Science Quiz Living and Non-living Things For Kids for 1st, 2nd, 3rd, grade. What is a living thing? This question is intriguing to children though it may seem obvious to adults. In this quiz students will learn to distinguish between living things and their characteristics like being able to breathe, reproduce, eat move and nonliving things that do not possess these characteristics. After taking this interactive test, students will be able to differentiate between living and non-living things. This quiz is suitable for 1st, 2nd and 3rd grade kids.