Up to now, science class participation has mostly been listening and looking. In third grade, science gets very hands-on, and your child may discover he or she is all about experimenting.
Third graders will conduct simple experiments independently and in groups, and will participate in teacher-guided complex ones. Less hands-on but nearly as exciting, your child will be exploring in some deep space, geology, climate, life cycles of plants and animals, and other topics that can open young minds to the incredible workings of the world around them.
Space, in particular, can become quite a focus. Around this age, lots of kids decide to become astronauts when they grow up, and space-related matters might be a science-project topic of choice. You might even start hearing about Space Camp (yes, it's a real thing!), which your child is nearly old enough to attend. (See How Space Camp Works to learn about it.)
And then there are the less hands-on, but just as mind-boggling, third-grade developments ...