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IS IT ALIVE?. By: Jody Anderson, Camille Groh, and Hailey Napier. Does it Have Cells?. Procedure/Tools. We took a sample and made a wet mount with it. We then investigated the sample under a microscope. Observations/Results.

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IS IT ALIVE?

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IS IT ALIVE?

By: Jody Anderson, Camille Groh, and Hailey Napier


Does it Have Cells?


Procedure/Tools

We took a sample and made a wet mount with it.

We then investigated the sample under a microscope.


Observations/Results

There were no cells. Cells have a cell wall, a nucleus, and many other parts. We saw none of those.

The background of the slide is a picture of what we saw.

Although there wasn’t much to see, we noticed that our sample dissolved into the water of the wet mount.


Does it Respond to Different Environments?


Procedure/Tools

We created multiple environments with a sample in each.

We proceeded to closely observe each sample.

Tools: microscope, soil, saltwater, freshwater, sugar, and plastic cups.

These were our environments:


Soil


Fresh Water (sugar added)


Salt Water (sugar added)


Control


Why we used the aforementioned environments.

We used soil in case it was seeds, we used fresh water in case it was eggs of freshwater organisms, and we used salt in case it was the eggs of saltwater organisms.


Observations/Results

We observed no change in either the controlled environment or the soil environment (except when our sample dissolved into the water of the wet mount

The sample was not visible in the salt and fresh water environments

We assumed the disappearance was due to our samples’ tendency to dissolve in water


Salt

We were able to back up our conclusion that our sample was non-living with some extra information

We made the assumption our “unknown” was salt

Did a little research

And…


Salt Under a Microscope

  • Our “Unknown” Under a Microscope


Does it grow?


Procedure/Tools

We observed samples of our unknown under the microscope each day to determine if they had grown.

Tools: Microscope, slide, coverslip.


Observations/Results

In both the salt and the fresh water on the second day the unknown had completely disappeared In the soil and control it remained the same size. On the last day, the salt water with our unknown had dried slightly and formed some salt crystals.

We concluded that the unknown had not grown at all.


Does it produce waste?


Procedure/Tools

To test whether the organism produced waste, we decided to use Bromothymol Blue. However, since we detected no growth, cells, or changes to the environment, we decided there was little need for this test.


Tools

Apart from a microscope, we had to learn how to use a slide and a cover-slip to make a wet mount. We also had to learn how to use pipettes, to sample some of our liquid with our unknown for a wet mount.


Alive or not?

We are positive our organism is not alive. It has no cells, does not grow, and does not respond to different environments. Furthermore, it is salt.

We learned the definition of life, and we tested the characteristics of life to determine that our unknown was not alive.


Unanswered Questions

We really answered all of our questions. Some interesting things to know would be: why salt dissolves in water, If this salt is pure Sodium Chloride, why it leaves behind air bubbles when it dissolves, and why salt crystals are cubic.


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