earth and space science
Geologic Time Scale 5E Lesson Plan ready to print and teach the entire Earth Science unit. Includes word wall of vocabulary, interactive science notebook template, presentation and note worksheet, and student choice final project. Complete station lab activity is also included where students will read, research, watch, explore, illustrate, organize, write, and be assessed. Grades 5th 6th 7th 8th 9th
Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves. NOAA scientists primarily use sonar to develop nautical charts, locate underwater hazards to navigation, search for and map objects on the sea floor such as shipwrecks, and map the sea floor itself. There are two types of sonar—active and passive.