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# Cba#1 review

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This is the first Science CBA review

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### Cba#1 review

2. 2. How to read a graduated cylinder<br />Your eye should be level with the top of the liquid<br />You should read to the bottom of the MENISCUS<br />
3. 3. How to read a triple beam balance<br />Go here:<br />http://www.schooltube.com/video/21063/Triple-Beam-Balance<br />Make sure you read all the numbers and add them up.<br />
4. 4. Please be safe<br />If you have samples of an unlabeled substance, please…..FOR CRYING OUT LOUD- Ask the teacher for labeled samples before messing with it.<br />Always wear appropriate safety gear during labs: goggles, gloves, etc.<br />Always follow directions in a lab. Don’t do anything unless you have been instructed to do so.<br />
5. 5. Communicate a valid Conclusion<br />10 sixth graders are stuck in a room together for an hour. In the room there is some broccoli, some spinach, and some cupcakes. All 10 students are very hungry. After an hour, the students are covered in icing, and there are crumbs everywhere. The broccoli and spinach were untouched. What conclusions can you draw from this?<br />
6. 6. What is Matter?<br />Matter is anything that has mass and takes up space. UH, DUH!<br />
7. 7. Properties of Matter<br />Physical Properties:<br />Weight- Gravitational pull on an object<br />Mass- The amount of matter in an object<br />Volume- The amount of space an object takes up.<br />Density- the amount of matter you can cram into a given space.<br />Chemical Properties:<br />Flammability- Will it burn or not?<br />Corrosiveness- Will it rust or react with oxygen?<br />
8. 8. Physical Change-you can get it back<br />A physical change occurs when the substance changes state but does not change its chemical composition. For example: water freezing into ice, cutting a piece of wood into smaller pieces, etc. The form or appearance has changed, but the properties of that substance are the same (i.e. it has the same melting point, boiling point, chemical composition, etc.)<br />
9. 9. Chemical change-you can’t get it back<br />A chemical change occurs when a substance changes into something new. This occurs due to heating, chemical reaction, etc. You can tell a chemical change has occurred if the density, melting point or freezing point of the original substance changes. Many common signs of a chemical change can be seen (bubbles forming, mass changed, etc). <br />
10. 10. What is Energy<br />Energy is the ability to get up out of bed in the morning and come to school……. Not really…..but kind of……..Energy is the ability to do work<br />
11. 11. Types of Energy<br />Non Renewable-These energies cannot be replaced in a short period of time<br /><ul><li>Fossil Fuels- coal, oil, and natural gas
12. 12. Nuclear Energy- Use the energy stored in atoms</li></ul>Renewable – These energies can be replaced in a short period of time<br /><ul><li>Solar-Heat from the sun
13. 13. Wind- Harness the movement of the wind
14. 14. Hydroelectric- Harness the movement of water
15. 15. Geothermal- Use the heat from the Earth’s core
16. 16. Biomass- Use the energy stored in living things</li></li></ul><li>Fossil Fuel Powerplant<br />Coal is the main energy source used to create electricity. It is transformed from Chemical energy to thermal energy. The heat boils water and creates steam. The steam spins a turbine which creates electricity<br />
17. 17. Nuclear powerplant<br />Atoms of Uranium are split. Some of the Uranium’s mass is converted to thermal energy. The thermal energy heats water to steam. The steam spins a turbine….yada-yada-yada<br />
18. 18. Hydroelectric power<br />The energy from the movement of water is harnessed. The water pressure spins a turbine…..and you know the rest<br />
19. 19. Wind Energy<br />The movement of wind is harnessed to create electricity. The wind spins a wheel and the movement creates electricity.<br />
20. 20. Biomass<br />Using the energy stored in living things.<br />
21. 21. Geothermal energy<br />Using the heat from the Earth’s core to create electricity- The heat is used to convert water to steam….steams spins the turbine and you know the rest.<br />
22. 22. Energy Transformations<br />Check this out<br />http://www.schooltube.com/video/37581/Energy-Conversions<br />