Skyscraper Secrets: teacher key

How Buildings Stand Up, grade 3 edition, written for 3rd grade. From steel frames to a giant swinging pendulum, see the ideas that let buildings reach high.

Read the book. Print this page for the key.

Questions and answers

1. What does the foundation do?
   • Holds the building up (answer)
   • Makes the wind
   • Rides up and down
2. Which way does the pendulum in Taipei 101 swing?
   • With the tower
   • Opposite the tower (answer)
   • It does not swing
3. When did people start to use the word skyscraper?
   • The 1880s (answer)
   • The year 100
   • The 1990s
4. What do builders put inside concrete?
   • Sand
   • Steel bars (answer)
   • Grass
5. Why did elevators help buildings get taller?
   • People could ride up high (answer)
   • They made the wind stop
   • They were made of steel

Words

• foundation: building's base
• pendulum: swinging weight
• skyscraper: very tall building
• concrete: hard gray stuff