calcium

Everyday

1. Calcium is a mineral that our bodies need for strong bones and teeth. tree →
2. Calcium is a chemical element, a soft silver metal found in rocks, chalk, shells and milk. tree →

In the lessons

In science and health lessons pupils learn that milk, cheese, yoghurt, green vegetables and fish with bones give calcium, which keeps bones and teeth strong. Chalk, limestone, eggshells and seashells are made of calcium carbonate. Phrases: rich in calcium, calcium for strong bones.

Examples

• Milk has lots of calcium. tree →
• Calcium helps build strong bones and teeth. tree →
• Cheese and yoghurt are rich in calcium. tree →
• Eggshells are made mostly of calcium. tree →
• Chalk contains calcium. tree →
• Broccoli also has some calcium. tree →

Note

Uncountable noun. Its chemical symbol is Ca. In the body it is not a lump of metal but part of other substances. Myth: only milk gives calcium — many foods do. Bones also need vitamin D (from sunlight) to take in calcium.