Show:
vocabulary
vocabulary
100
movable type
What is individual characters made of wood or metal that can be arranged to create a job for printing and then used over again
100
porcelain
What is a hard, white pottery, also called china
200
immune system
What is the body's natural defense against disease
200
gun powder
What is an explosive powder made o saltpeter and other materials
300
inoculate
What is to protect against disease by transmitting a disease-causing agent to a person, stimulating the body's defensive reactions
300
vaccine
What is a substance used to immunize people against a disease
400
mass-produce
What is to make similar items in quantity by using standardized designs and dividing labor among workers
400
catapult
What is a slingshot-like war machine used for shooting rocks,shells, and other objects
500
segmental arch bridge
What is a bridge supported by arches that are shallow segments (parts) of a circle ^_^
500
alchemy
What is a combination of science, magic, and philosophy that was practiced in medieval times -_-