课件38张PPT。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 singDo you like the song?What can you get?Let’s matchDo they have the same skin colour?Why?Let’s readWhy Are People of Different Colours?1st paragraphWhere 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 paragraphWhere 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 paragraphmelanin
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 paragraphPeople 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 matchNow 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 your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.3rd paragraphWhy 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 your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.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 your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.tanWhy do we have the tan?
Because melanin protects the skin and gives you a tan.
How to prevent tanning?How to prevent tanning?Wear a hat and a pair of sunglasses.
Wear thick clothing.
Use sunscreen.How to prevent tanning?Wear a hat and a pair of sunglasses.
Wear thick clothing.
Use sunscreen.AHow to prevent tanning?Wear a hat and a pair of sunglasses.
Wear thick clothing.
Use sunscreen.CHow to prevent tanning?B
Wear a hat and a pair of sunglasses.
Wear thick clothing.
Use sunscreen.Listen and pointTextbook-page 16Listen and followTextbook-page 16Let’s watchLet’s summarizeWhat we learned todayWhy we have different skin colours.
Respect people of all colours.HomeworkMake a poster-the colours of usLet’s sing课件12张PPT。1st paragraphAll 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.Why Are People of Different Colours?1st paragraphAll 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 paragraphAll 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.2nd paragraphPeople 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.2nd paragraphPeople 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.2nd paragraphPeople 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.2nd paragraphPeople 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.Put a bandage around your finger on a sunny day.Take it off a few days later. Did that part of your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.3rd paragraphPut a bandage around your finger on a sunny day.Take it off a few days later. Did that part of your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.3rd paragraphPut a bandage around your finger on a sunny day.Take it off a few days later. Did that part of your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.3rd paragraphPut a bandage around your finger on a sunny day.Take it off a few days later. Did that part of your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.3rd paragraphPut a bandage around your finger on a sunny day.Take it off a few days later. Did that part of your finger make any melanin? No! The bandage blocked the sun from the skin. When sunlight hits your skin, melanin comes to protect it, and gives you a tan.3rd paragraph
