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Critical reading is not easy. It is important to slow down when we read and to become an active participant. We should mark up the text with our reactions, conclusions and questions. 

We should not overwind the clock when we are winding it. This is important because the main string can coil too tightly and it can be broken.

Airplanes are classifiable into various classes including land planes, carrier-based airplanes, seaplanes, amphibians, vertical takeoff and landing, short takeoff and landing, and space shuttles.

While on a voyage for Spain in October 1492 in search of a direct sea route from Europe to Asia, Christopher Columbus unintentionally discovered the Americas.

In the old days, black-and-white camera film was very sensitive to blue light but not to red light. Blue skies would shown very little detail. Thus, the photographers would put the red filter on the lens, so the film could record skies fluffy clouds.

Reality TV shows will have effect on traditional dramas and comedies.  As reality TV increases in popularity, there will be less traditional programs which will be replaced with the latest in reality TV.

The horse has played a little-known but very important role in the field of medicine. Horses were injected with toxins of diseases until their blood built up immunities. Then a serum was made from their blood. Serums to fight both diphtheria and tetanus were developed in this way.

Human Nutrition is the study of how food affects the health and survival of the human body. Human beings require food to grow, reproduce, and maintain good health.

Belgrade is the capital and largest city of Serbia. It is located at the confluence of the Sava and Danube rivers and the crossroads of the Pannonian Plain and the Balkan Peninsula. Nearly 1.7 million people live within the administrative limits of the City of Belgrade. 

It can be said that the best recipes for clam chowder all include onions and a bay leaf. The onions add sharpness and help remove slimy texture of clams. On the other hand, the bay leaf complements the onion’s strong flavor.

Scientists have determined that Mars’s atmosphere consists primarily of carbon dioxide, with small amounts of nitrogen, oxygen, water vapor, and other gases. Because the atmosphere is extremely thin, daily temperatures can vary as much as 100° Celsius.

The ability to differentiate between fact and opinion is a very important skill. Like a detective, you need to know the difference between what people think and what people know, between what people believe to be true and what has been proven to be true.

A White Dwarf is an old star that has exhausted its available nuclear fuel and collapsed. However, it continues to radiate light from thermal energy trapped in it during its collapse. White dwarfs are the final luminous phase in the evolution of low-to-medium-mass stars.

A lot of  people in the United States want an anthology that includes the complete works of  Shakespeare. The psychological insights he portrays in both male and female characters are amazing even today and they are the reason for this renewed interest.

Volcanoes are formed by the accumulation of materials erupted through one or more openings (called volcanic vents) in the earth's surface. The term volcano can also refer to the vents themselves. Most volcanoes have steep sides, but some can be gently sloping mountains or even flat tablelands, plateaus, or plains.

It’s a scientifically proven fact: People remember most what they learn first and last in a given session. Writers have known this instinctively for a long time. That’s why many pieces of writing are organized not in chronological order but by order of importance.

Fruška gora (Serbian Cyrillic: Фрушка гора) is a mountain in northern Serbia. Most of the area is administratively part of Serbia, but a small part on its western side extends into eastern Slavonia. The area under Serbian administration forms the country's oldest national park. Sometimes it's also referred to as the Jewel of Serbia, due to its largely pristine landscape and protection effort, or the Serbian Mount Athos, it being the home of a large number of Orthodox monasteries.

The piano is an acoustic, stringed musical instrument invented in Italy by Bartolomeo Cristofori around the year 1700 (the exact year is uncertain), in which the strings are struck by wooden hammers that are coated with a softer material (modern hammers are covered with dense wool felt; some early pianos used leather). It is played using a keyboard, which is a row of keys (small levers) that the performer presses down or strikes with the fingers and thumbs of both hands to cause the hammers to strike the strings.

There are no effective boundaries when it comes to pollutants. Toxic insecticides have been banned in many countries, but they are coming from the countries where they remain legal. Also, in this paragraph we can see that compounds such as DDT and toxaphene have been found in remote places like the Yukon and other Arctic regions.

Exobiology is the study of the origin, evolution and distribution of life in the universe. Exobiologists investigate how the formation of stars and solar systems led to the existence of planets suitable for life, how life originated on Earth and perhaps elsewhere, and which factors influenced biological evolution.

The Constitution protects citizens against unreasonable searches and seizures. Without a written search warrant, no search for person's home or personal effects may be conducted. This means that judge must justify a search.

Plato, the famous Greek philosopher, taught that the things of the world around us are merely copies or “shadows” of greater, eternal realities. He used a metaphor of people living inside a cave to convey his ideas. The people inside the cave could not see the world outside the cave, they could only see shadows of people and animals as they passed by.

One of the good things about mathematics is that it allows us to expand our consciousness. Mathematics tells us about economic trends, patterns of disease; it is good at exposing the truth, but it can also perpetuate misunderstandings and untruths. Figures have the power to mislead people.

Chocolate is a food product made from roasted and ground cacao pods, that is available as a liquid, solid or paste, on its own or as a flavoring agent in other foods. Cacao has been consumed in some form since at least the Olmec civilization (19th-11th century BCE), and the majority of Mesoamerican people - including the Maya and Aztecs - made chocolate beverages.

To form a star, a cloud of interstellar hydrogen gas and dust particles condenses under the mutually attractive force of gravitation. The cloud's central temperature rises to cause hydrogen atoms to fuse to helium. Then, the resulting outward force of electromagnetic radiation and the inward gravitational force reach equilibrium, and the star stabilizes.

In order to solve a crime, a detective cannot just get the facts of the case, just discover the motive, just decipher difficult clues, or just distinguish between fact and opinion. To be successful, a detective must do all these things at the same time. Similarly, reading really can’t be broken down into these separate tasks. Reading comprehension comes from employing all of these strategies simultaneously.

Mercury orbits closer to the Sun than any other planet. This makes it dry, hot, and virtually airless. Although the planet’s cratered surface resembles that of the Moon, it is believed that the interior is actually similar to Earth’s, consisting primarily of iron and other heavy elements.

Today’s postal service is more efficient than ever. Once upon a time, it took months to deliver a mail by horse and foot and today it moves around the country in days by truck, plane or train.  If your package is urgent, the U.S. Postal Service offers Priority Mail and Express Mail services.  Priority Mail is guarantees to go anywhere in USA in two days or less and Express Mail service will get your package there overnight.

Silva was a weaver and did not like to share. Silva was very stingy. His life was very monotonous, but that all changed when he adopted Eppie. Eppie was a very curious girl. Eppie brought freshness to Silva's life. Then Silva began to change his life habits. He became better person and he stopped to be obsessed with gold.

In nutrition, diet is the sum of food consumed by a person or other organism. The word diet often implies the use of specific intake of nutrition for health or weight-management reasons (with the two often being related). Although humans are omnivores, each culture and each person holds some food preferences or some food taboos. This may be due to personal tastes or ethical reasons. Individual dietary choices may be more or less healthy.

The OPEC is international organisation of the Petroleum Exporting countries. When this organisation established, in 1965, it had five members, but in this moment this organisation has 13 member countries. The main mission of this organisation is controlling and making efficient petroleum market and coordination and consolidation of the petroleum policy of the member countries. So the letter P in this abbreviation stands for Petroleum.

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing and other applications.

Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules. It has been a part of the official program of the Summer Olympic Games since Tokyo 1964. Beach Volleyball was introduced to the programme at the Atlanta 1996. The adapted version of volleyball at the Summer Paralympic Games is sitting volleyball.

Vitamins and minerals are found in a wide variety of foods. However, some foods are better sources of specific vitamins and minerals than others. For example, sweet potatoes are rich in vitamin A, but white potatoes contain almost none of this vitamin. Because of these differences in vitamin and mineral content, it is wise to eat a wide variety of foods.

Bački Jarak (Serbian Cyrillic: Бачки Јарак) is a town located in the Temerin municipality, in the South Bačka District of Serbia. It is situated in the Autonomous Province of Vojvodina. The town has a Serb ethnic majority and its population numbering 5,687 people.

History  is the study of the past. Events before the invention of writing systems are considered prehistory. "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events. Historians seek knowledge of the past using historical sources such as written documents, oral accounts, art and material artifacts, and ecological markers.

Plankton is a collective term for a variety of marine and freshwater microscopic organisms that drift on or near the surface of the water. Plankton is of two types: phytoplankton, and zooplankton. Marine phytoplankton is the first link in the vast aquatic food chain. The zooplankton, which feeds on the phytoplankton, is consumed in turn by larger animals such as fish and even by the largest mammal, the blue whale. An estimated ninety percent of all photosynthesis and release of free oxygen takes place in the oceans. The high protein content of plankton has stimulated research on it as a potential food source for humans.

Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports, occupations and daily activities. Physical fitness is generally achieved through proper nutrition, moderate-vigorous physical exercise, and sufficient rest. Before the industrial revolution, fitness was defined as the capacity to carry out the day's activities without undue fatigue or lethargy. However, with automation and changes in lifestyles physical fitness is now considered a measure of the body's ability to function efficiently and effectively in work and leisure activities, to be healthy, to resist hypokinetic diseases, and to meet emergency situations.

The space exploitation will certainly improve the living standards on the Earth. Besides making a few billionaires even wealthier, it will help the ordinary people, too. We will all gain from the mineral bounty and spin-off technologies. However, there are many downsides that deserve careful consideration. There are many people disapproving of this action. Some argue that space is no tours to despoil, and that it should be left pristine. Also, the resources that are valuable in orbit or beyond may be different from those we prize on Earth. Moreover, there is no consensus on regulation, which makes the gains insecure.

Some students prefer to discuss all of the similarities of a topic or issue first and then move on to discuss the contrasting elements in the separate blocks of paragraphs that follow. Still others prefer to alternate their focus by shifting from comparison to contrast on a point-by-point basis throughout the entire essay. Either style is fine, as long as the key points are restated in your concluding paragraph.

Mariner is the name of a series of ten United States space probes launched from 1962 to 1973. Mariner space probes were designed to explore Mercury, Venus, and Mars, the three planets of the inner solar system. All Mariner spacecrafts were launched by an Atlas Agena rocket, a military intercontinental ballistic missile. The probes used four solar panels to gather sunlight for electrical power. The orientation and trajectory of the craft were aligned to the positions of either the sun and the earth, or the sun and the bright star Canopus. The probes communicated with scientists and engineers on the earth by continuous radio transmissions.

Acquired Immunodeficiency Syndrome (AIDS) is a human viral disease that ravages the immune system, undermining the body’s ability to defend itself from infection and disease. Caused by the human immunodeficiency virus (HIV), AIDS leaves an infected person vulnerable to opportunistic infections and rare cancers. Opportunistic infections are harmless in healthy people, but in those whose immune systems have been greatly weakened, they tax the weakened immune system, and prove fatal.

Style is the manner in which writers express their ideas in writing. Style is composed of three main elements: sentence structure, degree of description and detail, and degree of formality. Some writers use a very formal style; others may write in a casual style. Certain styles are best for particular audiences or purposes. For example, a high degree of formality with specific details but without any unnecessary description would be appropriate for business, where time is money and writers should get to the point as quickly as possible.

Until recently it was thought that dolphins, porpoises and bats were the only mammals to use echolocation to locate prey and to navigate their environment. New research suggests that 'great whales', like the blue whale and the humpback whale, might be able to 'see' in a similar way. Underwater sound recordings of humpback whales have captured sonar clicks similar to those made by dolphins.

Visual learners learn best by seeing. If you would look at a map for directions, you are probably a visual learner. You understand ideas best when they are in pictures or graphs. You may learn better by using different colors as you take notes. Use a highlighter (or several, in different colors) as you read, to mark important ideas. Mapping and diagramming ideas are good learning strategies for visual learners.