In your previous studies, you may have learned about matter (for example solids, liquids and gases) and its properties.
During this lesson, you will learn about what matter is made up of and how scientists from different places throughout history contributed to our understanding of matter.
Before you start reading, you will read through the objectives of this lesson and write down four sentences about what you already know and/or what you would like to find out about this topic. This warm-up activity is meant to activate your previous understanding and help you monitor your own learning.