What are the Paleolithic and Neolithic periods?

The Paleolithic era is a period from around 3 million to around 12,000 years ago. The Neolithic era is a period from about 12,000 to around 2,000 years ago. Basically, the Paleolithic era is when humans first invented stone tools, and the Neolithic era is when humans started farming.

How is the Stone Age classified?

Divided into three periods: Paleolithic (or Old Stone Age), Mesolithic (or Middle Stone Age), and Neolithic (or New Stone Age), this era is marked by the use of tools by our early human ancestors (who evolved around 300,000 B.C.) and the eventual transformation from a culture of hunting and gathering to farming and …

Why is the Paleolithic period known as the Stone Age?

Paleolithic Period, also spelled Palaeolithic Period, also called Old Stone Age, ancient cultural stage, or level, of human development, characterized by the use of rudimentary chipped stone tools. (See also Stone Age.)

How did Man make fire?

The main sources of ignition before humans appeared were lightning strikes. Our evidence of fire in the fossil record (in deep time, as we often refer to the long geological stretch of time before humans) is based mainly on the occurrence of charcoal.

How did early humans see fire in the jungle?

Early humans lived in Jungles , when they saw fire: a. They used to get scared. Later they realized that fire gave light in the dark and also warmth.

How do we control fire?

The most common method to control a Class-A fire is to remove heat by spraying the burning solid fuels with water. Another control method would be to reduce the oxygen content in the immediate vicinity of the fire (i.e., “smother” the fire), such as by the introduction of an inert gas such as carbon dioxide.

What is commonly used to control fire?

Halogenated hydrocarbons, commonly called halons, take the form of liquefied gas or vaporizing liquids at room temperature; they inhibit the flame chain reaction. Steam is used to control fire in confined areas, while inert gas is employed to extinguish gas, dust, and vapour fires.

What are the three ways of controlling fire?

Fire can be extinguished in 3 ways:

By removing the fuel.
By removing the heat.
By cutting off the air supply to the burning substance.

What is the principle of fire extinguishing Class 8?

Fire extinguishing works on the principle of cutting off the supply of oxygen to the fire and bringing down the temperature.

What are the 4 types of fire?

Classes of fire

Class A – fires involving solid materials such as wood, paper or textiles.
Class B – fires involving flammable liquids such as petrol, diesel or oils.
Class C – fires involving gases.
Class D – fires involving metals.
Class E – fires involving live electrical apparatus. (

What is an explosion Class 8?

Explosion – When a sudden reaction takes place with the release of heat and light and evolution of a large amount of gas takes place it is called an explosion.

What are the 4 main principles of fire safety?

Basic principles

Prevent the occurrence of fire:
Provide fire compartmentalization:
Provide safe escape routes:
Provide fire alarms:
Provide extinguishing agents:
Provide facilities for the fire brigade:
Provide adequate control and maintenance:

What is the basic principle of fire prevention?

A fire needs three elements – heat, oxygen and fuel. Without heat, oxygen and fuel a fire will not start or spread. A key strategy to prevent fire is to remove one or more of heat, oxygen or fuel.

What are the four basic principles for discovery of fire and smoke?

Oxygen, heat, and fuel are frequently referred to as the “fire triangle.” Add in the fourth element, the chemical reaction, and you actually have a fire “tetrahedron.” The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.

What is the best Defence against fire?

Your best defense against fire damage is to ensure that staff knows what to do in the event of a fire so they can respond quickly. All employees must know: Where exits and fire alarm pull stations are located. Evacuation routes.

What does ABC mean in fire extinguisher?

Dry Chemical Extinguishers

What is an example of a Class D fire?

Class D. The Class D fire is defined as one that uses a combustible metal as its fuel source. Examples of such combustible metals include titanium, magnesium, aluminum, and potassium. When confronted with such a fire, common extinguishing agents such as water are ineffective and can be hazardous.

Why is good housekeeping important in the prevention of fires?

Effective housekeeping can help control or eliminate workplace hazards. It includes keeping work areas neat and orderly, maintaining halls and floors free of slip and trip hazards, and removing of waste materials (e.g., paper, cardboard) and other fire hazards from work areas.

What are the 5 s of good housekeeping?

5S or good housekeeping involves the principle of waste elimination through workplace organization. 5S was derived from the Japanese words seiri, seiton, seiso, seiketsu, and shitsuke. In English, they can be roughly translated as sort, set in order, clean, standardize, and sustain.

What are the signs of poor housekeeping?

12 Signs of Poor Housekeeping

Clutter.
Poor organisation.
Untidiness.
Dust.
Dirty floors.
Dirty counter tops.
Mould around the bath.
Spills and leaks.

How can poor housekeeping be prevented?

Policies to consider:

Institute a routine cleaning schedule.
Hold everyone in the workplace accountable for housekeeping.
Keep walkways free of debris, cords, cables and storage items.
Clean up oil, water and grease on floors immediately.
Train all employees on the proper disposal of combustible and flammable materials.

What are the 7’s of good housekeeping?

7S of Good Housekeeping is the most basic and fundamental approach for productivity and quality improvement in all types of business. 7S of Good Housekeeping is an expanded version of 5S of Good Housekeeping. 7S stands for sort, systematize, sweep, standardize, safety, self-discipline and sustain.

What is importance of housekeeping?

A thoroughly cleaned, well-maintained environment promotes a feeling of safety, comfort, and enjoyment. In a clean living space, nobody worries that their family is being exposed to unsanitary conditions.

What is housekeeping checklist?

An office housekeeping checklist is used to inspect the overall office environment to lower worker exposure to hazards (i.e., slips, trips, falls, etc). Use this checklist to visually inspect the cleanliness and condition of the building, stairways, aisles, floors, and equipment.