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صفحه اصلی تبیان شبکه اجتماعی مشاوره آموزش فیلم صوت تصاویر حوزه کتابخانه دانلود وبلاگ فروشگاه اینترنتی
    • Crushing Cold
    • Use warm water to rinse out a plastic jug. While the air in the jug is still warm, put the cap on tightly and place the jug into a ...
    • Change the flow
    • Clean a pencil with soap and water, then hold it almost straight up and down over a sink or jar. Pour a thin stream of water from a glass or pitcher onto the side of the pencil. The water will ...
    • Static Magic
    • Blow up a balloon and rub it against your head to make your hair stand on end. 2. Tie a second balloon to the end of a long piece of thread. Tape the other end of the thread to the center of a doorway, so the balloon hangs down. Rub the first balloon ...
    • Water Beats Gravity
    • Fill a glass with water. Use a rubber band to hold a handkerchief or bandanna tightly over the top. Over a sink, quickly turn the glass upside down. The water should stay in the glass.Use a finger to ...
    • Kitchen Mystery … Solved!
    • What happens inside biscuits and cookies as they bake? They go into the oven as thick dough. Then baking soda or baking powder makes them inflate: tiny pockets of ...
    • Cool to the Touch
    • Lay a metal tray and a wooden cutting board next to each other on a table. Leave them in place for at least 30 minutes so that they both ...
    • Iron Burns …Slowly
    • Sometimes a big load of iron in a ship can get hot. The heat can even set other materials on fire. That’s because the iron is rusting, which means it is burning very, very slowly. Iron rusts in a chemical reaction called ...
    • Ice cube Glue
    • Over a plate, press the flat sides of two ice cubes together. Slowly count to 30, then let go of one ice cube. Why do they stick together? ...
    • Mystery Fog
    • With the help from an adult, put hot tap water into a glass. Put ice water into another glass. Why does fog form on different parts of the two glasses? ...
    • How to Be Safe in Ice and Snow (Part 2)
    • Sometimes if youre out having fun, its easy to forget to pay attention to your body. But if your body temperature drops even 4 or 5 degrees while youre outside, it can make you feel crummy. Thats why you need to be ...
    • How to Be Safe in Ice and Snow (Part 1)
    • Your dream finally came true . . . it was announced on the radio and on TV . . . its a snow day! Schools closed for the whole day, and that means its time for one thing: going outside to have fun in the snow. Or maybe ...
    • Which way will they go?
    • Use string to hang two apples or balloons at the same height and about one inch apart. Blow through the space between them. What happens? ...
    • Pepper Pick Up
    • Sprinkle some salt and ground pepper onto a plate. Blow up a balloon and rub it against your dry hair. Now slowly bring the ...
    • Paper Engineering
    • Lay a sheet of notebook paper across two books, and load coins onto the paper. The paper sags. Now bend and ...
    • Mixing Oil and Water
    • Some things just dont get along well with each other. Take oil and water as an example, you can mix them together and shake as hard as you like but ...
    • Into Thin Air
    • Set a glass and a large plate side by side on a counter. Pour ¼ cup of water into the glass and ...
    • Staying Warm
    • Do you know how Arctic seals, walruses, and sea lions can live in icy waters? Try this to find out. Coat one of your fingers with ...
    • Spinning in the Wind
    • One basic idea makes pinwheels and windmills work: the turbine. Heres how to make a simple one. With scissors, cut a square out of ...
    • Mysterious Colours
    • Pour a tablespoon of vegetable oil into a mug. Add two drops each of red and blue food colouring. Stir until the food colouring breaks up into tiny drops. Pour the mixture into ...
    • Make a Pinhole Camera
    • How does a camera change a big scene into a small picture? To see for yourself, make a pinhole camera. Start with ...
    • Nightmares are not real and can’t hurt you (Part 1)
    • Ben is in the middle of a wonderful dream. He’s riding the ocean waves with his family when — BAM! — Along comes a giant sea creature poised for attack. Ben thrashes in bed, trying to fight off the monster. When he calls out, his ...
    • Test anxiety and tips to ease it (Part 2)
    • Well, because we can’t outlaw tests, we might as well figure out how to ease test anxiety. Anxiety is a feeling a person gets when he or she expects something stressful to happen. When you’re under stress, your body ...
    • Test anxiety and tips to ease it (Part 1)
    • Today’s the day of a big test at school, and you feel awful. Your stomach hurts and you have a headache. Maybe your muscles feel tense and you feel shaky or sweaty. You know you ...
    • Wow, I’m really stressed out (Part 2)
    • If you’re feeling tired and stressed because you have too much going on, like lots of after-school activities, you might feel better if you drop something, even if it’s just for a semester or so. Sometimes ...
    • Wow, I’m really stressed out (Part 1)
    • Have you ever felt sick to your stomach during a test? Have you had days when you were so loaded down with homework that you had trouble sleeping? Have you ever been so worried about something that you ended up with a terrible headache? If so, then you ..
    • What Sleep Is and Why All Kids Need It (Part 1)
    • Time to get ready for bed! someone calls from the other room. Oh, no! You’re really into the great book you’re reading or that computer game that you’re winning.Why do I have to go to bed? you ask. Sleep is ...
    • A Cupful of Compass
    • Here’s an easy way to make a magnetic compass. The only things you need that may not be in your kitchen are ...
    • Ready, Set, Breakfast!
    • Eat your breakfast. It’s the most important meal of the day! Why are parents always saying that? Well, imagine you’re a ...
    • Do Eggs Float?
    • In water, is an egg more like a boat or a rock? The answer depends on what’s in the water. Try this experiment to see for yourself. And do it near the ...
    • Feeling Too Tall or Too Short (Part 2)
    • You might want to know how tall you will be. Will you be nose to nose with your mom or dad someday? There’s no way to know for sure how tall a kid will be as an adult, but it’s easy to ...
    • Feeling Too Tall or Too Short (Part 1)
    • Line up shortest to tallest! the teacher calls out. Not again, some kids might groan — especially if they have to stand at one end or the other. For most kids, height isn’t something they ...
    • Ice Cube on a Wire
    • For this activity you need a thin strong wire about two feet long. You can find a good one by carefully unraveling a ...
    • Mitral Valve Prolapse (Part 2)
    • Most kids who learn they have MVP find out about it during a regular checkup. The doctor may be listening to the kids heart and hear a ...
    • Taking Charge of Anger (Part 2)
    • When someone you know is angry, he or she may stomp away or stop talking to you, or become quiet and withdrawn. Some people scream ...
    • Taking Charge of Anger (Part 1)
    • Have you ever lost your temper? Did you yell and scream or want to hit someone? Maybe your little brother got into your room and played with your toys without permission. Or ...
    • Computers Can Be a Real Pain
    • If youre like a lot of kids, you probably spend time sitting at the computer, doing schoolwork or playing games. But whether youre writing a report about ...
    • Talking About Your Feelings
    • Sometimes the toughest thing about feelings is sharing them with others. Sharing your feelings helps you when your feelings are good and when they arent so good. Sharing also ...
    • Getting Along With Brothers and Sisters
    • In a house with more than one kid, there are bound to be some problems. Brothers and sisters borrow stuff, and dont always return it in top condition. Younger kids sometimes ...
    • Getting Along With Parents
    • Mom and dad — theyre two of the most important people in your life. You probably see at least one of them every day and, over your ...
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