It's time to complete a topic assessment.
Are you ready to test your understanding of the topic: Pure and Impure Substances ?
In this assessment, you'll be asked 25 questions and it should take you roughly 30 minutes to complete.
We'd really recommend you complete this assessment after you've fully completed this topic area to get a really clear picture of your understanding.
This way, you should feel pretty confident in the topic area. But, don't worry if you find some of it challenging!
This assessment is designed to help you improve your understanding and your confidence, so once you've finished you'll be able to see those areas you've really grasped, and those where you could benefit from spending a little more time.
Best of luck!