Sorting of materials into Groups (Questions to be done in Science File)
1. How will you identify materials based on their hardness? Give examples.
2. What are soluble and insoluble materials?
3. Why do you need to classify or group things around you?
4. Differentiate between transparent, translucent and opaque materials.
5. What happens when chalk powder and sand ae added to water? Why?
6. What happens when kerosene oil and cooking oil are added to water? Why?
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