David Bamber
Eric Slatt
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Cast
Episode Guide
- 1. Suzy Arrives Feb 20, 1997
- One of the staffers dies.
- 2. The Interview Feb 27, 1997
- Eric Slatt interviews to be headmaster.
- 3. The Staff Meeting Mar 6, 1997
- The school gets unwanted media coverage.
Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor.
The meaning of CHALK is a soft white, gray, or buff limestone composed chiefly of the shells of foraminifers. How to use chalk in a sentence.
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Jun 13, 2024 · chalk, soft, fine-grained, easily pulverized, white-to-grayish variety of limestone. Chalk is composed of the shells of such minute marine organisms as foraminifera, coccoliths, and rhabdoliths. The purest varieties contain up to 99 percent calcium carbonate in the form of the mineral calcite.
Oct 10, 2023 · Chalk is a soft, white, porous, sedimentary rock composed primarily of the mineral calcite (calcium carbonate). It is often associated with marine environments and is characterized by its distinctive white color and powdery texture.
- geology.com
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Chalk is a biological limestone derived from the tiny calcium carbonate shells of foraminifera and the calcareous remains of marine algae. It is soft, friable, porous, permeable and usually white to light gray in color.
- www.encyclopedia.com
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Jun 8, 2018 · chalk Mineral, mainly calcium carbonate (CaCO 3), formed from the shells of minute marine organisms. It varies in properties and appearance; pure forms, such as calcite, contain up to 99% calcium carbonate .
"Children must be taught how to think, not what to think." - Margaret Mead
A chalk is a soft, friable variety of limestone consisting of poorly lithified calcareous ooze, produced by the accumulation of planktonic organisms in a pelagic (open sea) environment.
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