| 1 | Inside, lime bonds with the carbon dioxide to form solid calcium carbonate. | |
| 2 | The white cliffs of Dover, for example, are white because they contain limestone, or calcium carbonate. | |
| 3 | Many invertebrates have shells of calcium carbonate that bear evidence of the physical conditions in which they formed. | |
| 4 | The reaction produces a calcium carbonate seal, restoring the slab to its normal load-bearing capacity. | |
| 5 | The corals familiar to most of us are colonies of small polyps that build calcium carbonate branches. |
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