We had a small test today which helps us check on our understanding on the concepts we had learnt so far. Mdm Riza also told us that there would be small quizzes given every now and then. From this quiz, I have learnt that oxygen molecules, which are in the gaseous state, do not have a fixed shape and volume. This is because the particles in the gas are able to move freely to occupy any available space. Since the particles are spaced far apart from one another, oxygen molecules (gas) can be compressed easily.
I had also learnt that the melting point of matter can be used to identify a substance and to test its purity. For example, we are able to identify that a matter, in its solid state, is probably pure water when we find out that it melts at 0ºC.
(Melting Point of Pure Ice)
Sources: Google Images
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