Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
Check
Across: 1. The reaction occuring when calcium carbonate is heated in a kiln is known as thermal _____________________ 4. The product obtained when sand and water is mixed with cement 5. Calcium carbonate does this when heated in a kiln. 7. The product obtained when powdered limestone is heated in a kiln with powdered clay. 8. This is needed to make concrete 9. Limestone consists mainly of calcium _________________ 10. Limestone is eroded by ____________ rain. 11. The product obtained when gravel, sand and water are added to cement.
Down: 2. Limestone is gradually _____________ when acid rain falls on it. 3. Limestone is a ________________ rock. 6. This type of lime can be used to neutralise soils and lakes.