The element calcium is found in all four items.
Calcium
Calcium and phosphorus are the two major elements found in milk.
Calcium is the metallic component of the substance limestone. Limestone, or calcium carbonate, is an example of a sedimentary rock.
The bulk of marine skeletal remains are composed of the mineral calcite. Some marine organisms also have shells of aragonite or silica.
Crayons have a very complex composition: wax, coloring agents, binder, chalk etc.
Calcium carbonate (CaCO3) exist in many countries as limestone or other minerals.
Calcium (20Ca)
Chalk is a type of limestone and found in limemud. It is also found at The White Cliffs of Dover in the south of England.
Calcium.
it is one of the following soap or copper or ; limestone or wood or marble or baking powder or chalk which you need to find
The Chalk Downs are made of limestone, as are the Pennine Hills which run up the spine of England.
Calcium and phosphorus are the two major elements found in milk.
they are both rocks but both formed different ways chalk is formed by dead sea creatures skeleltons build up to form chalk and limestone is formed by shells and very littke amounts of mud and sand
quartz, bauxite, shale, limestone, chalk, gypsum,
CALCIUMThis element is calcium (Ca).
Fossils of animals and plants can be found in sedimentary rock (limestone, chalk, slate, etc).
Limestone is often sedimentary, formed of calcite in the form of shells and coral. So it's found where there used to be an ocean.
limestone-sedimentary