Where Does Space Begin?

What is the size of Earth’s atmosphere? Where does space begin? Many students struggle to answer this question. This activity aims to help them estimate the relative size of the atmosphere and explore different concepts regarding the beginning of space.
Generations of students have grown accustomed to watching space vehicle launches and astronauts exiting spacecraft for maintenance work in space. Despite this, many are unsure when objects are actually in space. This activity is designed to help them understand where space begins.
It’s important to note that scientists, engineers, and various space experts have differing opinions on this matter. This disagreement can be discussed with the students. Not everything is as neatly arranged as textbooks sometimes suggest.