219
          
        
        
          
            A closer look
          
        
        
          During the
        
        
          17th century,
        
        
          the microscope
        
        
          was developed
        
        
          by Dutchman Anton
        
        
          van Leeuwenhoek and
        
        
          refined by Robert Hooke
        
        
          in England. Early models
        
        
          revealed the tiny organisms in
        
        
          water, while modern versions
        
        
          can look inside a single cell.
        
        
          
            Being a scientist
          
        
        
          Some microscopes can magnify up to 1,000 times!
        
        
          
            Biologists
          
        
        
          are interested
        
        
          in everything about life
        
        
          and living organisms.
        
        
          
            Paleontologists
          
        
        
          know
        
        
          about fossils, and try
        
        
          to learn from them.
        
        
          
            Botanists
          
        
        
          learn about
        
        
          the world of plants, plant
        
        
          types, and plant groups.
        
        
          
            Zoologists
          
        
        
          study animals
        
        
          of all kinds, except for
        
        
          human beings.
        
        
          
            Types of scientist
          
        
        
          Almost everything in
        
        
          the world is the subject
        
        
          of study by a scientific
        
        
          specialist.
        
        
          Plants take up food
        
        
          and water from the soil
        
        
          and transport it up the
        
        
          stem. Experiments allow
        
        
          scientists to observe
        
        
          and theorize how things
        
        
          work and why.
        
        
          
            Astronomers
          
        
        
          are experts
        
        
          on space, the planets, the
        
        
          stars, and the Universe.
        
        
          
            Entomologists
          
        
        
          are a
        
        
          special kind of zoologist
        
        
          who learn about insects.
        
        
          
            Geologists
          
        
        
          find out about
        
        
          our Earth, particularly
        
        
          by studying rocks.
        
        
          
            Chemists
          
        
        
          study elements
        
        
          and chemicals, and they
        
        
          help make new substances.
        
        
          
            Ecologists
          
        
        
          study the
        
        
          relationship between living
        
        
          things and their environment.
        
        
          
            Oceanographers
          
        
        
          know
        
        
          all about ocean life and
        
        
          landscapes.
        
        
          
            Archaeologists
          
        
        
          are
        
        
          interested in the remains
        
        
          of past peoples and lives.
        
        
          H
        
        
          a
        
        
          n
        
        
          d
        
        
          s
        
        
          o
        
        
          n
        
        
          
            Inside view
          
        
        
          When you go to hospital,
        
        
          the doctor may send you
        
        
          for a body scan. Using
        
        
          a powerful machine,
        
        
          the medical team can see
        
        
          what’s going on inside you.
        
        
          
            Hooke’s
          
        
        
          
            microscope
          
        
        
          Fill a cup
        
        
          or vase with
        
        
          water, and add a few
        
        
          drops of food colouring.
        
        
          Cut the end off the stem
        
        
          of a flower and put the
        
        
          flower in the water.