CKLA Unit 4 Eureka! Flashcard

Front

Who invented frequency hopping, a concept that led to wireless devices and Wi-Fi?

Back

Hedy Lamar

Front

True or False: Electric lights existed before Thomas Edison's lightbulb.

Back

True

Front

What is a wedge?

Back

A simple machine that is used to separate two objects or portions of an object, or to hold an object in place.

Front

Who invented the chocolate chip cookie?

Back

Ruth Wakefield

Front

What is a lever?

Back

A simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.

Front

What is frequency hopping?

Back

A method of transmitting radio signals by rapidly switching the carrier frequency among many frequency channels.

Front

What is a pulley?

Back

A simple machine that consists of a wheel on an axle or shaft that is designed to support movement and change of direction of force.

Front

What is a screw?

Back

A simple machine that converts rotational motion into linear motion, often used to hold objects together.

Front

What is the purpose of a simple machine?

Back

To make work easier by allowing us to apply less force over a greater distance.

Front

What is the definition of an invention?

Back

A new device, method, or process developed from study and experimentation.