Light and sound are two of the most important ways to understand the world around us. The sun is Earths main source of energy and light. Light bounces off objects and travels to our eyes. Our eyes and brain work together to translate that light into what we see while our ears pick up sound vibrations and translate them into meaningful messages.
Light and sound are two of the most important ways to understand the world around us. The sun is Earths main source of energy and light. Light bounces...
There are more than six billion humans who all share the same basic structure. Scientists categorize body parts by function. There are many systems such as the cardiovascular system, the respiratory system, the digestive system, the urinary system, and the endocrine system. The body is an amazing machine, and these are just a few of the parts!
There are more than six billion humans who all share the same basic structure. Scientists categorize body parts by function. There are many systems su...
