Who knew that the machines of the world are all made of just 6 simple machines working together? Introduce your child to simple machines with this worksheet.

Fill in the blanks from the words listed in the word bank, then keep this sheet handy to prepare for tests and quizzes on life science and photosythesis.

Can you identify the difference between inherited and acquired traits?

Mix, boil, and toast your way to understanding energy transformations with this fourth-grade worksheet!