Combination

Plastic

Means 'easily shaped' and is derived from non-renewable resources such as crude oil.

Types of Plastic

Divided into Thermoplastic (recyclable, can be reformed after heating) and Thermosetting (mostly non-recyclable, cannot be reformed).

Recycling of Plastic

Vital due to pollution caused by plastic, involves processing used plastic into new products.

3R's of Recycling

Reduce, Reuse, Recycle.

Reduce

Limit plastic use by opting for alternatives like reusable bags.

Reuse

Encourage the use of reusable containers and bags.

Recycle

Involves sorting used plastic by type (using identification codes) for processing.

Steps for Recycling

Include Collecting, Sorting, Shredding, Cleaning, Melting, and Manufacture of Grains.

SPST Switch

control device. opens or closes a circuit

Puch switch

control device. temporary closes a circuit

single pole double throw

control device. diverts the current down either one or two possible paths

voltmeter

must always be conected in parallel

ammeter

must always be connected in series

diode

a control device that allows current to flow in only one direction

LED

a control device that allows current to flow in only one direction and emits light at the same time

LDR

a sensor: light dependant resistor

thermistor

a sensor that detects change in temperature

transistor

control device: amplifies or multiplies current or can act like a switch

capacitor

control device that can store and release energy