How elements are formed

Our world is made of elements and combinations of elements called compounds. An element is a pure substance made of atoms that are all of the same type. At present, 116 elements are known, and only about 90 of these occur naturally. Neon – element number 10 on the periodic table – is an inert gas discovered by Sir William …

Seed dispersal

Plants make seeds that can grow into new plants, but if the seeds just fall to the ground under the parent plant, they might not get enough sun, water or nutrients from the soil. Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. The most common methods …

Fire behaviour

Fires behave differently. Some burn slowly and evenly; others are extremely hot, burning fiercely and quickly. Different fires have different coloured flames. Some fires start easily; others don’t. Some fires produce deadly gases that could kill you if not ventilated.   Log fire Fires are different depending on the variables involved. This log fire is a controlled fire, designed to …