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          Being a scientist
        
        
          How much bigger do things look through a microscope?
        
        
          
            Science and technology
          
        
        
          Scientists study the world around
        
        
          us. They look for gaps in our
        
        
          knowledge and try to find the
        
        
          answers. Not all scientists study
        
        
          the same things – they specialize
        
        
          in different areas.
        
        
          
            Testing, testing
          
        
        
          Scientists explore their ideas and theories
        
        
          using tests called experiments. In this
        
        
          book, there are lots of “hands-on”
        
        
          experiments you can do to
        
        
          try things out
        
        
          for yourself.
        
        
          
            Mixing it up
          
        
        
          Experimenting with chemicals and
        
        
          their reactions can produce some
        
        
          mixed results. Some mixtures can be
        
        
          dangerous, while others can be the
        
        
          answer the scientists are after.
        
        
          Experiments can involve
        
        
          toxic fumes or chemicals that
        
        
          might explode, so scientists
        
        
          wear protective goggles.