Monday, 26 August 2013

Labels,Qualitative Observations and Electrical Conductors




The first thing we did today in class was talk about scribe posts and the labels needed in the post.
We also talked about qualitative observations, and we learned that these observation don't contain numbers.
Some examples of  qualitative observations from the chip/puffed biscuit experiment:
  • Chip/puffed biscuit became totally black after burning.
  • Most of biscuit became black and fell apart. 
  • Thermometer temperature kept rising even after the flame was out.

For the rest of the class time, we did an experiment to test what materials can/can't electricity flow through. 


In this picture,  Leo, Alex and Alexandre used a magnet bar, and the energy was raised up to more than 3.





Here are the results of today's investigation:

Ivestigation results made by Leo Von Mutios
Material
Conducts (C) or Insulates (I)
Reading on the Ammeter
/ A
Qualitative (describe observations using words and NOT numbers)
pen
I
0
plastic
pencil
I
0
Wood, rubber, graphite
motor
C
.07 - .1
On some parts, specifically the sides, Ammeter readings were higher than  on other sections. Motor buzzed when connected correctly.
pyrite
C
.1- 0.4
Ammeter readings rose and fell, depending on how close the pyrite was to the metal and its position in relation to the latter.
graphite
C
.8 - 1.2
Ammeter readings somewhat steady around 1, and did not go up or down by much when in different positions.
quartz
I
0
Mostly white, stone
bar magnet
C
2.8 - 3+
With the bar's side on the on the center of the metal, Ammeter readings were steady at 3+. At other locations, readings were either 3 or slightly below.
wire with copper exposed
C
3+
At the slightest touch of the metal, Ammeter indicator skyrocketed to 3+. Readings were constantly at the maximum, not changing even when we moved the copper around.
wire completely insulated
I
0
Rubber, copper (concealed/covered by rubber)
rubber hose
I
0
Rubber, transparent, malleable/flexible
rusty nail
C or I
1 - 3
When with the iron near the head touching the metal, readings were constantly at 3+. However, in other positions, readings went up and down between 1 and 2.
paper clip
C
> 3
the terminals heat up a little

Skills Learned/Used

  • How to work in groups
  • How to use the ammeter
  • How to use alligator clips
  • How to measure electricity flow
  • How to write qualitative observations
  • How to use labels in the blog


1 comment:

  1. Describe how to do the skills you listed above.

    ReplyDelete

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