Apologia General Science Experiment 12.3 Body Temperature

Apologia General Science 

Experiment 12.3 Body Temperature

Our first step was to take Dd's temperature, then go outside and soak up some major heat and re-take her temperature.  

We used the "Tempa Dot" and our normal thermometer to take her temperature.

After being outside, in the intense heat for 15-20 minutes, her temperature went up one degree.

Then we went to our very chilly basement, and Dd laid on the cold concrete floor.  After 15-20 minutes chilling we took her temperature again.  Her temp dropped down a degree.

Purpose:
Because we are ENDOTHERMIC, our internal temperatures don't rise or fall too much, but stay relatively the same temperature.  We use our energy to regulate our body's temperature.  This quality is unique to us mammals, but many other creatures are ECTOTHERMIC--- they are cold-blooded and their temperature does get effected by the outside temperatures.

Ectothermic organisms require less food than endothermic organisms.  We mammals require a lot of calories to maintain our stable internal temperatures.

This was an easy experiment.

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Apologia General Science Experiment 12.1 What Combustion Needs

Apologia General Science 

Experiment 12.1 What Combustion Needs

These are the things we needed for the experiment.  Dd decided to add blue food color to the liquid in the bowl, for fun, towards the end, for fun!  You don't need to though!

First Dd lite the candle, then put a glass over the flame/candle to see how it would react.

The flame is using up the oxygen in the glass.

Once the oxygen was gone, the candle went out.

Next Dd added in a cup of vinegar...maybe 1 1/2 cups.

Then she lite the candle again, and it burned.

Then she added teaspoons of baking soda.

As the vinegar mixed with the baking soda, carbon dioxide was formed, and without oxygen, the candle went out.

For fun, Dd added blue food coloring to watch it spread out.

Dd lite another candle and tried to re-light the candle, but the bowl was still full of carbon dioxide, and would NOT light!  The match went out as soon as it got below the surface of the bowl.

Dd swished the air around in the bowl and cleared out the carbon dioxide, then tried another match, and it did light.

We've done this experiment with dry-ice and it works just the same.  It is easier to gather vinegar and baking soda than dry-ice!  

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