1. Which language does the word 'Calcium' come
from?
2. List five forms of Calcium commonly found in
a hermit crab tank
3. What is the chemical formula for limestone?
4. Calcium carbonate is used to make
a. cleaning powder
b. toothpaste
c. stomach antacids
d. all of the above
5. What is the density of Calcium?
6. True or False: A hermit crab's exoskeleton is
made of Calcium
7. True or False: Calcium is the fourth most abundant
element in the Earth's crust.
8. True or False: About 4.2% of the earth's crust
is composed of calcium.
9. True or False: Metallic calcium was first isolated
by Sir Humphrey Davis in 1808
10: True or False: Calcium sulfate (CaSO4) is also
known as gypsum
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Jefferson
Lab: Its Elemental!: Calcium