1. name the 3 main states of matter 2. define evaporation...fast five answers 1. name the 3 main...
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Fast Five
1. Name the 3 main states of matter 2. Define evaporation3. Define condensation4. When a solid dissolves into liquid we call it a
s___________.5. At what temperature does water freeze?
Fast Five answers
1. Name the 3 main states of matter = Solid, liquid and gas2. Define evaporation = Evaporation is the process of
changing a liquid into a gas.3. Define condensation =Condensation is the process of
changing a gas into a liquid.4. When a solid dissolves into liquid we call it a solution5. At what temperature does water freeze? 0 degrees
celsius
Can I explain melting and freezing as changes of
state?
Freezing and Melting
There are three states of matter: solid, liquid and gas.
We have seen that sometimes substances change their state depending on the temperature.
Watch this videohttps://www.youtube.com/watch?v=ExbCpriId6c
There will be a short quiz afterwards !
Quiz
1. What are the three states of matter?
2. In Science, what does melting mean?
a) It means a solid is turning into a liquidb) It means a liquid is turning into a solidc) It means it’s too hot
3. In Science, what does freezing mean?
a)It means a solid is turning into a liquidb)It means a liquid is turning into a solidc) It means it’s too hot
Quiz Answers1. What are the three states of matter? Solid, Liquid and Gas2. In Science, what does melting mean?a) It means a solid is turning into a liquidb) It means a liquid is turning into a solidc) It means it’s too hot
3. In Science, what does freezing mean?
a)It means a solid is turning into a liquid
b)It means a liquid is turning into a solid
c) It means it’s too hot
Quiz
4) What does the melting point mean ?
5) What does the freezing point mean?
6) At what temperature does water freeze?
Quiz
4) What does the melting point mean ? It is the temperature where a solid becomes a liquid.
5) What does the freezing point mean?It is the temperature where a liquid becomes a solid.
6) At what temperature does water freeze?0 C
ExamplesChocolate has a melting point of 35 °C (degrees celsius).
Different substances have different melting points.
Metals
Copper is a metal. Its melting point is much higher than chocolate. It melts at 2562 °C.
IronIron has a lower melting point than Copper. It melts at 1535.1 °C.
Chlorine
Chlorine is a chemical that keeps swimming pools clean. It freezes at -101.5 °C.
Different substances have different freezing points.
Chocolate
Chocolate has a freezing point of 12°C: higher than water.
Water
We know that fresh water freezes at 0°C, sea water freezes at -2°C.
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