1. 5.5 In a state 06 January 2011 Draw round the5 words in the grid to do with changing state. Words can only go down or left to right.
2. Aims Recall what is meant by a change of state. [Level 4] Interpret a graph showing the changes of state. [Level 5] Explain changes in state in terms of the particle model. [Level 6] Describe how the particle model is used to explain what is happening when matter melts. [Level 7]
5. All good things come to an end As the air heats up, the snow begins to melt To understand this we must understand the particle model we learnt last year…
13. Why do things changes state? When particles are heated they gain energy and move MORE When the particles change state the energy goes into breaking apart bonds NOT movement Movement is the same as temperature so the temperature stays the same during melting, for example
15. Plasma Plasma is an electrically charged gas at high temperature It is called the fourth state of matter because it has different properties to a gas It was first seen in 1879 by Sir William Crookes and he called it ‘radiant matter’ Sir JJ Thomson figured out what it was in 1897 and it was named in 1928 by Irving Langmuir
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17. to power supply immersion heater thermometer beaker crushed ice
18. 5.5 In a stateQuestions (Level 4) Copy and complete the sentences using the words below: vibrate volume particles energy Heat is a form of _________. The more energy an object has, the more the particles of the object _________. A smaller _________ of water will heat up more quickly than a larger one. This is because the energy is shared between fewer _________. What do scientists say happens when a solid turns into a liquid? (Level 4) 1 of 3
19. 5.5 In a stateQuestions (Level 5) Look at Ryan’s experiment on page 78 with melting ice cubes. What could Ryan do to improve the experiment? Sketch a graph of steam being turned into solid ice. On each section of the graph, label what is happening. Use the idea of particle theory to explain why a gas can spread out to fill its container? When a liquid turns into a solid, its temperature stays the same. What do you think is happening to the particles? (Level 6) (Level 7) (Level 8) 2 of 3
20. 5.5 In a stateQuestions (Level 8) When a material is changing from a liquid to a gas, what is happening to the temperature and the heat of the material? 3 of 3
![Aims Recall what is meant by a change of state. [Level 4] Interpret a graph showing the changes of state. [Level 5] Explain changes in state in terms of the particle model. [Level 6] Describe how the particle model is used to explain what is happening when matter melts. [Level 7]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)