Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

Is orange juice a solid or liquid? What about a cookie? Practice classifying everyday objects in this first- and second-grade states of matter worksheet!

Can melted wax turn back into solid wax? Can scrambled eggs turn back into raw eggs? Learn the answers to these questions and more with this second-grade worksheet about reversible and irreversible changes!

Learn about the texture and hardness of different objects in this second-grade worksheet!

Why do some objects make loud sounds when dropped, while others make quiet sounds?