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Grade 8 Natural Science
Changes of state
When a substance changes from a solid to a liquid to a gas we say that a change of state has taken place. In this lesson we learn about what happens when substances change from one state to next and how they gain or lose energy.
Up Next in Term 2
Density, mass and volume
All matter has density, mass and volume. We are going to look at these characteristics in more detail including the formula that we can use to find density.
Expansion and contraction of material...
In previous lessons we discussed the changes of state with particles. In this lesson we learn about the expansion and contraction of materials and the pressure of gas.
We have looked at the physical changes that take place in matter when they are heated and cooled. In this lesson we look at what happens during chemical reactions that take place in substances.