Soil erosion is the loss of healthy and fertile topsoil through water or wind, leaving behind poorer quality subsoil. Soil erosion can lead to famine in developing countries, because the…
A sunspot is a cooler area on the surface of the sun, which shows up as a patch that is darker than the rest of the sun’s surface. A sunspot…
Soil is everywhere – in fields, gardens, woods. Even in pots in houses for house plants. It is what plants need for growth, but what is it actually made of?…
In Edwardian times, growing plants in glass cases was very popular, especially because it protected delicate plants, such as ferns, from polluted air. These were generally bottle-sized or aquarium-sized, and…
Recycling is important because it saves energy and resources and reduces pollution, as well as creating jobs and keeping things out of landfill. Paper Paper is made of wood fibres….
Desalination means taking the salt out of salty water (from lakes or the sea) to make fresh, drinkable water. How Does Desalination Work? The two main ways to remove the…
Condensation, on the inside of the kitchen window on a chilly morning or on a cold glass of water, and dew on the grass on a cool autumn evening, is…
The pH scale is a scale of numbers that describes how acid or alkaline (another word for alkaline is ‘basic’) something is. A pH indicator is a liquid or paper…
Polymers are made of long molecules like chains that stick to each other (cross-link). Natural polymers include hair, wool and cellulose (in plants). Plastic is a synthetic polymer. ‘Silly Putty’…
