Liilii.docx - Competency 7.2 Understanding Written...

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Competency: 7.2 Understanding Written Explanation Text Types A. Read the following article carefully Why Does Hair Turn Gray Have you ever watched someone trying to cover up gray hair by dyeing it? Or maybe you wonder why your granddad has a full head of silver hair when in old pictures it used to be dark brown? Getting gray, silver, or white hair is a natural part of growing older, and here's why. Each hair on our heads is made up of two parts: a shaft — the colored part we see growing out of our heads and a root — the bottom part, which keeps the hair anchored under the scalp. The root of every strand of hair is surrounded by a tube of tissue under the skin that is called the hair follicle . Each hair follicle contains a certain number of pigment cells. These pigment cells constantly make a chemical called melanin that gives the growing shaft of hair its color of brown, blonde, black, red, and anything in between. The dark or light color of someone's hair depends on how much melanin each hair contains. As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows. As people continue to get older, fewer pigment cells will be less to produce melanin. Eventually, the hair will look completely gray. People can get gray hair at any age. Some people go gray at a young age, whereas others may be in their 30s or 40s. How early we get gray hair is determined by our genes. This means that most of us will start having gray hairs around the same age that our parents or grandparents first did. B. Complete the following sentences with the words from the article 1. Hair dye is a substance which is used to 2. When your grandpa was young, his hair 3. Pigment cells are inside 4. If a person has a lot of melanin, their hair color 5. As a person is growing older, pigment cells will C. Answer the following questions 1. Based on the article, briefly explain about our hair. 2. What will happen if pigment cells stop producing melanin? 3. What do people usually do when they discover their hair is turning gray? 4. What makes our hair brown, black, red, or blonde? 5. What is the role of genes for our hair?
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Competency: 7.2 Understanding Written Explanation Text Types Match the words in the left column with their meaning in the right column.
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