Rubber is a natural polymer made from polyisoprene, derived from the sap of some plants such as Hevea brasiliensis or Euphorbia cerifera. Today we’re going to be looking at some more exciting and exotic varieties of rubber: namely, human-made rubbers that were invented to mimic rubber’s …
What are balloons made of? Read More »
Diamond is the hardest natural material known to man. It is so hard, and it cannot be scratched even by other diamonds! Diamonds are formed deep underground at high pressure and temperature, usually 90-120 km below the surface. Diamonds are normally carried towards the Earth’s …
What is the hardest natural material? Read More »
Fire extinguishers are devices used to extinguish or control small fires, often in emergencies. It is not designed for fighting massive fires such as wildland fires. The word “extinguisher” may refer to any of the following: Small …
What should we use to put out a fire in the house? Read More »
