Posted
on April 5, 2015
Chemists
had struggled to figure out what made different materials behave
differently, and wondered if matter was made up of discrete
particles. Finally, in the early 1800s, chemist John Dalton made some
experimental discoveries that resulted in the modern theory of matter
being made up of atoms.
As
Dalton later said, “Chemistry
began then to assume a new appearance."
Today's
famous birthday did a similar service for the field of biology. Born
on this date in Germany, in 1804, Matthias Schleiden studied plants.
His botanical studies particularly concentrated on observing plant
parts under the microscope. Schleiden wrote that all the different
parts of a plant are composed of discrete cells.
Schleiden is credited as being the co-founder of the cell theory, because
Theodor Schwann wrote about animals tissues being made up of cells.
Cells are now known as the building block of life, the basic structural unit of all living things.
Celebrate Schleiden by learning about cells!
- Cells are the Starting Point, at Biology 4 Kids
Cell activities, by Kathi
Mitchell
- Making a jello cell model, by Enchanted Learning
Also
on this date:
Plan
ahead:
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out my Pinterest boards for:
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here are my Pinterest boards for:
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