<p>天津兩日游??國家海洋博物館+濱?？萍拣^</p> <p>回家繼續(xù)2bu8</p><p>用身體制造各種聲音</p> <p>這個小朋友好喜歡</p> <p>幾個聲音實驗</p><p>Make Music with a Straw Pan Flute</p><p>Perfect for younger children, the following sound waves experiment not only involves creating a fun musical instrument your child could play with, but teaches kids how length can affect the pitch of sound waves. </p><p><br></p><p>Supplies Needed: </p><p>At least 9 or 10 straws, more if desired! </p><p>Scissors </p><p>Clear gift wrap tape</p><p><br></p><p>What to Do: </p><p>1. Take the straws and line them up side-by-side and cut them at an angle at the top. </p><p><br></p><p>2. Tape the straws together to make a pan flute. </p><p><br></p><p>3. Instruct your child to blow through the straws. Which straws make higher and lower pitches? Why? </p><p><br></p><p>Feel free to use more straws and experiment with different lengths to produce different pitches and sounds! Ask your child to explain what happens to the sound the shorter a straw is cut, and create double pan flutes to make harmonies to further explore how length alters the pitch. </p><p><br></p> <p>Experimenting with Sound Waves</p><p><br></p><p>It might be hard to imagine that sound waves can travel through solid objects as well as through the air. This simple but exciting sound waves science activity will demonstrate for your child how sound can and does indeed travel through solid objects!</p><p><br></p><p>Supplies Needed: </p><p><br></p><p>Metal kitchen spoon- a large metal measuring spoon works great! </p><p>At least 30 inches of kite string</p><p><br></p><p>What to Do: </p><p><br></p><p>1. Stretch out the string and tie the handle of the spoon in the middle of the string.</p><p><br></p><p>2. Take one end of the string and tie around your child’s pointer finger. Do the same using the other end, but tie this string around the pointer finger of your child’s opposite hand. </p><p><br></p><p>3. Instruct your child to put his or her fingers, with the string wrapped around each, into their ears. </p><p><br></p><p>4. Help your child lean over so the spoon dangles and help him or her swing the spoon so it hits a nearby door or wall. </p><p><br></p><p>5. Hit the door or wall again, but this time with more force. What does your child hear? </p><p><br></p><p>Your child should hear a bell-like sound travel up the string from the spoon and into their ears. Discuss with your child how the sound waves created from the spoon hitting the door moves through the string until he or she is able to hear it! </p><p><br></p><br> <p>真的可以從繩子那里聽到聲音</p> Listen to Sounds Travel Underwater<br><br>Sound travels well through air, but it travels even better through water! This easy sound experiment for kids can be done in a jiffy out on the back porch.<br><br>Supplies Needed:<br>A bucket filled with water<br>A large plastic water or soda bottle<br>At least 2 kitchen knives<br>Scissors or sharp knife to cut the bottle<br><br>What to Do:<br>1. After filling the bucket with water, take a sharp knife or kitchen shears and help your child cut off the bottom of the plastic water bottle. Be sure that the cap is taken off of the bottle.<br><br>2. Instruct your child to place the bottle in the water so that the cut bottom is in the water. Your child will then put his or her ear to the top of the bottle to listen.<br><br>3. Using the kitchen knives, clang them together to make a sound, but do this in the bucket as your child is listening. What does your child hear?<br><br>Your child has probably noted that the sound of the clanging is loud and clear. Water travels faster through water than in the air, and animals that live underwater are able to hear sound clearly. Discuss the results with your child, to teach him or her more about the conduction of sound waves through water. Balloon Amplifier<br><br>Want to make the world’s easiest amplifier?<br><br>You Need:<br><br> A Balloon<br><br>To Do:<br><br>Blow up a balloon, hold it up, and tap on it. It doesn’t make a super loud sound. Next, hold the balloon up to your child’s ear and lightly tap on it. It sounds pretty loud!<br><br>Why does this happen? When you blow up a balloon you are packing it with air molecules. They are very close together and transmit sound waves super well compared to the air just around us normally.<br><br>When we tapped the balloon while we were just holding it those waves had to move through the less compressed ambient air to get to our ears, and the sound is softer.<br><br>When we hold the balloon up to our ears the sound just has to get through the tightly packed molecules in the balloon and we hear a louder sound. It is amplified. How Do Echos Work?<br><br>How do echoes work? What makes you hear a sound a second and third time like that?<br><br>You Need:<br><br> 2 Paper Towel Tubes<br> Pie Pan<br><br>To Do:<br><br>Prop the pie pan up on a table so it is vertical. Take one paper towel tube and place it on the table, angled a bit but aimed at the pie plate. Take the other paper towel and have it angled the opposite way, also aimed at the pie plate.<br>Mediavine<br><br>Have your child put his ear to one of the tubes while you talk softly into the other. You can hear what is said through the other tube!<br><br>The sound waves you create by speaking travel through the tube. They are directed through the tubes, hit the pie plate, and bounce off, traveling back through the other tube. You are hearing the echo.<br><br>An echo is when a sound wave bounces off of a surface. Some surfaces are better for echoes than others. For example, bathrooms are often very good at creating echoes. This is because they are usually full of hard surfaces like tile that bounce back sound waves effectively. A fun bath time activity is to explore your echo with your child.<br>