What is a Cell?

“A cell is the basic unit of life. This means that we are built out of cells. A house could be built of concrete blocks. The block, in this instance, is the basic unit of the house just as the cell is the basic unit of life.”

Junior Cert. Science: Nutrition and Digestion

Food is needed for energy, growth, repair and protection against disease in the body. Food is made up of chemicals called nutrients A food’s energy value is how much energy that can be obtained from the food. A balanced diet consists of the correct amounts of each type of food…. Continue Reading →

Cells – Chapter Summary

A living thing is called an organism, e.g. a dog is an organism, so is a daffodil. The characteristics of living things are: Feeding -living things need food to get energy. Movement – living things move either their whole body (animals) or parts of the body (plants). Respiration – process by which organisms… Continue Reading →

Hardness in Water

Hard water is any water that forms a scum with soap. Soft water forms lather with soap. Hardness is caused by dissolved calcium and magnesium icons (Ca2+ and Mg2+). Temporary hardness Temporary hardness can be removed by boiling the water. Problems caused by temporary hardness: forms scum (wastes soap), limescale… Continue Reading →