1 / 23

Test Review

Test Review. Copy everything into your notes!! If you made a 100, you may read a book until we finish!. Matter…. Matter is ANY substance that has a MASS and takes up SPACE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!. How would you determine the mass?. Mass is determined using the TRIPLE BEAM BALANCE.

fell
Download Presentation

Test Review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Test Review Copy everything into your notes!! If you made a 100, you may read a book until we finish!

  2. Matter… • Matter is ANY substance that has a MASS and takes up SPACE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  3. How would you determine the mass? • Mass is determined using the TRIPLE BEAM BALANCE. • Graduated cylinder is used to determine the volume of a liquid.

  4. Which two physical properties does all matter have in common? • All matter must have a MASS AND TAKE UP SPACE. Volume is SPACE.

  5. Volume of a liquid… • Graduated cylinders are used to measure the volume of a liquid. • Graduated cylinders are labeled in mL (milliliters). • mL is a derivative of LITERS!

  6. Units for density… • Density is the mass/volume. • Mass units are grams. • Volume is mL or cm3. • Therefore, the units for density is g/mLor g/ cm3.

  7. 3 states of matter.. • Solid • Liquid • Gas

  8. Making sheets of metal… • If you are making sheets of metal, you need to make sure that the metal can be made FLAT. • Ductility – stretch into a wire • Luster – shiny • Malleability – hammer into a thin sheet • Boiling point – the temperature when a liquid begins to turn into a gas

  9. Coolants for motors.. • Coolants keep the motor “cool”. • If a liquid keeps a metal cool, then it must be able to absorb A LOT OF HEAT before it boils. • Specific heat – how much heat an object can hold before it starts to heat up. • Boiling point – the temperature when a substance turns from a liquid to a gas.

  10. Why is copper used for electrical wiring… • Conductivity – it allows electricity to flow through it. • Ductility – it is able to stretch into a thin wire.

  11. Solve for density. • D = m/v • D = 5g/20mL • D = 0.25 g/mL

  12. Polarity.. • “like dissolves like” • Polar dissolves polar • Salt is polar. • Water is polar. • Oil and alcohol are nonpolar. • Salt will dissolve in water! • Oil doesn’t dissolve in water because it is NONPOLAR AND WATER IS POLAR.

  13. Sand vs. water… • It takes a small amount of heat to make sand “hot”. • It takes a large amount of heat to make water “hot”. • Sand = low specific heat. • Water = high specific heat.

  14. Water’s density is 1.0g/mL • If something floats, it must be less dense than whatever substance it is floating oil. • Object A = 0.81g/mL. This is the only answer choice that is less than 1.0g/mL.

  15. #16… • The answer is corrosiveness.

  16. #17… • The answer is solubility. • Remember, if I dissolve anything in water, all I have to do to get it back is LET THE WATER EVAPORATE!

  17. Melting ice.. • Ice = H2O • Water = H2O • I have not changed the identity of the substance. • I have changed the PHASE of matter of the substance from a solid to a liquid. • This is a PHYSICAL CHANGE.

  18. Physical changes… • They do NOT CHANGE the identity… • Tear paper – it’s still paper…just a different shape • Dissolve sugar in water – get it back by letting the water evaporate • Mixing sugar in salt – no reaction… • Chemical – REMOVING TARNISH FROM A PENNY WITH LEMON JUICE!

  19. 5 INDICATORS OF A CHEMICAL REACTION • Forms a precipitate.. • Heat is evolved.. • BUBBLES or a gas is produced… • Light is produced… • A change in color…

  20. Cornflakes… • If I put an amount of cornflakes in a bag and get the mass it will equal some number… • If I DON’T ADD OR REMOVE any from the bag and only crush them up, it will equal the same mass!!!

  21. Alka-Seltzer • An alka-seltzer reacts with water.. • How do we know? • Look for the indicators.. • It produces GAS!

  22. How would you recover salt from salt water? • LET THE WATER DISSOLVE!

  23. Water… • No matter how much water you have, it will ALWAYS begin to freeze at 0C and boil at 100C. • The opposite of freezing is melting. If water melts at 0C, then it will freeze at 0C!

More Related