Science EL 5 Term 1 WS Change of State

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    English
  1. Science
  2. 5 Grade
  3. By Elsa Novia Barata
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Name : Date : Score : Class : In this exercise, you will use information in a table to compare the melting points of different metals. Metal Melting Point in °C Gold 1064 Silver 962 Aluminium 660 Copper 1083 1. What is a melting point? 2. List the metals in the order of highest melting point to the lowest melting point 3. Complete the following phase change: Gold (_________________ phase) heat gold (_______________ phase) °C Exercise 3 Page 2

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Name : Date : Score : Class : 1. We can use _________________ with a data logger to observe how temperature of water changes as it is heated. 2. When liquid water gains heat, it temperature ____________. 3. When liquid temperature reaches 100 °C, liquid water changes into _____________. 4. The change of liquid into gas at its boiling point is called ____________ 5. The boiling point of water in ____________ 6. When solid ice temperature reaches 0°C, ice changes into ___________________ 7. The change of solid to liquid is called _____________________ 8. As ice melts, its temperature remains the same at __________________ 9. What changes in state take place at the following temperature when water gains heat? (i) 0°C _______________________________________ (ii)100°C _______________________________________ 10. Tina filled half a pot with water to boil. (a) She saw many bubbles in the water while it was boiling. She said these bubbles were made up of air. Was she right? Explain your answer. (b) When Tina stopped heating the boiling water, the pot was less than half full. Explain what happened. Exercise 4 Page 3

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Name : Date : Score : Class : Study the graph. Discuss the following in pairs. 1. What was the temperature of the water before it was heated? 2. Which part of the graph, QR or RS, shows when the temperature of the water was rising? 3. Which part of the graph, QR or RS, show when the temperature of the water remained the same as it was heated? What was this temperature? Page 4

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Name : Date : Score : Class : 4. What was happening to the water from R to S in the graph? End of Paper Page 5

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