Here is a copy of a past national challenge exam that you can use in your general chemistry course as a unit or semester review. Sixty multiple-choice questions query learners on properties of matter, stoichiometry, reactions, and...

For this standardized test practice activity, eighth graders answer 83 multiple-choice and short-answer questions to review their science knowledge.

Read and fill in the blanks of this passage properties and changes. Each blank has a dropdown menu with choices. When you finish, click CHECK MY ANSWERS. If you pick a wrong answer, the right answer will be displayed along with your choice.