Class content 2009

1. Chemistry

2. We are investigating matter Living is something that is alive OR was once alive OR man made from something that was once alive Is made up of cells How many things can you list that are able to be classified as living? Non-living Something that has never been alive IT can be man made or can exist naturally Is made up of atoms How many things can you list that are able to be classified as non-living?

5. Cant be cut or broken

6. Particles are touching

8. Record your observations Is Flubber a solid or a liquid? Explain your answer

9. Can Matter change states? Predict Make a guess, can matter change state ObserveWatch your experiment and record everything that happens Explain as a class explain what has happened and why. CAN A SOLID CHANGE TO A LIQUID OR A GAS? List of apparatus: Tripod Beaker Gauze Meth burner Watch glass Method: Place tripod over meth burner. Place gauze on tripod and then beaker on the gauze. Put a cube of ice in beaker and place the watch glass on the top. Light meth burner and observe. Record observations. Allow apparatus to cool and return to teachers table.

10. How to draw a diagram……. Diagrams need a title, to be drawn in pencil, needs to be labeled, using a ruler and need to be drawn on the diagram page directly opposite the experiment page you are working on.

11. Water Cycle in a beaker What happened to the ice as we heated it? What appeared on the side of the beaker and the watch glass? What is this process called? Can you give examples of this process in action? Explain what happened to H2O particles in the ice as it changed states. Hypothesise what would happen to the particles in a metal if we were to heat it.

12. Most matter can change states by heating to form gasses and cooling to form solids. Some solids like dry ice( CO2) turn from a solid to a gas with out becoming a liquid. This process is called sublimation.

14. 250mlbeaker

15. Wick cut to length

16. Candle mold

18. Gauze

19. Methburner

20. Spatula

23. Is Oobleck a solution or a mixture? Is Oobleck a solution or a mixture? Explain your answer. Oobleck is a mixture. The corn flour particles are suspended in the water particles. They just hang out together like friends at a party. When Oobleck is moved slowly it acts like a liquid but when it is moved quickly the water particles separate or are ‘pushed away’ from the corn flour particles. Making the corn flour a solid again. The water being pushed away separates the mixture.

24. Physical Vs Chemical A PHYSICAL CHANGE is something that happens to a substance when we play with it. A physical change is special as we can easily see or observe it and when we are finished we can still have the original chemical back. If we have a chemical dissolved in water can we get this back? See the teacher demo to answer this question? Is dissolving a substance a chemical or a physical change? Explain your answer….

25. What is a chemical change? Apparatus 11 small test tubes 1 large test tubes Universal indicators soln 12 soln’s Pipette Method Using a pipette measure 1ml of each soln into each test tube Measure 1.5 mls of universal indicator soln and place the large test tube Add 2 drops of universal indicator to each test tube record the changes Compare with the pH chart and record the results Add a piece of magnesium ribbon to the P3PO4 and a blue soln Observe the results Record your data on a graph either by hand or using xcel Measuring pH Answer these questions: If you had to, how would you group these results into three different groups? Why? Why do you think the metal reacted in the orange solution and not the blue solution? Do you think it would have mattered which orange or blue solution you put the magnesium into. Would you have got the same or similar results? Has there been a chemical change in the testing of pH explain your reasoning.

26. Chemical change Vs Physical change A CHEMICAL CHANGE is something that happens to a substance when we play with it. A chemical change is special as we can only observe it and when we are carrying out experiments Once we have had a chemical change we can no longer get the original substance back, it is now something new. If we mix universal indicator solution with a substance to measure pH can we gat the original substance back? Explain your answer…. If we mix an orange subatance with a bluesubstance we end up with a salt and water. Is this a chemical change or a physical change? Explain your answer. Can you make a generalisation (scientific rule) based on this idea? pH is a chemical property of a substance, this is used to determine its ability to react with other compounds. The orange substances are acids and blue/purple substances are Alkali. When we added the magnesium to the acid it dissolved but did nothing when it was added to the alkali. This is just one example of how acids and alkalis' react.