Thursday, 24 October 2013

Scribe Post October 22nd 2013

Today in class we will...
  • use a measuring cylinder to calculate volume of objects

Today in class we learned that...

  • Fluids take the shape of what they are in.  Fluids flow.  Water and air are both fluids.  
  • Fluids exert pressure on objects in them.  Air pressure pushes on everything in the atmosphere.
  • Fluids will move from places of high pressure to places of low pressure.
  • Air can displace water.  Displace means take the place of.  
  • Matter has a variety of properties.  There are different kinds of gases, each with similar and different properties.
  • Density is mass divided by volume (density = mass volume).
  • Objects that are less dense than the fluids they are in will rise.
  • If the temperature of a gas increases in an open container, the gas will becomes less dense and rise.

  • use a measuring cylinder to calculate volume of objects
  • use an electronic scale including the TARE button

Air pressure is keeping this tube filled with water when pulled out of the tank.

This class we became experts on using these tools

Method Volume:
  1. Put about 100 mL of water into the beaker.  Go to your seat with your partner.
  2. Pour about 40 - 60 mL of water into the graduated cylinder.
  3. Record the Volume Start.
  4. Put the object into the measuring cylinder.
  5. Record the Volume Final.
  6. Write down any other observations.
  7. Gently pour out the water and the object into the beaker.
  8. Repeat steps 2 - 7 for all objects.
Method Mass:
  1. Push the TARE button.
  2. Put the object on the scale.
  3. Record the mass when the numbers stop changing.

Here is a finished table of the volumes of different objects.

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