CKLA_Grade 4_Unit 4_Eureka! (Inventors)

stylus

A pointed tool for writing or drawing or engraving

wedge

An object with at least one slanting side ending in a sharp edge, which cuts material apart.

George Washington Carver

Black scientist who improved farming methods

Ruth Wakefield

Invented the Chocolate chip cookies

Antonie van Leeuwenhoek

Invented the microscope

Alexander Graham Bell

Invented the telephone

wheel and axle

Two different sized circular objects that are attached together and turn as one.

petri dish

a shallow dish used to culture bacteria

screw

a threaded inclined plane

Wright Brothers

credited with the first flight

Alexander Fleming

discovered penicillin

Louis Braille

invented a printing system for the blind that consists of dots

Hedy Lamarr

invented frequency hopping

ancient egyptians

invented inclined plane

Cai Lun

invented paper

Jacques Cousteau

invented the Aqua-Lung

Thomas Edison

invented the light bulb and phonograph

Guglielmo Marconi

invented the radio

Su Song

invented the water powered clock

pulley system

invention used to lift heavy things

Bette Nesmith Graham

inventor of liquid paper

Archimedes

mathematician figured out how levers work