1.PLASTIC MATERIALS: In general, plastic materials are a normal part of everyday life. They also play important roles in sectors such packaging, telecommunications, transport, construction, medicine, agriculture and information technology. Plastics consist of long chains of molecules, mostly made of the element “carbon”. These chains of macromolecules are called polymers, which is another name for plastics. Polymers are composed of smaller molecules called monomers. 1.1 THE ORIGIN OF PLASTICS:

True/False: During the early years of computing, the primary threats to security were physical theft of equipment, espionage against the products of the systems, and sabotage.

List the main adversaries of the US and describe the type of cyber attacks they are known for.

Russia – Misinformation campaigns

China – Espionage focused on exposing US tech.

Iran – DDoS attacks

North Korea – Attacks focused on generating money.

True/False Malware is a generic term for software that has a malicious purpose.

What is a circuit board?
A printed circuit board (PCB) mechanically supports and electrically connects electronic components using conductive tracks, pads, and other features etched from copper sheets laminated onto a non-conductive substrate. A printed circuit board has pre-designed copper tracks on a conducting sheet. The pre-defined tracks reduce the wiring, thereby reducing the faults arising due to loosen connections. One simply needs to place the components on the PCB and solder them.
What are

AndroidManifest.xml – describe your app in this file; your app starts with the “main” method you declare here. You also need to declare all of your activities here.

Activity – an Activity is a Java controller class that typically corresponds to one screen in your app

Fragment – a Fragment is a Java controller that typically corresponds to a widget in a screen (or possibly the full screen)

Intent – you launch new activities with Intents.

Service – background services, like notifications

R class –