Page 19 - Curriculum Visions Dynamic Book

 A Space Shuttle on its crawler transporter after leaving the vehicle assembly building (VAB), shown in the distance. The slow crawling journey is 5 km and can take 72 hours.
 The solid fuel boosters in action.
cAtAlyst A substance that speeds up a chemical reaction but that is itself unchanged.
epoxy resin Adhesives that develop their strength as they react, or “cure,” after mixing.
pAyloAd The spacecraft that is carried into space by a launcher.
polymer A compound that is
made up of long chains formed by combining molecules called monomers as repeating units. (“Poly” means many, “mer” means part.)
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