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Try the TIMSS Challenge in Science

 

Physical or Chemical Change?

 

1. Sugar dissolves in warm water
Physical Change
Chemical Change

2. A nail rusts.
Physical Change
Chemical Change

3. A glass breaks.
Physical Change
Chemical Change

4. A piece of paper burns.
Physical Change
Chemical Change

5. Iron and sulfur mix and form a partially magnetic black and yellow mixture.
Physical Change
Chemical Change

6. Iron and sulfur are heated and form a non-magnetic shiny grey substance.
Physical Change
Chemical Change

7. Dry Ice (solid carbon dioxide -- CO2) is sublimed at room temperature.
Physical Change
Chemical Change

8. Vinegar reacts when mixed with baking soda.
Physical Change
Chemical Change

9. Water boils at 100 degrees Celsius
Physical Change
Chemical Change

10. Zinc when immersed in Hydrocholoric Acid produces hydrogen gas.
Physical Change
Chemical Change

 

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