How do different light sources affect the size and shape- of shadows? Quintin Question wonders how shadows can be all different shapes and sizes. How are sounds made? Sounds are made when objects ...

Introduction Did you know that not all animals use their ears to hear sounds? Snakes, for example, perceive sound waves through their jawbones! And many insects perceive sound waves through their ...

Learn how sound travels through solids, liquids and gases and how people and animals use sound to communicate. How are sounds made? Sounds are made when objects vibrate. The vibrations enter your ear ...