Read‌ ‌the‌ ‌following‌ ‌passage‌ ‌and‌ ‌mark‌ ‌the‌ ‌letter‌ ‌A,‌ ‌B,‌ ‌C,‌ ‌or‌ ‌D‌ ‌on‌ ‌your‌ ‌answer‌ ‌sheet‌ ‌to‌ ‌indicate‌ ‌the‌ ‌correct‌ ‌answer‌ ‌to‌ ‌each‌ ‌of‌ ‌the‌ ‌questions‌ ‌from‌ ‌43‌ ‌to‌ ‌50.‌ ‌
There‌ ‌are‌ ‌two‌ ‌basic‌ ‌types‌ ‌of‌ ‌glaciers,‌ ‌those‌ ‌that‌ ‌flow‌ ‌outward‌ ‌in‌ ‌all‌ 
directions‌ ‌with‌ ‌little‌ ‌regard‌ ‌for‌ ‌any‌ ‌underlying‌ ‌‌terrain‌ ‌‌and‌ ‌those‌ ‌that‌ ‌are‌ ‌confined‌ ‌by‌ ‌terrain‌ ‌to‌ ‌a‌ ‌particular‌ ‌path.‌ ‌The‌ ‌first‌ ‌category‌ ‌of‌ ‌glaciers‌ ‌includes‌ ‌those‌ ‌massive‌ ‌blankets‌ ‌that‌ ‌cover‌ ‌whole‌ ‌continents,‌ ‌appropriately‌ ‌called‌ ‌ice‌ ‌sheets.‌ ‌There‌ ‌must‌ ‌be‌ ‌over‌ ‌50,000‌ ‌square‌ ‌kilometers‌ ‌of‌ ‌land‌ ‌covered‌ ‌with‌ ‌ice‌ ‌for‌ ‌the‌ ‌glacier‌ ‌to‌ ‌
qualify‌ ‌as‌ ‌an‌ ‌ice‌ ‌sheet,‌ ‌when‌ ‌portions‌ ‌of‌ ‌an‌ ‌ice‌ ‌sheet‌ ‌spread‌ ‌out‌ ‌over‌ ‌the‌ ‌ocean,‌ ‌they‌ ‌form‌ ‌ice‌ ‌shelves.‌ ‌
About‌ ‌20,000‌ ‌years‌ ‌ago‌ ‌the‌ ‌Cordilleran‌ ‌Ice‌ ‌sheet‌ ‌covered‌ ‌nearly‌ ‌all‌ ‌the‌ ‌mountains‌ ‌in‌ ‌southern‌ ‌Alaska,‌ ‌western‌ ‌Canada,‌ ‌and‌ ‌the‌ ‌western‌ ‌United‌ ‌States.‌ ‌It‌ ‌was‌ ‌about‌ ‌3‌ ‌kilometers‌ ‌deep‌ ‌at‌ ‌its‌ ‌thickest‌ ‌point‌ ‌in‌ ‌
northern‌ ‌Alberta.‌ ‌Now‌ ‌there‌ ‌are‌ ‌only‌ ‌two‌ ‌sheets‌ ‌left‌ ‌on‌ ‌Earth,‌ ‌those‌ ‌covering‌ ‌Greenland‌ ‌and‌ ‌Antarctica.‌ ‌Any‌ ‌domelike‌ ‌body‌ ‌of‌ ‌ice‌ ‌that‌ ‌also‌ ‌flows‌ ‌out‌ ‌in‌ ‌all‌ ‌directions‌ ‌but‌ ‌covers‌ ‌less‌ ‌than‌ ‌50,000‌ ‌square‌ ‌kilometers‌ ‌is‌ ‌called‌ ‌an‌ ‌ice‌ ‌cap.‌ ‌Although‌ ‌ice‌ ‌caps‌ ‌are‌ ‌rare‌ ‌nowadays,‌ ‌there‌ ‌are‌ ‌a‌ ‌number‌ ‌in‌ ‌northeastern‌ ‌Canada,‌ ‌on‌ ‌
Baffin‌ ‌Island,‌ ‌and‌ ‌on‌ ‌the‌ ‌Queen‌ ‌Elizabeth‌ ‌Islands.‌ ‌The‌ ‌second‌ ‌category‌ ‌of‌ ‌glaciers‌ ‌includes‌ ‌those‌ ‌of‌ ‌a‌ ‌variety‌ ‌of‌ ‌shapes‌ ‌and‌ ‌sizes‌ ‌generally‌ ‌called‌ ‌mountain‌ ‌or‌ ‌alpine‌ ‌glaciers.‌ ‌Mountain‌ ‌glaciers‌ ‌are‌ ‌typically‌ ‌identified‌ ‌by‌ ‌the‌ ‌landform‌ ‌that‌ ‌controls‌ ‌their‌ ‌flow.‌ ‌One‌ ‌form‌ ‌of‌ ‌mountain‌ ‌glacier‌ ‌that‌ ‌resembles‌ ‌an‌ ‌ice‌ ‌cap‌ ‌in‌ ‌that‌ ‌it‌ ‌flows‌ ‌outward‌ ‌in‌ ‌several‌ ‌directions‌ ‌is‌ ‌called‌ ‌an‌ ‌ice‌ ‌field.‌ ‌The‌ ‌difference‌ ‌between‌ ‌an‌ ‌ice‌ ‌field‌ ‌and‌ ‌an‌ ‌ice‌ ‌cap‌ ‌is‌ ‌‌subtle‌.‌ ‌Essentially,‌ ‌the‌ ‌flow‌ ‌of‌ ‌an‌ ‌ice‌ ‌field‌ ‌is‌ ‌somewhat‌ ‌controlled‌ ‌by‌ ‌surrounding‌ ‌terrain‌ ‌and‌ ‌thus‌ ‌does‌ ‌not‌ ‌have‌ ‌the‌ ‌domelike‌ ‌shape‌ ‌of‌ ‌a‌ ‌cap.‌ ‌
There‌ ‌are‌ ‌several‌ ‌ice‌ ‌fields‌ ‌in‌ ‌the‌ ‌Wrangell.‌ ‌St.‌ ‌Elias,‌ ‌and‌ ‌Chugach‌ ‌mountains‌ ‌of‌ ‌Alaska‌ ‌and‌ ‌northern‌ ‌British‌ ‌Columbia.‌ ‌Less‌ ‌spectacular‌ ‌than‌ ‌large‌ ‌ice‌ ‌fields‌ ‌are‌ ‌the‌ ‌most‌ ‌common‌ ‌types‌ ‌of‌ ‌mountain‌ ‌glaciers:‌ ‌the‌ ‌cirque‌ ‌and‌ ‌valley‌ ‌glaciers.‌ ‌Cirque‌ ‌glaciers‌ ‌are‌ ‌found‌ ‌in‌ ‌depressions‌ ‌in‌ ‌the‌ ‌surface‌ ‌of‌ ‌the‌ ‌land‌ ‌and‌ ‌have‌ ‌a‌ ‌characteristic‌ ‌circular‌ ‌shape.‌ ‌The‌ ‌ice‌ ‌of‌ ‌valley‌ ‌glaciers,‌ ‌bound‌ ‌by‌ ‌terrain,‌ ‌flows‌ ‌down‌ ‌valleys,‌ ‌curves‌ ‌around‌ ‌‌their‌ ‌‌corners,‌ ‌
and‌ ‌falls‌ ‌over‌ ‌cliffs.‌ ‌

All‌ ‌of‌ ‌the‌ ‌following‌ ‌are‌ ‌alpine‌ ‌glaciers‌ ‌EXCEPT____________.‌ ‌

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
The human criterion for perfect vision is 20/20 for reading the standard lines on a Snellen eye chart without a hitch. The score is determined by how well you read lines of letters of different sizes from 20 feet away. But being able to read the bottom line on the eye chart does not approximate perfection as far as other species are concerned. Most birds would consider us very visually handicapped. The hawk, for instance, has such sharp eyes that it can spot a dime on the sidewalk while perched on top of the Empire State Building.
It can make fine visual distinctions because it is blessed with one million cones per square millimeter in its retina. And in water, humans are farsighted, while the kingfisher, swooping down to spear fish, can see well in both the air and water because it is endowed with two foveae - areas of the eye, consisting mostly of cones, that provide visual distinctions. One fovea permits the bird, while in the air, to scan the water below with one eye at a time. This is called monocular vision. Once it hits the water, the other fovea joins in, allowing the kingfisher to focus both eyes, like binoculars, on its prey at the same time.
A frog’s vision is distinguished by its ability to perceive things as a constant motion picture. Known as “bug detectors”, a highly developed set of cells in a frog’s eyes responds mainly to moving objects. So, it is said that a frog sitting in a field of dead bugs wouldn’t see them as food and would starve. The bee has a “compound” eye, which is used for navigation. It has 15,000 facets that divide what it sees into a pattern of dots, or mosaic. With this kind of vision, the bee sees the sun only as a single dot, a constant point of reference. Thus, the eye is a superb navigational instrument that constantly measures the angle of its line of flight in relation to the sun. A bee’s eye also gauges flight speed. And if that is not enough to leave our 20/20 “perfect vision” paling into insignificance, the bee is capable of seeing something we can’t - ultraviolet light.
Thus, what humans consider to be “perfect vision” is in fact rather limited when we look at other species. However, there is still much to be said for the human eye. Of all the mammals, only humans and some primates can enjoy the pleasures of color vision.

According to the passage, why might birds and animals consider humans very visually handicapped?

Choose the best answer:
I don’t go _______ her views on private medicine.

Read the following passage and choose the best answer (A, B, C, D):
Rain pounded down on the roof. I was trying to read but the sound was too loud. I couldn’t help myself from being a little grumpy. I wanted to be outside playing, but the rain was keeping me inside. My mom had gone to the grocery store, and my dad was spending Saturday at the office. I had planned to spend the day hiking, but Mother Nature decided that today was the perfect day for rain. It meant that I would have to entertain myself. I spent most of the morning playing with my stuffed animals and reading. I was sitting next to the window staring out when I got a strange idea: why not just go outside anyway? I put on my boots and a big raincoat and stepped out into the wet world. It was raining hard but it wasn’t cold. All I could hear were raindrops and the wind. I decided to go on my hike anyway. My feet didn’t make any sound on the wet ground and the forest seemed different. I went to my favourite place and sat down. In the summer, my best friend Ellen and I would come here and sit for hours. It was our special place. All of a sudden, I thought I heard someone shouting my name. I turned and saw Ellen walking up behind me. “Oh my Gosh! It’s really you, Martha!” she said. “I can’t believe that you are out here right now. I thought I would be the only person crazy enough to go for a walk in the rain.” I was very happy to have some company. We decided that hiking in the rain was just as fun as hiking in the sunshine. We planned on hiking in the rain again.
4. What does Martha mean when she says “It meant that I would have to entertain myself”?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

   My family consists of four people. There's my father whose name is Jan, my mother whose name is Marie, my brother, Peter and of course, me. I have quite a large extended family as well but, only the four of us live together in our apartment in a block of flats. My father is fifty-two years old. He works as an accountant in an insurance company. He is tall and slim, has got short brown and gray hair and blue eyes. My father likes gardening very much as well as listening to music and reading books about political science. His special hobbies are bird watching and travelling.

   Now I’ll describe my mother and my brother. My mother is forty-seven and she works as a nurse in a hospital. She is small, and slim, has short brown hair and green eyes. She likes bird watching and travelling too, so whenever my parents are able to they go someplace interesting for nature watching. Since we have a cottage with a garden they both spend a lot of time there. My brother is sixteen. He is slim and has short brown hair and blue eyes. He also attends high school. He is interested in computers and sports like football and hockey. He also spends a lot of time with his friends.

   I have only one grandmother left still living. She is in pretty good health even at the age of seventyeight so she still lives in her own flat. I enjoy spending time with her when I can. Both my grandfathers died from cancer because they were smokers, which was really a great tragedy because I didn't get chance to know them. My other grandmother died just a few years ago. I also have a lot of aunts, uncles, and cousins. The cousin I’m closest to is my uncle’s daughter Pauline. We have a lot in common because we are both eighteen and so we are good friends.

   My parents have assigned me certain duties around the house. I don't mind helping out because everyone in a family should contribute in some way. I help with the washing up, the vacuuming and the shopping. Of course I also have to help keep my room tidy as well. My brother is responsible for the dusting and mopping. He also has to clean his own room. Even though my brother and I sometimes fight about who has to do what job, we are still very close. I am also very close to my parents and I can rely on them to help me. My parents work together to keep our home well maintained and it seem they always have a project or another that they are working on. They respect each other's opinions and even if they disagree they can always come to a compromise. I hope in the future that 1 have a family like ours.

 What happened to the writer’s grandfathers?

Though called by sweet-sounding names like Firinga or Katrina, tropical cyclones are huge rotating storms 200 to 2,000 kilometers wide with winds that blow at speeds of more than 100 kilometers per hour (kph). Weather professionals know them as tropical cyclones, but they are called hurricanes in the Caribbean Sea, typhoons in the Pacific Ocean, and cyclones in the Indian Ocean. They occur in both the northern and southern hemispheres. Large ones have destroyed cities and killed hundreds of thousands of people.

Tropical cyclones begin over water that is warmer than 27 degrees Celsius (80 degrees Fahrenheit) slightly north or south of the earth’s equator. Warm, humid air full of water vapor moves upward. The earth's rotation causes the growing storm to start to rotate around its center (called the eye). At the certain height, the water vapor condenses, changing to liquid and releasing heat. The heat draws more air and water vapor upward, creating a cycle as air and water vapor rise and liquid water falls. If the cycle speeds up until winds reach 118 kilometers per hour, the storm qualifies as a tropical cyclone.

Most deaths in tropical cyclones are caused by storm surge. This is a rise in sea level, sometimes seven meters or more, caused by the storm pushing against the ocean's surface. Storm surge was to blame for the flooding of New Orleans in 2005. The storm surge of Cyclone Nargis in 2008 in Myanmar pushed seawater nearly four meters deep some 40 kilometers inland, resulting in many deaths.

Which the following comes first in the process of storm formation?    

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
Fish that live on the sea bottom benefit by being flat and hugging the contours. There are two very differcent types of flatfish and they have evolved in very separate ways. The skates ad rays, relatives of the rharks, have become flat in what might be called the obivious way. Their bodies have grown out sideways to form grat “wings”. They look as though they have been flattened but have remained symmetrical and “the right way up”. Conversely, fish such sas plaice, sole, and halibut have become flat in a different way. There are bony fish which have a marked tendency to be flattened in a vertical direction; they are much “taller” than they are wide. They use their whole, vertically flattened bodies as swimming surfaces, which undulat through the water as they move. Therefore, when their ancestors migrate to the seabed, they lay on one side than on their bellies. However, this raises the problem that one eye was always looking down into the sand and was effectively useless – In evolution this problem was soleved by the lower eye “moving” around the other side. We see this process off moving around enacted in the development of every young bony flatfish. It starts life swimming near the surface, and is symmetrical and vertically flattened, but then the skull starts to grow in a strange asymmetrical twisted fashion,, so that one eye, for instance the left, moves over the top of the head upwards, an old Picasso – like vision. Incidentally, some species of 20 flatfish settle on the right side, others on left, and others on either side.

The author mentions skates and rays as examples of fish that     .

____ sure that you follow the instructions carefully.

(193)______

Read the following passage and choose the best answer (A, B, C, D):
The position of sport in today’s society has changed out of all recognition. People no longer seem to think of sports as ‘just a game’ – to be watched or played for the (1) _________ of enjoyment. Instead, it has become big business worldwide. It has become accepted practice for leading companies to provide sponsorship. TV companies pay large sums of money to screen important matches or competitions. The result has been huge rewards for athletes, some of (2) _________ are now very wealthy, particularly top footballers, golfers and tennis players. (3) ________ , it is not unusual for some athletes to receive large fees on top of their salary, for advertising products or making personal appearances. A trend towards shorter working hours means that people generally tend to have more free time, both to watch and to take in sporting activity; sport has become a significant part of the recreation industry that we now rely (4) _________ to fill our leisure hours. Professional sport is a vital part of that industry, providing for millions of (5) _________ people all over the world.

Fill in each numbered blank with one suitable word or phrase.

The Early Life of Bill Gates

While Bill Gates had to work (1)………..to become what he is today, his story isn’t exactly a rags-to-riches one as he was born into a fairly wealthy family. His father was a successful attorney while his mother was a school teacher who went onto a member of the Board of Directors of the First Interstate Bank. Gates was a bright student and (2) ……….well academically, especially in mathematics. And, this was exemplified by the 800 points that young Bill Gates scored in the mathematics part of an intelligence test.

Bill Gates developed a (3) ………..for computers and programming as early as 13. At the same age, Gates enrolled in the Lakeside School, a private preparatory school. While Gates was still at the school, the school administration decided to buy a computer from the General Electric Company. (4) ………his flare in programming, the school administration excused Gates from classes to allow him to (5) ………….his interest. On the GEC machine, Bill Gates built his first ever computer program.

At the school, Gates met Paul Allen and they worked (6)………..to find bugs in a system belonging to Computer Center Corporation. In exchange for computer time and royalties, Gates and Allen along with two other students wrote a payroll program for Information Sciences. This led to Gates’ school becoming fully aware (7)………..his talent and they had him build a program (8)………..scheduled students in classes.

Gates and Allen continue to build software and at just the age of 15, Bill Gates sold a software to optimize traffic for $$ 20,000. A few years later, he developed another software and earned $$ 30,000 from (9)...... And, this was the start of Bill Gates’ journey to a billion-dollar (10)…………..

(6)……….

Rewrite the sentence
The valley is so dangerous to live in.

Choose the best answer:
Do you find the internet ______, Nam?

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
(1)...................... in technology have made a lot of changes to our everyday lifestyles, but one of the biggest has got to be how we read books. Since the invention of the e–book, there has been a significant change to our reading habits. Given the choice between taking a couple of heavy paperbacks on holiday or an e–book device like a Kindle, most of us, including our parents and grandparents, would unsurprisingly opt (2)................... the Kindle.
But  what  would  our  lives  be  like  with  no  books  at  all?  It’s  a  (3).......... question. Some educational specialists are making predictions that in the future we won’t even see books in classrooms – everything will be done online! (4).................. of the idea of getting rid of books say that there will always be a need for paper–based versions of materials. However, to be realistic, we have to accept that there is a (5)..............chance that in a decade’s time schools and classrooms will be book–free! What do you think of that?

(5)....................................

Choose the best answer:
I am having a math lesson but I forgot my ………….. I have some difficulty.

Choose the best answer:
My village is about 100 kilometers ___ the south of Ho Chi Minh City.

Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions.
Together, the thousands of scientists and conservation organizations that contribute to the International Union for Conservation of Nature (IUCN) Red List and other systems of assessment provide the world's largest knowledge base on the global status of species. The aim of these systems is to provide the general public, conservationists, nongovernmental organizations, the media, decision makers, and policy makers with comprehensive and scientifically rigorous information on the conservation status of the world's species and the threats that drive the observed patterns of population decline. Scientists in conservation and protected area management agencies use data on species status in the development of conservation planning and prioritization, the identification of important sites and species for dedicated conservation action and recovery planning, and educational programs. Although the IUCN Red List and other similar species-assessment tools do not prescribe the action to be taken, the data within the list are often used to inform legislation and policy and to determine conservation priorities at regional, national, and international levels. In contrast, the listing criteria of other categorization systems (such as the United States Endangered Species Act, the CITES) are prescriptive; they often require that landowners and various governmental agencies take specific mandatory steps to protect species falling within particular categories of threat It is likely that many undescribed or unassessed species of plants, animals, and other organisms have become or are in the process of becoming extinct. To maintain healthy populations of both known and unknown species, assessments and reassessments are valuable tools. Such monitoring work must continue so that the most current knowledge can be applied to effective environmental monitoring and management efforts. For many threatened species, large well-protected conservation areas (biological reserves) often play major roles in curbing population declines. Such reserves are often cited by conservation biologists and other authorities as the best way to protect individual species as well as the ecosystems they inhabit. In addition, large biological reserves may harbor several undescribed and unassessed species. Despite the creation of several large reserves around the world, poaching and illegal trafficking plague many areas. Consequently, even species in those areas require continued monitored and periodic assessment.
2. According to the passage, which of the following statements is TRUE about the IUCN Red List?

Choose the best answer:
The restaurant has the______for serving some of the finest food.

Read the following passage and choose the best answer (A, B, C, D):
It's only 36 centimeters tall, but to fans throughout the world, it represents the highest achievement in football. Every four years, teams from all over the globe compete to take home the FIFA World Cup Trophy, yet nobody ever does. Do you know why? Nobody ever takes it home because the 18-carat gold trophy is kept under lock and key by FIFA (Federation Internationale de Football Association). The champions of each World Cup tournament receive only a replica. This is to protect the valuable prize from thieves, who have stolen the World Cup trophy twice in its 75-year history. The little trophy has certainly had a troubled existence. The original trophy was made by a French sculptor, Abel LaFleur, and was called the "Jules Rimet Cup," in honor of the founder of the World Cup tournament. Sometime during the first three World Cup events (1930, '34 and '38), the name changed to simply the "World Cup." Then during World War II, not much was seen or heard of the trophy. It was being kept hidden in a shoe box under the bed of Dr. Ottorino Barassi, the Italian vice-president of FIFA, to prevent it from falling into the hands of the Nazi army. Although the trophy made it safely through the war, it didn't fare so well during the turbulent 1960s. In 1966, the Cup was stolen during a public showing of the trophy prior to the World Cup tournament in England. Luckily, it was found a short time later none the worse for wear in a trash container, by a little dog named Pickles. Four years later, Brazil earned permanent possession of the original trophy by winning its third World Cup title. Unfortunately, the trophy was stolen a second time, in 1983, and was never recovered. The Brazilian Football Association had to have a duplicate trophy made. After the first trophy became the possession of Brazil's football association, a new World Cup Trophy for FIFA was designed by an Italian artist, Silvio Gazazniga, in 1974. This trophy cannot be won outright, but remains in the possession of FIFA, and rest assured they are keeping a close eye on it. Today, World Cup winners are awarded a replica of the trophy that is gold-plated, rather than solid gold like the real one. Gazazniga's World Cup trophy weighs almost five kilograms. Its base contains two layers of a semi-precious stone called malachite, and has room for 17 small plaques bearing the names of the winning teams -enough space to honor all the World Cup champions up to the year 2038. After that, a new trophy will have to be made.
4. Which is true about Gazazniga's World Cup trophy?

Rewrite the sentence
I haven’t been to this gallery before.

Read the passage below carefully, and then choose the best answer:
In 1971, Sue Coppard worked as a secretary in London. While she enjoyed city life, Sue also missed the countryside where she spent most of her time as a child. So she offered to help out on a farm, or more specifically, an organic farming programme organized by a nearby college. She got a few people to volunteer as well, and they spent the weekend doing “housework,” which involved clearing bushes and cleaning drains. Afterwards, the farm managers said they could come back anytime to help out. Sue put a small ad in a magazine, offering people the chance to volunteer at the organic farm. The volunteer programme grew quickly, and soon other organic farmers joined in, asking for people to help out. With so many people and farms involved, someone needed to organize the different groups. A few of the original volunteers started WWOOF (World Wide Opportunities on Organic Farms) to help volunteers and farmers find one another. Today, at least 50 different countries have WWOOF organizations, and many other countries have individual farms that participate in the movement. While WWOOF is still a weekend activity for some, it now welcomes travellers and people who visit to live and work on farms for longer periods of time. WWOOF volunteers can stay on a farm for weeks or even months at a time in exchange for hands-on farming and gardening experience. The work can be exhausting, but volunteers think it’s worth it. By working on farms, the volunteers interact with farmers and develop a love for the outdoors and organic farming. Many travellers now use WWOOFing as a way to visit new countries and experience new cultures. As travellers will discover, every WWOOF opportunity is a bit different. In Serbia, you can find Misa and Olja, a couple whose farm is known for its hard cheeses and for its bread made from homegrown grains. Finca Amiruca, a farm in Ecuador, teaches volunteers how to grow peanuts, plantains, and yucca. When volunteering in Japan, you may get to learn about growing rice. WWOOF is only one of the many unique volunteer opportunities available. Volunteering is something that anyone can do, and a wide variety of organizations accept or even welcome volunteers. So the next time you get the itch to be active on the weekend or on vacation, why not look for a good cause to spend your energy on?
4. Which is NOT a change that WWOOF has undergone since it first started?

Read the passage below carefully, and then choose the best answer:
The Invention of the Periodic Table
If you are looking to gain a better understanding of the world around you, chemistry is the perfect subject to study. It is an examination of matter, its properties, and its interactions with everything around it. Where physics often deals with concepts and theories that are difficult to test and observe, chemistry principles can easily be applied to medicine, cooking, and several other areas. At the heart of all these discoveries is one vital chart that organizes elements based on their atomic number and chemical properties: the periodic table. Although the first periodic table was published in 1869, it was a work in progress for hundreds, if not thousands of years. Since ancient times, people have been fascinated with elements such as gold, tin, and copper in their natural forms. They were mined and used to make jewellery, weapons, coins, and many other things. Over time, people became more curious about these metals and how they were composed. In ancient Greece, Aristotle and other philosophers claimed things were made from the elements of earth, water, fire, and air. For years, this theory was accepted. Then people began to reevaluate this concept during the Age of Enlightenment. In 1661, Irish scientist Robert Boyle defined an element as something that “cannot be broken down into a simpler substance by a chemical reaction”. Over a century later, French chemist Antoine-Laurent Lavoisier would publish the first modern textbook on chemistry. In it, he listed several substances which he believed should be classified as elements into two categories: metals, and non-metals. Although his work wasn’t completely accurate, it represented a major step forward at the time. Over the next century, scientists started to classify the elements into different groups depending on their properties and atomic weights. However, it is Russian chemist Dmitri Mendeleev who is usually credited as the first person to make a periodic table. Although other scientists had submitted tables, they were eventually rejected by the scientific community for a lack of detail. Mendeleev arranged all of the elements according to their atomic mass. He was even smart enough to leave empty spaces for elements which hadn’t been discovered at the time. Although Mendeleev’s periodic table wasn’t perfect, it set the format which is similar to the one used today.
2. How is chemistry different from physics?