คำนำAll living organisms are made of cells. The smallest cells are about …
คำนำAll living organisms are made of cells. The smallest cells are about 0.001 millimeters in diameter and belong to one of two domains: Bacteria and Archaea. Organisms in these groups do not have a nucleus or membrane-bound organelles. These organisms were some of the first to live on the planet; archaea lived over 3.5 billion years ago.Organisms can belong to a third domain: Eukarya. Eukaryotic cells are larger (0.01 to 1 mm) and contain a nucleus and organelles, such as mitochondria and endoplasmic reticulum. Plants, animals, fungi and protists belong to this domain.**In this investigation, you will view both preserved specimens and living specimens from the domain Eukarya and the domain Bacteria.จุดประสงค์Getting to Know the Domain Bacteriaมาตรฐาน/ ตัวชี้วัด ---------------------------------------------------------------------------------------------------------
Can you pull a car with cordage made just from a plant? …
Can you pull a car with cordage made just from a plant? We put it to the test! This clip with Jefferson Patterson Park and Museum's Educator Nate Salzman provides a simple demonstration proving that a cell's microscopic structure affects its macroscopic properties. Included in the video is the very simple method needed to produce and test cordage from yucca leaves on your own.
If you're thinking of using this in a classroom, considering pairing this exploration of cells' structures with an engineering challenge! Yucca fiber can be made without boiling the leaves, if needed: students can either pound/mash leaves to isolate fibers or fibers can be peeled from wet leaves and used while still "green" (any cordage made from green fibers will loosen as it dries, however).
This resource is part of JPPM’s open educational resources project providing education content from our in-house educators, horticulturalists, curators, and conservationists at our 560 acre public park. The grounds have provided a home for different peoples for over 10,000 years and includes extensive archaeological sites, multiple ecosystems, and a 1930s farmstead designed by architect Gertrude Sawyer for the park’s namesake, Jefferson Patterson.
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