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7.1   A Close Look at Stuff




An image of a galaxy as it was 60 million years ago.  It’s the galaxy NGC 4414 in the constellation Coma Berenices.


INTRODUCTION

Some of the most basic questions that a scientist can ask are -

  1. Bullet“What is the world made of?”

  2. Bullet“What are the differences between solids, liquids and gases?”

  3. Bullet“What happens when stuff changes state?”

  4. Bullet“Is stuff made of particles, or would it always be the same, no matter how small you grind it?”


You may think you know the answer to at least some of these questions - but how do you know?  What evidence do you have?

In this topic we look for evidence for what stuff is made of, find out about the different kinds of stuff (chemicals) and what they are used for in everyday life.

This topic should also introduce you to some of the commonly-used laboratory equipment and the need for safety in practical investigations.


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