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Measuring Heat and Graphing |
OBJECTIVES:
VOCABULARY:
MATERIALS:
BACKGROUND:
Microorganisms have
chemical requirements primarily carbon for energy, nitrogen to build
proteins, and oxygen for respiration.
Interacting with these are physical requirements including aeration
to maintain optimal oxygen levels while not depleting the moisture
necessary for microbial growth.
Decomposers, such
as some bacteria and fungi, get their energy by eating dead organisms.
Individual decomposers are rarely visible without a microscope, but
colonies of them (such as bread mold) can be observed.
Decomposers have the ability to break down dead organisms into
smaller particles and new compounds, resulting in fertile soil that
provides important building materials for plants.
This decomposition process releases
heat. The generation of heat
helps to make sure that the “bad” microbes do not take over and cause harm
to humans. Compost piles
have to be large enough to go through this thermophilic process.
Measuring the temperature is very important to make sure it goes
through all these phases.
Composting occurs
because of the efforts of microorganisms. Although worms and
insects also help,
microorganisms are the key workhorses of composting. There are
three major
organisms that are important in composting including:
QUESTION:
How is energy released during composting?
BACKGROUND:
Making compost needs to be monitored to prevent microorganism from
harming people. Compost needs
to go through 160 degrees Fahrenheit, 60 degrees Celsius
RESEARCH FOR CLASS:
What is soil? How does
compost enhance soil? What is
the carbon to nitrogen ratio in compost?
What do plants need to survive? How
can you improve heat flow?
What if the heat gets too high?
PROCEDURE:
1.
Per
table have students look at dial thermometer.
Point out that outside is Fahrenheit and inside is Celsius.
Ask them what the long shaft is
for? Make sure they understand
that it is a sensor and should be taken care of.
We suggest that is stay in the box while not in use.
2.
Measurements will be in Celsius.
3.
Go
through the worksheet with have them plot the numbers and have them graph
it on the worksheet. With a ruler make an x and y axis.
Then number the vertical (y)as temperature and the horizontal (x)
as days.
4.
If
students are working on the worksheet, have a small group go out to the
Jora compost and show how to read the temperature.
If you have 2 docents this is ideal…or the teacher can stay with
the students.
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