Notes, summaries, assignments, exams, and problems for Secondary education

FIRST WORLD WAR (1914-1918)

It was fought by various European countries and their African and Asian colonies, the United States, Japan, China, and some Latin American republics.

Causes of the war

Control of the Balkans: The Austro-Hungarian Empire and Russian Empire competed for the control of the Balkans. Also, Serbia was angry about the expansion of the Austro-Hungarian Empire into the area. This led to a crisis. Control of some colonies: France wanted to recover the region of Alsace-Lorraine. France and Germany also competed for control of colonies, important for economic expansion, especially Morocco. Great Britain supremacy of its merchant navy threatened: When the German empire, which had become an economic power during the Second Industrial... Continue reading "Causes, Phases, and Consequences of the First World War" »

Understanding Digestion

What is Digestion?

Digestion is the process by which food is transformed into simpler substances (nutrients) so they can be used by our cells. It involves two main processes:

• Mechanical Process: Chewing and the muscular action of organs crush and mix foods with digestive juices.
• Chemical Process: Digestive enzymes in digestive juices cause chemical reactions that break food into simple substances.

Mechanical vs. Chemical Digestion

The digestive system employs both mechanical and chemical digestion:

• Mechanical: Mouth
• Chemical: Stomach, liver, small and large intestine

Swallowing: The Process

Swallowing allows substances to pass from the mouth to the pharynx. It involves three main stages:

1. The bolus is moved to the oral cavity as

A polygon is the portion of the plane bounded by a closed polyline. A polygon is a plane shape with straight sides. A plane is a flat surface with no thickness.
Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is “closed” (all the lines connect up).

1. Circumcenter

The circumcenter is the center of the triangle’s circumcircle, one that passes through the three vertices of the triangle.
It is located at the intersection of the three side bisectors. As we already know the line bisector is the locus of all the circle centers that pass through the endpoints of a segment. As the three sides of a triangle are segments, if we draw the three side bisectors, we will get a point that will be the center of a circle that... Continue reading "Understanding Triangle Centers: Circumcenter, Incenter, Centroid, and Orthocenter" »

Simple Present

Pres. Simp. -> She cleans her.. -> She has her brushes cleaned

Present Continuous

Past Simple

Past Continuous

Future Simple

Future Continuous

Present Perfect

Present Perfect Continuous

Past Perfect

Past Perfect Continuous

Fundamentals of Structures

What is a structure?

A structure is a group of elements united to support a load.

What is a force?

A force is anything that can deform a body or modify its state of rest or movement.

What is a load?

Loads are the forces that a structure must bear.

Types of structural loads

Loads are categorized as either fixed or variable.

What is an effort?

An effort is the internal force experienced by the elements of a structure when subjected to external forces.

Types of structural efforts

The primary efforts are: Tension, Compression, Shear, Torsion, and Bending.

Conditions for a stable structure

A structure must possess three key conditions: rigidity, stability, and resistance.

• Rigidity: Achieved through triangulation.
• Stability: Achieved by

The New Man: Humanist Vision

The new man: humanists proposed a new vision of man as the most perfect of God's creations. They considered him the center of universal interest. Freedom and reason: they believed that God had created man as a free being responsible for his actions and capable of rational thought. Scientific interest: in order to expand their knowledge, they used observation and experimentation. Human progress: humanist thought was optimistic. Intellectuals believed in God and the Christian faith. Rediscovery of antiquity: the teachings of classical authors such as Plato and Aristotle were a model for intellectual, social, and political behavior and education.

Demographic and Economic Recovery

In the second half of the 15th century,... Continue reading "The Renaissance: A New Vision of Man and Society" »

Causes of the Protestant Reformation

The 16th century witnessed significant religious conflicts, primarily driven by the Reformation and subsequent Counter-Reformation. Several factors contributed to the widespread desire for change within the Roman Catholic Church.

Disdain for the Papacy and Clergy

The Roman Catholic Church held immense power across Europe. However, many perceived that popes were primarily concerned with their own interests, bishops lived lives of luxury without fulfilling their pastoral duties, and many religious orders failed to adhere to their established rules. This led to a growing disillusionment among the populace.

Abuses Within the Church

Widespread abuses further fueled discontent. These included:

• Nepotism: High-ranking

The Modern Age

A New Historical Period

The Modern Age (15th-18th centuries) is generally considered to have begun with the capture of Constantinople by the Turks in 1453 or with the discovery of America in 1492, and it ended with the French Revolution in 1789.

The Modern Age is divided into several sub-periods:

* 16th century: Renaissance period * 17th century: Baroque period * 18th century: Enlightenment and Absolutism

Changes in the 15th and 16th Centuries

From the mid-15th century to the 16th century, the international landscape underwent significant changes due to these events:

* The disappearance of the Byzantine Empire: Following the capture of Constantinople by the Turks in 1453, Western Christianity felt increasingly under threat from... Continue reading "Modern Age: Transformations, Discoveries, and Key Events" »

Outlet: A store selling goods of a company, usually at a lower price.

Outcome: The result or effect of an action, situation, or event.

Outlook: The likely future situation.

Outing: A short journey made by a group of people.

Onset: A start; a beginning.

Outrage: A strong feeling of shock.

Outbreak: A sudden appearance of a disease.

Outlay: An amount spent at the beginning of a business.

Idioms and Expressions

Break the mould: To be new and different.

Blind someone with science: To confuse somebody by using difficult or technical words.

Move with the times: To change and become more modern because attitudes and fashion are changing.

Be someone's guinea pig: To be the subject of an experiment.

Turn the clock back: To want to return to a past situation because... Continue reading "Essential Vocabulary: Definitions for Modern Concepts" »

Variables and Constants

Variable

A named data location in a program for a value that can be changed throughout the execution of the program.

• Definition: A storage location containing data that can be modified.
• Usage: Once created and assigned, a variable can be used repeatedly and reassigned new values.
• Naming: Use descriptive names related to the stored data. Avoid spaces to prevent syntax errors.

Constant

A named data location in a program for a value that remains the same throughout the program's execution.

• Definition: A storage location for values that should not change.
• Benefit: Updating the value at the definition point automatically updates it everywhere the constant is used.

Data Types

• String: A sequence of characters or symbols.
• Numbers:
  • Integer: