edl · web view2018-01-07 · use a word processor and the mla format. include at least 3 full...
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Lutz 1
Name Date
Science Class
Food Production and Preservation Means
Using and Controlling Microbes
1. What kinds of foods do we eat? In class, complete the attached organizer.
2. With your group, choose a food from the organizer that is made with microbes, and/or
that is preserved in a way that controls microbes. Each person picks an assigned task
(list follows).
3. Examples we will discuss in class are yeast bread and raisins.
Job 1 REPORT
In a full paragraph (8-12 sentences), explain how your food
product is made and/or preserved. Use at least two sources.
Fully explain the connection between your food and microbes
Job 2 SUPPORT
Find an educational video (about 3 minutes long) about your
food product. Look for a video that supports or extends what
you say in your report (job 1).
Include at least one image with a caption. A before and after
approach works well.
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Job 3 COORDINATION
Incorporate the report, the video link, and the image into a
single document. Use a word processor and the MLA format.
Include at least 3 full citations. Submit the document
electronically to Mrs. Lutz
Make sure that everyone in the group has an important part
in the presentation (job 4).
Job 4 PRESENTATION
Present your food product to the class, without notes.
Offer a full explanation about how this food product is made
with microbes, and/or how it is preserved in a way to
discourage microbes. Include supporting images and video.
At the end of our presentation, summarize your ideas in an
interactive and/or entertaining way—consider a song, rap, or
game format.
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Lutz 3
Student Name
Mrs. Lutz
Science Class
Date
From Grapes to Raisins
Figure 1. Grapes are a fruit that comes in
different types, sizes, and colors.
Figure 2. Grapes dry into raisins that are
shelf-stable for about a year.
Raisins are made from grapes. They taste similar to grapes, but raisins are sweeter because
the drying process used to make them concentrates the sugar. Approximately four pounds of
fresh grapes are used to make one pound of raisins. The drying process, which takes up to eight
weeks, reduces moisture content from 75% to under 15%. The drying process also darkens the
color of the grapes as they turn into raisins. Raisins, which are then sold in boxes, last for about
a year without refrigeration. They resist spoilage by microbes because their low moisture
content and low pH create an environment that discourages microbes. The concentrated sugar
in the raisin causes any bacteria there to dehydrate by osmosis. Without enough water, the
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bacteria cannot grow or divide. We may like raisins because they taste sweet, but this same
sweetness is a key to why they resist spoilage from microbes.
Sources
“11 Impressive Benefits of Raisins.” Natural Food Series, 17 Dec. 2017,
www.naturalfoodseries.com/11-benefits-raisins/.
“How Does Sugar Act as a Preservative?” Science Focus, www.sciencefocus.com/qa/how-does-
sugar-act-preservative
"How Its Made Raisins Discovery Channel." YouTube. YouTube, n.d. Web. 10 May 2015.
https://www.youtube.com/watch?v=7e8DepWX4_4
"How Products Are Made." How Raisins Is Made. N.p., n.d. Web. 10 May 2015.
http://www.madehow.com/Volume-4/Raisins.html
The Zen Cart™ Team and others. “Muscadine Vitus Grape Vine Plant.” RSS Specials,
www.floridahillnursery.com/muscadine-vitus-grape-vine-plant-c-31