2006-06-08 05:03:51 · 20 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
calcium carbonate...
calcium and carbon....
2006-06-08 05:04:58 · answer #1 · answered by Br. Benjamin 4 · 1⤊ 0⤋
Chalk is a soft, white, porous form of limestone composed of the mineral calcite. It is also a sedimentary rock. It is relatively resistant to erosion and slumping compared to the clays with which it is usually associated, so forms tall steep cliffs where chalk ridges meet the sea. Chalk hills, known as chalk downland, usually form where bands of chalk reach the surface at an angle, so forming a scarp slope.
Chalk is formed in shallow waters by the gradual accumulation of the calcite mineral remains of micro-organisms, over millions of years. Embedded flint nodules are commonly found in chalk beds.
2006-06-08 05:07:05 · answer #2 · answered by lexie 6 · 0⤊ 0⤋
What is is made of? Not what is it called.
Another name is diotomaceous earth. As its name
implies, it's made of diatoms -microscopic organisms.
In this case, the shells from tiny mollusks built up for
eons on the ocean floor, then with pressure and time
it turned into chalk. Then the ocean and land moved
and expose it to dry land. Voila! Chalk
2006-06-08 05:14:02 · answer #3 · answered by albert 5 · 0⤊ 0⤋
Chalk is actually made of fossilized animals that are found in coral settings. Here's what Wikipedia said:
"Chalk is formed in shallow waters by the gradual accumulation of the calcite mineral remains of micro-organisms, over millions of years."
2006-06-08 05:07:07 · answer #4 · answered by bigred8882 4 · 0⤊ 0⤋
Chalk powder
2006-06-08 05:06:34 · answer #5 · answered by hari_gvnd 2 · 0⤊ 0⤋
Chalk Dust..
2006-06-08 05:06:32 · answer #6 · answered by Dbl Monday 4 · 0⤊ 0⤋
Chalk is a soft, white, porous form of limestone composed of the mineral calcite.
Limestone, is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3).
The carbonate mineral calcite is a calcium carbonate corresponding to the formula CaCO3.
2006-06-08 05:07:39 · answer #7 · answered by katbg 3 · 0⤊ 0⤋
Chalk is a rock derived from marine ooze and largely composed of fossil remains of unicellular algae. Mineral: calcite
2006-06-08 05:06:59 · answer #8 · answered by dougc2c 2 · 0⤊ 0⤋
Calcium carbonate
2006-06-08 05:09:22 · answer #9 · answered by F.B.I. 4 · 0⤊ 0⤋
chalk is derived from millions of fossilized seashells that have accumulated over millions of years
2006-06-08 05:07:44 · answer #10 · answered by That one guy 6 · 0⤊ 0⤋
Calcium carbonate....and by the way, we used to pay a kid in high school to eat it and let us watch. It was hilarious at the time. (Thank God for growing up!)
2006-06-08 05:05:52 · answer #11 · answered by Anonymous · 0⤊ 0⤋