sheet.

  1. 1.1. Because common letters got short patterns, an average message came out much shorter. 2. Between words — seven dots long, against three between letters. 3. Because Morse is sent through time as signals, so the length of a gap is part of the meaning.
  2. 2.1. The sails turn, the gears mesh, the millstones turn. 2. Because the smaller gear has fewer teeth, it spins faster, so the stone turns faster than the sails. 3. The wind would pass straight through and they would not turn.

Last reviewed 2026-09-05. Aligned to RI.3.10 of the Common Core State Standards for English language arts.