I. LOCATION, ARCHITECT/DESIGNER AND DATE OF CONSTRUCTION
D. Built by Sears, Roebuck and Co.
A. Exterior made of aluminum and glass.
B. Also big steel beams used.
B. 3.5 million square feet office space
A.used for tourism
B. also an office building
A. On the 103rd floor there is an observatory called the Skydeck that is open to the public.
B. On a clear day, visitors can see four states Illinois, Indiana, Michigan, and Wisconsin.
C. The Skydeck elevator can travel to the 103rd floor in 70 seconds!
D. It uses as much electricity as a town with 35,000 people.
Tim O'Toole I used World Book, and Internet.