Wednesday, 23 October 2013

What is Matter?

First we reviewed the post from last class to refresh memories about what we did.  Then we talked about what our predictions were before the experiments and reviewed them.  We discussed how each of the experiments worked and went into more detail about pressure.  Water and air to be more specific.
We also discussed the concept of nothing.  A long time ago people did not think "nothing" existed.  Now that we know more about space and other things so we understand it better.  "Nothing" is like a vacuum it has no mass or volume.  300 years ago we did not think that was possible, but now we know it is.
We also discussed the elements.  A long time ago we only thought there were 4, but now we know there are many more ex.
We then discussed how pressure has to do with how our fire and balloon experiment worked.  We learned that when you put the balloon on the mouth of the jar, then light a fire, the pressure inside the jar becomes less because the fire needs fuel.  The balloon the travels from high to low pressure.  Air is very powerful.  Some of the deadliest weapons are powered mostly by air.  Guns use air to propel bullets and nuclear bombs involve air in a big rush to destroy everything.
Next, we previewed our next 2 units which will be air and water.  We then learned about different types of fluids that you might not expect.  Vinegar, water and we tried pouring air which was one of our experiments.  It involves pressure as well.  Density can affect how things are created.  Rock is denser then water so it sinks in water.  Water is denser than air so it sinks in air.  The atmosphere also has different layers because of pressure as well.  Air density changes as you get closer to space so the upper layers of the atmosphere are less dense than the lower layers.
The universe is made of matter and energy so we decided to discuss what is matter?  Matter is something that has volume and mass.  We then completed a fill in the blank about it.
The rest of the class was spent on an experiment with playing thith how matter is measured.  We had a box full of items we were going to measure the mass, volume and density.  We learned that to measure volume you need to take a measurement of water, put your object in, and then find the amount of water that is displaced.  This is the volume.  Then you just do the mass divided by the volume to find the density.  First we estimated what we thought the mass, volume and density would be, then we did the experiment.  We weighed each object, then found the amount of water it displaces for the volume.  The experiment was very fun and we will complete it next class.

Mr Pro. was showing us the "pouring water" experiment and the balloon pressure experiment.
These are some examples of liquids.
These are different densities of natural things on earth.
These were our materials for the experiment.
We used this scale to measure the weight.

This was my finished experiment table.

1 comment:

  1. Kari, you've summarized a lot of the class dialogue but you have some errors. First, nothing or a vacuum have no mass, but they still have volume! Second, CO2 is not an element. It is a compound composed of two elements - carbon and oxygen!
    Give some of the density calculations. Also, include how to use the measuring devices.


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