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When the air is clear, the sunset will appear yellow, because the light from the sun has passed a long distance through air and the blue light has been scattered away. If the air is polluted with small particles, natural or otherwise, the sunset will be more red. Sunsets over the sea may also be orange, due to salt particles in the air. The sky around the sun is seen reddened, as well as the light coming directly from the sun. This is because all light is scattered relatively well through small angles, but blue light is then more likely to be scattered twice over the greater distances, leaving the yellow, red and orange colors.

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Autism is a brain development disorder that impairs social interaction and communication and causes restricted and repetitive behavior, all starting before a child is three years old. The genetics of autism are complex and it is generally unclear which genes are responsible for it. Autism affects many parts of the brain but how this occurs is also poorly understood. Autism is strongly associated with agents that cause birth defects. Other proposed causes, such as childhood vaccines, are controversial and the vaccine hypotheses lack convincing scientific evidence. The number of people known to have autism has increased dramatically since the 1980s. Parents usually notice signs in the first two years of their child’s life. Early behavioral cognitive intervention can help children gain self-care, social and communication skills but there is no cure for it. Few children with autism live independently after reaching adulthood, but same become successful and an autistic culture has developed, with same seeking a cure and others believing that autism is a condition rather than a disorder.

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Traditionally, many linguists stressed the importance of mastering grammar structures first while teaching English. In recent years, the majority of educators have become more aware of the fallacy of this approach and other approaches promoting vocabulary development have gained popularity. It has been found out without vocabulary to put on top of the grammar system, the learners can actually say very little despite being able to manipulate complex grammatical structures in exercise drills. It is obvious that to learn English, one needs to learn many words. Native speakers have a vocabulary of about 20,000 words but foreign learners of English need far fewer. They need only about 5,000 words to be quite competent in speaking and listening. The reason for this seemingly small number is the nature of words and the frequency with which they appear in a language. It seems clear that frequent words should be among the first words to learn because they will be met most of ten and will be needed in speech or writing.

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You may have heard that tomatoes and processed tomato products like tomato sauce and canned tomatoes protect against some types of cancer. The cancer-preventing properties of tomato products have been attributed to lycopene. It is a bright red pigment found in tomatoes and other red fruits and is the cause of their red color. Unlike other fruits and vegetables, where nutritional content such as vitamin C is diminished upon cooking, processing of tomatoes increases the concentration of lycopene. Lycopene in tomato paste is four times more than in fresh tomatoes. This is because lycopene is insoluble in water and is tightly bound to vegetable fiber. Thus, processed tomato products such as pasteurized tomato juice, so up, sauce, and ketchup contain the highest concentrations of lycopene. Cooking and crushing tomatoes as in the canning process and serving in oil-rich dishes such as spaghetti sauce or pizza greatly increase assimilation from the digestive tract into the bloodstream. Lycopene is a fat-soluble substance, so the oil is said to help absorption to a great extent.

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The grey wolf also known as the timber wolf or wolf is a mammal of the order Carnivore. Genetic studies indicate the grey wolf shares a common ancestry with the domestic dog and might be its ancestor. Many other grey wolf subspecies have been identified however the actual number of subspecies is still open to discussion. Though once abundant over much of North America and areas of Europe and Asia, the grey wolf inhabits a very small portion of its former range because of the widespread destruction of its habitat. Gray wolves are highly adaptable and have thrived in forests, deserts, mountains, tundra and grasslands. They function as social predators and hunt in packs organized according to strict social hierarchies. It was originally believed that this comparatively high level of social organization was related to hunting success, and while this still may be true to a certain extent, emerging theories suggest that the pack has less to do with hunting and more to do with reproductive success.

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Slavery is a system under which certain persons are totally deprived of personal freedom and compelled to perform labor or services. Although outlawed in nearly all countries, slavery is still practiced in some parts of the world. The evidence for slavery predates written records. It can be found in almost all cultures and continents. Historically, most slaves were captured in wars but some persons were sold into slavery by their parents, or by themselves, as a means of surviving extreme conditions. Ancient Warfare often resulted in slavery for prisoners and their families. Captives were often considered the property of those who captured them and were looked upon as a prize of war. Those captured sometimes differed in ethnicity, nationality, religion, or race from their enslavers, but often were the same as the captors. The dominant group in an area might take captives and turn them into slaves. The possibility always existed of reversals of fortune at the height of the Roman Empire, when powerful nations fought among themselves, anyone could find himself enslaved.

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Hello! My name is Bianca. I am nine years old. I get up at seven thirty in the morning and take a shower. I eat breakfast at eight o’clock. I walk to school with my mother. I start school at eight thirty in the morning. I have many friends at school but my best friends are Lerna, Rena and Talia. We eat lunch together a school at a quarter to twelve and at quarter past twelve we play volleyball together and have so much fun.
After school, I do my homework and watch my favorite cartoon show. I eat dinner with my parents at quarter to six in the afternoon. After we eat dinner together, my parents and I watch a movie and eat popcorn. I go to bed at nine o’clock.

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My friend Josh and Lucas lived near my school. We were good friends and sometimes went to the park in the afternoons. Josh loved to play catch and Lucas and I loved to play hide and seek. Sometimes, Lucas came to my house and we ate pizza and drank orange juice. One-time Josh’s mom baked an apple pie,
and it was delicious!
When school finished, Josh and Lucas traveled to Istanbul, Turkey. They loved Istanbul and its delicious food. They even sailed in a big boat. I did not travel and stayed at home with my family but I had a lot of fun with them. We watched movies, went to the park, learned how to make chocolate cakes with my mom and played lots of video games.

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Danny, Monica and Lucy are three good friends, they like to go to park and to the
library together. One day, Danny, Monica and Lucy went to the library and were
reading books. The library is a quiet place. Lucy was bored and wanted to go to
the park. Danny, Monica and Lucy went to the park and were happy. At the park,
they played, ran and danced together. Lucy was thirsty and Danny and Monica
were hungry. The three friends went home at five o’clock and were tired.

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Let’s meet our new friends Maria, Jeremy and Peter. Maria has short brown hair
and she is nine years old. Maria’s school bag is purple and her shoes are pink.
Jeremy is eight years old and has small eyes and a big head. Jeremy’s school bag is
blue and his pants are blue too. Peter is nine years old and has curly black hair.
Peter has got a basketball, green shorts and a gray shirt. Maria can swim, can
dance and can sing but she can’t ride a bike. Jeremy can climb, can roller-skate,
and can ride a bike but he can’t play the piano. Peter can run fast, can draw, can
do karate but he can’t drive a car.

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