Science can be a boring subject for some youngsters. The following activities and experiments will combine hands on fun and scientific investigation into truly memorable experiences! Anyone can easily follow the instructions detailed below and enhance learning in new ways.
Perform a show for your friends, using light and shadows. On a large sheet of white paper, use black paint to make some tree trunks and leaves along the sides and top of the paper. Leave the middle open. Set aside to dry. On a piece of cardboard, draw an animal such as a crocodile or hippo. Cut out along lines and tape the body shape onto a sturdy straw. Use masking tape to attach your white paper between two chairs, with the painted side facing the front. Darken the room and put a lamp behind the chairs. Switch the lamp on and shine it on the screen. Sit behind the chairs and the screen. Hold the puppet by the straw, so that it’s almost touching the paper. move the puppet to make it perform. the audience will see the puppet’s shadow on the screen. Light from the lamp passes through the unpainted areas of the screen, but the puppet blocks the light casting a shadow onto the screen.
Cooking in the Sun
Choose a sunny day to discover how you can trap the Sun’s heat. Line a large bowl with kitchen foil. Then press a piece of sticky tack down in the middle of the bowl. Put a marshmallow on the end of a toothpick. Push the other end of the toothpick into the poster tack. Cover the top of the bowl with clear food wrap. Then put the bowl outside in a sunny place. Use stones to prop up the bowl. Position it so that the inside is facing the sun. Leave it for about 15 minutes. The marshmallow should start to melt. If it hasn’t, leave it for another 15 minutes and check again. be careful–the marshmallow may get vary hot. The food wrap lets sunlight into the bowl and traps heat from the sun. The foil reflects the light and heat around the bowl and onto the marshmallow. This heats it up. Because the air in the bowl is trapped, it gets even hotter, which also speeds up the cooking.
Try this to find out how sound vibrations work. Cut a piece of thread as long as your arm. Tie the midle to the end of a fork. Wind the ends around your fingers, but not too tightly; it could restrict your blood supply. Swing the fork so that it knocks gently against the edge of a table. You will hear a dull clink. Now touch your index fingers to the flaps just in front of your ear holes and let the fork hang down. Swin the fork so that it knocks gently against the table again. What do you hear this time? When the fork hits the table, it vibrates. This makes the air around it vibrate too. When you put your fingers near your ears, you bring the thread closer to the sound sensors in your ears. You can hear the vibrations much more clearly. They now make a clear chiming sound in your ear.
Investigate the incredible effects of static electricity in this activity. Find a shallow, plastic box and sprinkle a thin layer of ground pepper across the bottom of it. Put on the lid. Rub the lid for about 30 seconds with a woollen scarf or sweater. Stop rubbing the lid and watch. Specks of pepper will jump up and stick to the lid. You should see and hear them hitting the top. Unfold a metal paperclip and touch the lid with one end of it. The pepper will move sideways or drop down. Rubbing the lid creates a build-up of static electricity, which attracts the pepper. When you touch the lid with the paperclip, the static is transferred to the metal. So the pepper drops down, or is pulled to other parts of the lid that still have static. The static travels through the metal paperclip, then your body and down to the earth. So the paperclip doesn’t get a build-up of its own.
Mix vinegar and milk and get some surprising results. Fill a jar halfway with milk, then pour it into a saucepan. Gently warm the milk on the stove, but don’t let it boil. Turn off the heat. Add a drop of food dye and two tablespoons of vinegar. Stir the milk until lumps form. Cut a foot off a pair of panty hose. Put the toe inside the jar and fold the top over the sides, to make a strainer. Pour the milk into the strainer and leave it for ten minutes. Squeeze out the rest of the milk into the jar. Scoop the lumps out of the strainer and squeeze them into one lump. Press the lump into a cookie cutter. Remove the cutter. Leave the shape on some paper. It will take a couple of days for it to dry. Milk contains chains of molecules known as casein, which are normally curled up an dissolved. When you add vinegar, the molecules curl into a different shape and form solid plastic lumps instead.