Sound and Communication
What is sound, and how is it used by humans, animals, and even machines to communicate and send messages. Learn about alarms and sirens, echolocation, and more!
This is 1 of 26 leveled readers in STEM Explorations—a series of informational texts that takes young readers through the worlds of natural science and man-made inventions. Explore weather, seasons, and states of matter. Take trips through time with the advance of computers. Learn how to measure time and temperature, how halves and quarters can be used to share, and how sound and light travel.