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Book 3 science quiz: free printable worksheet

A free 12-question number quiz for kids, parents and teachers, based on A Million Whys Book 3, The Built Expedition. Every fact comes straight from a page in the book. Fill in each missing number from the number bank. The answer key links to the video for each question.

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Name: ______________________    Date: ______________    Score: ____ / 12

Fill in the missing number

Number bank: 3   10   12   16   90   100   120   340   1800   1854   1876   35,000

  1. Big jets cruise at about _______ feet, higher than any mountain.
    From: Why Do Airplanes Stay in the Sky?
  2. The first battery was Volta's pile, made in _______.
    From: Why Do Batteries Die?
  3. Sound moves only about _______ meters per second, so the boom catches up a little later.
    From: Why Do We See Lightning Before Thunder?
  4. Some skyscrapers sit on piles driven more than _______ feet down!
    From: Why Do Buildings Have Foundations?
  5. In _______, Elisha Otis showed a safety brake that stops the car if a cable snaps.
    From: Why Do Buildings Have Elevators?
  6. A slight tilt, just a quarter inch every _______ feet, is enough to make rain walk to the downspout.
    From: Why Do Roofs Have Gutters?
  7. Joists spaced about every _______ inches share the load of furniture and feet.
    From: Why Do Floors Have Beams?
  8. In _______, Alexander Graham Bell made the first telephone call. He said, Mr. Watson, come here.
    From: Why Do Phones Ring?
  9. Most grocery codes are UPC numbers, and they are _______ digits long.
    From: Why Do Barcodes Beep at the Store?
  10. A dash is _______ times longer than a dot.
    From: Why Did Morse Code Use Dots and Dashes?
  11. When two bubbles touch, they share a wall and meet at about _______ degrees.
    From: Why Do Bubbles Shimmer Then Pop?
  12. A square is a frozen right angle. It checks that two edges meet at _______ degrees.
    From: Why Do Carpenters Use Squares?
Show the answer key
  1. 35,000 (Big jets cruise at about 35,000 feet, higher than any mountain. Book 3, Question 2)
  2. 1800 (The first battery was Volta's pile, made in 1800. Book 3, Question 27)
  3. 340 (Sound moves only about 340 meters per second, so the boom catches up a little later. Book 3, Question 31)
  4. 100 (Some skyscrapers sit on piles driven more than 100 feet down! Book 3, Question 51)
  5. 1854 (In 1854, Elisha Otis showed a safety brake that stops the car if a cable snaps. Book 3, Question 60)
  6. 10 (A slight tilt, just a quarter inch every 10 feet, is enough to make rain walk to the downspout. Book 3, Question 64)
  7. 16 (Joists spaced about every 16 inches share the load of furniture and feet. Book 3, Question 71)
  8. 1876 (In 1876, Alexander Graham Bell made the first telephone call. He said, Mr. Watson, come here. Book 3, Question 76)
  9. 12 (Most grocery codes are UPC numbers, and they are 12 digits long. Book 3, Question 83)
  10. 3 (A dash is 3 times longer than a dot. Book 3, Question 92)
  11. 120 (When two bubbles touch, they share a wall and meet at about 120 degrees. Book 3, Question 115)
  12. 90 (A square is a frozen right angle. It checks that two edges meet at 90 degrees. Book 3, Question 142)

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