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All That Jazz: Jazz is an American musical art form which originated at the beginning of the 20th century in African-American communities in the Southern United States. It derived from a confluence of African and European music traditions. From its early development until the present, jazz has also incorporated music from 19th and 20th century American popular music. The word jazz began as a West Coast slang term of uncertain derivation and was first used to refer to music in Chicago in about 1915.
Improvisation is one of the key elements of jazz and a fundamental part of the nature of the music. In jazz, the skilled performer will interpret a tune in very individual ways, never playing the same composition exactly the same way twice. Depending upon the performer's mood and personal experience, interactions with fellow musicians, or even members of the audience, a jazz musician/performer may alter melodies, harmonies, or time signatures at will.
What is the definition of 'confluence' as used in the first paragraph?
- A. Influence.
- B. Melding.
- C. Intersection.
- D. Coming Together.
Correct Answer: D
Rationale: The correct answer is D: Coming Together.
Explanation: In the context of the paragraph, 'confluence' refers to the merging or coming together of African and European music traditions to form jazz. This term signifies the blending and integration of different musical influences to create a new art form. 'Influence' (choice A) implies one-way impact, 'melding' (choice B) suggests mixing without a distinct merging, and 'intersection' (choice C) indicates a meeting point but not necessarily a merging or fusion, making them all less fitting than 'coming together' in conveying the essence of 'confluence' in this context.
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About 6% of the earth is covered by rainforests. The largest rainforest in the world is the
Amazon Basin, which stretches over 2.3 million square miles in nine different South American countries. This area is double the length of all the other remaining rainforests in the world. Brazil contains 60%of the Amazonian rainforest, since it lies at the mouth of the river Amazon. This river is the second largest in the world and contains more than one-fifth of the world's fresh water. The Amazon rainforest is a type of wet broadleaf forest. The weather there is very humid and warm as it rains quite a bit. Because of the high rainfall, the forest is very rich and green. The
tree leaves are pointed and narrow so that the raindrops can easily drop off wet plants. This
tropical rainforest has more living species than the entire European continent. There are over 400 types of insects living in one single rain forest tree for a total of 2.5 million species. One square kilometer of rainforest may contain over 75,000 types of trees and approximately 438,000
different kinds of plants, which comes to a total of 90,000 tons of greenery overall. The Amazon rainforest is home to 2,000 birds and mammals, with one in every five birds in the world living there. Local farmers have lived off this rich and diverse land for thousands of years. They have been able to find food and water here without destroying the land. The Kayapo people of Brazil
farm in an environmentally-friendly way. Instead of chemicals, they use burned wood to enrich the soil, and plant banana trees, which attract wasps. These wasps then feed on leafcutter ants and get rid of these harmful insects. The rainforest also offers a lot of tropical fruits, such as bananas and coconuts, as food.
Cinnamon is made from the bark of a rainforest tree. Amazonian Indians use the fruit and stem
of the Buruti plant as a drink, to make bread and to build houses. Many other plants are used as medicine. But the Amazon rainforest is in very big danger of disappearing. 9,169 square miles of
forest have been cut down in 2003 in Brazil alone. An area of the size of a football field is burned down basically every minute, which means that the rain forest may be gone by the year 2030.The dangers related to this type of activity are obvious. Trees take in poisonous carbon
dioxide from the air and give off oxygen. There is more oxygen and less carbon dioxide around a
rainforest. When trees are cut down, however, the amount of carbon dioxide increases, and the
air gets warmer. This leads to global warming, which is extremely harmful to the environment. It
is estimated that the burning of Brazilian rainforests alone produces 200 million metric tons of carbon dioxide ayear. Another danger connected with destroying the rainforest is the disappearance of plants and animals. When trees are cut down, plants and animals have no more
food left and slowly die out. Killing wild animals is illegal in Brazil, but there is plenty of stealing going on. 38 million animals are stolen and sold illegally each year. The most hunted
animals are birds, especially parrots, followed by snakes and the jaguar.
What is referred to as 'rich and diverse land' at the beginning of paragraph 3?
- A. 400 types of insects in the Amazon rainforest
- B. 2,000 birds and mammals in the Amazon rainforest
- C. The many kinds of plants growing in the Amazon rainforest
- D. The large variety of Amazonian plants and animals
Correct Answer: B
Rationale: In the text provided, the author mentions that the Amazon rainforest is home to 2,000 birds and mammals, which is an illustration of the rich and diverse ecosystem within the area. This information directly corresponds to the statement about the 'rich and diverse land' at the beginning of paragraph 3. Therefore, the correct answer is option B, as it aligns with the specific details presented in the text.
ALL THE JAZZ
Jazz has been described as "the art of expression set to music" and "America's great contribution to music." It has served as popular art, enjoying periods of widespread public interest during the "jazz age" of the 1920s, the "swing era" of the late 1930s, and the peak popularity of modern jazz in the late 1950s. The standard narrative is that jazz originated around the end of the 19th century in New Orleans before moving up the Mississippi River to cities like Memphis, St. Louis, and finally Chicago. Jazz emerged by blending elements of ragtime, marching band music, and the blues. However, its roots trace back to tribal African drum beats and European musical structures. Buddy Bolden, a New Orleans barber and cornet player, is generally considered the first real jazz musician, emerging around 1891. What sets jazz apart from earlier musical forms is its emphasis on improvisation. Unlike traditional music, where composers write entire pieces on paper for musicians to follow exactly, jazz offers a starting point—a skeletal guide for musicians to improvise around. Many early jazz musicians were poor sight readers, with some unable to read music at all. Consequently, they often struggled to make a living, working menial jobs to survive. The second wave of New Orleans jazz musicians included notable figures like Joe Oliver, Kid Ory, and Jelly Roll Morton. These artists formed small bands, built upon earlier styles, and enhanced the music's complexity, achieving greater success. This energetic style became known as "hot jazz" due to its fast tempos and rhythmic drive. A young cornet player named Louis Armstrong was discovered by Joe Oliver in New Orleans. Armstrong went on to become one of the greatest and most successful musicians of all time, later emerging as a global star. The impact of Armstrong and other talented early jazz musicians transformed our perception of music.
Derivation of the word "Jazz"
- A. East coast slang
- B. West coast slang
- C. Southern dialect
- D. Northern jargon
Correct Answer: B
Rationale: The correct answer is B: 'West coast slang.' The word 'Jazz' is believed to have originated as West coast slang, specifically in the early 20th century. It was initially used in reference to a style of music that emerged in African American communities. Over time, the term 'Jazz' became widely recognized and associated with this unique genre of music, known for its improvisational elements and rhythmic complexities.
Blood Pressure Regulators The body is composed of systems that have evolved and diversified in order to maintain the natural functions and processes they regulate. One such system that has these regulators is the body’s cardiovascular system. The body’s pump, which regulates the flow of vitally needed oxygen to all cells of the body, as well as the discard of carbon dioxide and other waste products, is the heart. Because blood pressure varies at different points within the body, differing components are needed to keep the body’s blood pressure regulated. Three of the basic components are baroreceptors, chemoreceptors, and the kidneys. Baroreceptors are stretch receptors composed of fine branching nerve endings and are contained along the walls of the arteries near the heart and in other areas of the body as well. Impulses are related to this stretching along the arterial walls, which causes these baroreceptors to send out even more impulses to the heart, arteries, and veins, causing the blood pressure to go either up or down. Chemoreceptors are located along the walls of the arteries and monitor changes in oxygen level, carbon dioxide, and pH. Just think! A fall in oxygen causes receptors to send impulses to raise the blood pressure. The kidneys play a role in regulating blood pressure by absorbing salts and water and removing wastes. Hormones secreted by the adrenal cortex cause the kidney to keep or let go of any salt and water. This has an influence on blood volume and consequently on blood pressure.
What does the word 'evolved' mean in the first paragraph?
- A. To spread
- B. To gradually develop
- C. To revolve
- D. To shift
Correct Answer: B
Rationale: The term 'evolved' in the context of the first paragraph means 'to gradually develop.' The sentence refers to the systems in the body evolving and diversifying over time to maintain natural functions. Evolution implies a gradual process of development and change over time, making choice B the correct answer.
The Summer Olympic Games. Once every four years the countries of the world send their best and brightest to participate in the Summer Olympic Games. The site for the event is decided years before, and most countries contend strongly for the privilege to host the Games. The 2008 games were held in Bejing, China.
There is a lot of pageantry and tradition attached to the event. The opening ceremony is elaborate and awe-inspiring. China put on a spectacularly beautiful fireworks display to welcome the world's athletes in 2008.
The track events, water events (swimming, diving) and precision activities such as archery and rhythmic gymnastics are wonderful to watch. Seeing these athletes perform their special skills is a treat for those of us who achieve a vicarious satisfaction from it. Everyone roots for the athletes from their own country and we thrill when our anther is played during the medal ceremony. Being an Olympian is an honor every athlete dreams of.
How often are the Summer Olympic Games held?
- A. Every two years.
- B. Every four years.
- C. Annually.
- D. Once a decade.
Correct Answer: B
Rationale: The Summer Olympic Games are held 'once every four years,' as stated in the text. This timeframe allows countries to send their best athletes to participate. The correct answer is B, 'Every four years,' making it a significant and eagerly anticipated global event. The four-year interval also allows for ample time for countries to prepare, build excitement, and showcase their best talents on a world stage.
Doppler Effect
Have you ever wondered why the whistle of a traveling, distant locomotive predicts its approach several yards before anyone actually sees it? Or why an oncoming ambulance's screaming siren is heard momentarily several feet before the ambulance comes into full view, before it passes you, and why its siren is still heard faintly well after the ambulance is out of sight?
What you are witnessing is a scientific phenomenon known as the Doppler Effect. What takes place is truly remarkable. In both of these instances, when the train or ambulance moves toward the sound waves in front of it, the sound waves are pulled closer together and have a higher frequency. In either instance, the listener positioned in front of the moving object hears a higher pitch. The ambulance and locomotive are progressively moving away from the sound waves behind them, causing the waves to be farther apart and to have a lower frequency. These fast-approaching modes of transportation distance themselves past the listener, who hears a lower pitch.
Which sound waves have a lower pitch?
- A. Sound waves that are closer together
- B. Sound waves that are farther apart
- C. Sound waves that travel a long distance
- D. Sound waves that travel a short distance
Correct Answer: B
Rationale: Sound waves that are farther apart have a lower pitch. In the Doppler Effect, as a source of sound moves away from a listener, the sound waves get stretched out, causing a decrease in frequency and resulting in a lower pitch. Conversely, when a source of sound moves toward a listener, the sound waves get compressed, leading to an increase in frequency and a higher pitch. This phenomenon explains why the pitch of sound changes depending on whether the source is moving towards or away from the listener.