Solvent – is a substance that dissolves other materials to form a solution A solution – is a mixture of a solute and solvent A Dilute Solution – has a small amount of solute in a large amount of solvent A Concentrated Solution – has a large amount of solute… Continue Reading →
“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.”
All living things are made of cells. In the human body, these highly efficient units are protected by layer upon layer of defense against icky invaders like the cold virus. Shannon Stiles takes a journey into the cell, introducing the microscopic arsenal of weapons and warriors that play a role… Continue Reading →
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 →
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 →
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 →
Electricity Generation Follow electricity from its source to the light bulb in your home, explaining different fuels, thermal power generation, transmission and the grid. Solar Power An inside look at solar-power technology. Break down the different types of solar devices and how they work, detailing the pros and cons of… Continue Reading →
