Summary: Matter
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Read the summary and the most important questions on Matter
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2 working in a laboratory safely
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Where is the yellow flame used for?
when you do not need to use the burner for a little while -
Where is the colourless flame used for?
it is generally used for heating a small amount of substance slowly and carefully, eg. small liquid test tube -
What is the rustling flame?
flame with a blue centre is used for heating a large amount of a substance to high temperature. -
What is deionised water?
water from which dissolved calcium slats have been removed. -
How do you conduct an experiment?
action: you do something
observation: you see, hear, smell of feel something
conclusion: now you can ponder these observations and draw a conclusion -
Why do you perform experiments?
-develop practical skill
- learn how to handle substances with simple tools
- learn lot about properties of substances
- easier to remember the results
teaches you to work systematically and reflect on what you are doing -
What are models of molecules?
olecules are so unimaginably small that you will need complex scientific equipment to amke them visible. -
3 Substances an their properties
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What is property of matter?
a property thaqt is typical of a substance -
What are the melting point and the boiling point of a substance?
the temperatures at which a substance changes from one state of matter to another. -
How do we also call the melting point and the boiling point of a substance?
constants of a substance
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