Bumps and Tubes: teacher key

How Plastic Toy Bricks Are Made, grade 1 edition, written for 1st grade. Tiny plastic grains become toy bricks. A machine melts them, squeezes them in a mold, and the bricks drop out.

Read the book. Print this page for the key.

Questions and answers

1. What do bricks start as?
   • Tiny grains (answer)
   • Big stones
   • Paper bits
2. Where do the grains wait?
   • In socks
   • In big tanks (answer)
   • In pans
3. What shape is the mold?
   • Like a ball
   • Like a shoe
   • Like the brick (answer)
4. Where do the new bricks drop?
   • On a belt (answer)
   • In a lake
   • On a bed
5. Why can old bricks fit new bricks?
   • They are glued
   • The design is the same (answer)
   • They are magic