1 1. Matter and its properties Matter is ever ything that occupies space and has mass. The bench you sit on , the book you read and your body are all matter. Wood , water and air are also matter. When matter forms objects with defined boundaries ( like a bench), it is called a body. When matter has no defined boundaries ( like air), it is called a material system. Some materials can be used to make bodies. For example, wood can be used to make a bench . Other materials cannot be used to make objects with defined boundaries and they must be placed in a container. For example, the air in a ball . 2 Should packaging for food have the same properties as packaging for toys or stickers? Why? 3 What properties could packaging have to make it easier to recycle? Detect air Some material systems, such as air, are difficult to detect. Look at this experiment. 1. Put some water in a glass and mark the water level. 2. Turn a smaller empty glass upside down and place it inside. Hold the glass and when it reaches the bottom, mark the water level. 3. Without taking the glass out of the water, tilt it to release the bubbles. 4. After all the bubbles have been released, mark the water level. 4 How do you know there was air in the glass? 5 Is it possible to know how much air there was? Write the answer in your notebook. 6 Which ones are matter? a) Pencil b) Music c) MP3 file d) Carbon dioxide e) Writing f ) Cat g) Light h) Sand i ) Cotton 7 Classify these terms as bodies or material systems: a) Book b) Phone c) Aluminium d) Juice e) Air f ) Atmosphere g) Bottle of water h) Bird i ) Moon A C T I V I T I E S Conclusions CHALLENGE 11
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