First Children's Encyclopedia by Dorling Kindersley - page 220

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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.
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