it is a cord that brings electric power to the motor
it is a bar that connects moving parts
Which of these is a San Francisco landmark?
a person who lives in San Francisco
the Golden Gate Bridge
a park bench in San Francisco
a sidewalk in San Francisco
How might someone convey good wishes?
by sending a greeting card
by taking a walk in the sunshine
by feeling joyful
by listening to music
A coal shaft is a
a person who works in a coal mine
container that carries coal up from underground
tunnel that goes straight down into a coal mine
tool for digging coal
Which of these are cooking methods?
frying, baking, and boiling
eggs, bacon, and toast
pots, pans, and dishes
knives, forks and spoons
Which of these usually has a rod to hold it up?
a tree
a table
a curtain
a door
Which of these has a shaft?
an apple
an arrow
a table
a bed
The subway and the elevator are two inventions that changed cities forever. Both_________________people quickly and safely to where they want to go.
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
Elisha Otis built the first elevator in 1857. His invention made the skyscraper possible and is a____________________in human history.
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
The world's tallest building, completed in 2010, is the 2,717-foot Burj Khalifa, in the United Arab Emirates. For hundreds of years, the record was held by the 528-foot____________________in Ulm, Germany
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
Before 1857, the only way to get to a building's upper stories was by climbing stairs. Otis'_________________________was less tiring and could carry people to any height.
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
The idea caught on, and soon skyscrapers were shooting up like mushrooms. Otis' elevator was the perfect______________________________for moving people up and down quickly and safely
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
Otis was working in a factory that made beds when he got his idea. He saw how a hanging cage used for moving______________between floors could be made accident-proof.
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
The idea behind Otis' invention is quite simple, If the_________________holding the elevator car breaks , then there should be some means of keeping it from dropping like a stone.
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
Before the skyscraper, tall buildings like the one at Ulm were made of stone, The use of steel girders made possible_________________________Like Burj Khalifa
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
It was unlikely that such a thing would happen. However, if it did, then steel___________________in the side of the elevator car would spring out to hold it in place.
cathedral
device
rods
convey
structures
freight
shaft
landmark
method
cable
There were two rods, and they caught in slots designed to hold them and prevent further movement. The slots ran the whole length of the elevator_________________