The Importance of Calcium: Building Strong Bones and More

Calcium, an alkali Earth metal, is essential for strong bones and teeth. Discovered by Humphry Davy, it is not consumed in its metal form. Calcium compounds like gypsum and lime have various uses in construction and food. In the body, calcium is crucial for bone health, muscle contraction, and nerve function.

Who first successfully isolated calcium, and in what year?

• John's Jacob Brazilians in 1805

• Humphry Davy in 1808

• Magnus Pontine in 1806

• Antoine Lavoisier in 1799

What is another name for calcium sulfate, and where is it commonly used?

• Calcium carbonate, used in agriculture

• Plaster of Paris, used in art

• Gypsum, used in construction

• Limestone, used in architecture

How does calcium hydroxide help in water treatment?

• It forms clumps with dirt for easy removal

• It adds minerals to the water

• It increases water acidity

• It acts as a disinfectant

Which of the following foods is NOT a recommended source of calcium?

• Leafy green vegetables

• Fish

• Nuts

• Red meat

What role do calcium ions play in the human body?

• They are used in digestion

• They are responsible for oxygen transport

• They are involved in photosynthesis

• They help in muscle contraction and nerve conduction