六年级下册英语课件-UNIT TWO CAN YOU TELL ME MORE ABOUT HER（4）（38张ppt） 北京版

UNIT TWO CAN YOU TELL ME MORE ABOUT HER?(4) 英语 六年级下册 （北京出版社） Learning Objectives Read a passage about skin colours to know why we have different skin colours. Let’s sing Do you like the song? What can you get? Let’s match Do they have the same skin colour? Why? Let’s read Why Are People of Different Colours? 1st paragraph Where do all skin colours come from? All skin colours come from melanin. Our body makes melanin to protect our skin from the sun. People with more melanin are darker and those with less are lighter. 1st paragraph Where do all skin colours come from? All skin colours come from melanin. Our body makes melanin to protect our skin from the sun. People with more melanin are darker and those with less are lighter. 1st paragraph melanin Melanin is a dark substance in the skin, eyes, and hair of people and animals, which gives them colour and can protect them against strong sunlight. 黑色素是人和动物皮肤、眼睛和头发中的一 种黑色物质，它使人和动物有颜色，并能保 护它们免受强烈的阳光照射。 2nd paragraph People in hot areas developed more melanin because dark skin helped protect against the sun and skin cancer. In colder countries, people developed lighter skin because they did not face the same kind of pressure to protect themselves from the sun. If your parents came from sunny places, you were born with more melanin and darker skin. If your parents came from less sunny places, you were born with less melanin and lighter skin. True or false ( T) 1. Darker-skinned people have more melanin than lighter skinned people. ( T) 2. Dark skin can help protect against the sun and skin cancer. ( T) 3. If you were born in a hot and sunny place, you would have darker skin. ( F) 4. Our body can produce melanin without sunlight. Let's match Now we know... Darker-skinned people have more melanin than lighter skinned people because they get more sunlight. 赤道 Why does the finger have different colours? bandage Put a bandage around your finger on a sunny day.Take it off a few days later. Did that part of