By Bill Kirk
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32 įThe ingredients you put into a cake react together when they are mixed and cooked. 33 ALWAYS REACTING S o m e a t o m s a r e ver y u n s t a b l e . T h e y a r e said to be reactive.. They r eact easily and quickly, so they ar e usually found as par t of molecules. S o d i u m a n d f l u o r i n e a r e ver y r e a c t i v e . I f y o u put fluorine in water, for example, it explodes. Reactions Everywhere Chemical reactions take place around us all the time. They happen inside our bodies when we digest food.
Kevlar is a super-strong material. It is used to make bulletproof vests and space gear. ǠA bulletproof vest made using Kevlar can stop bullets in the space of just two inches. 38 ATOM POWER If an atom is split open, it r eleases ener g y. This is called nuclear fission.. Nuclear power comes fr om nuclear fission. Unfor t u n a t e l y, this invention has br ou ght pr oblems. It cr e a t e s d a n g e r o u s w a s t e . I t c a n a l s o b e used to make ver y Nuclear Neutron po wer f u l Fission nuclear weapons.
They happen inside our bodies when we digest food. They happen in cooking when we mix ingredients. A chemical reaction happens when things burn. When iron meets air and water it causes a chemical reaction. The atoms make a new molecule, iron oxide. We call it rust. įThe dome of the London Planetarium is made of copper. Copper reacts with oxygen in the air to make a molecule called copper oxide. It gives the copper a bright green coating. Chemical Reactions Atoms and molecules aren’t locked into the same patterns forever.