11 grade - Interactive lesson

1. They consisted of a flat __________, made from stone or wood...

The 3._________ cast by the stick in the light of the sun could tell observers what part of the day it was.

Obelisks, like sundials, used the shadow created by the sun to 4._________ the day into parts, but in this case the stick was a monument.

The 5.__________ dates back to ancient Egypt, but has not been forgotten.

The shadow 6._________ by the Washington Monument in Washington, D.C., USA can be used to tell the time.