Difference between revisions of "Reversible Changes"

Latest revision as of 08:37, 31 August 2018

A reversible change is a change which can be undone.

In a reversible change you can get back the substance you started with.

A change that cannot be reversed is called irreversible.

Reversible changes you should know are:

Making shapes with playdough is a reversible process.

Once you squash playdough into a new shape you can squeeze it back into the original shape.

Melting and Freezing are reversible.

A solid will melt and become a liquid. You can then freeze it to become a solid again.

Condensing and Evaporating are reversible.

When a gas is condensed into a liquid you can always evaporate it back into a gas.

@@ Line 12: / Line 12: @@
 *[[Condensing]]
 *[[Dissolving]]
+===Examples===
+{| class="wikitable"
+|+ Making shapes with playdough is a reversible process.
+|-
+|[[File:Playdough.png|center|400px]]
+|-
+| style="height:20px; width:400px; text-align:center;" |Once you squash playdough into a new shape you can squeeze it back into the original shape.
+|}
+{| class="wikitable"
+|+ Melting and Freezing are reversible.
+|-
+|[[File:Melting.png|center|600px]]
+|-
+| style="height:20px; width:600px; text-align:left;" | A [[solid]] will [[Melting|melt]] and become a [[liquid]]. You can then [[Freezing|freeze]] it to become a [[solid]] again.
+|-
+|[[File:Freezing.png|center|600px]]
+|}
+{| class="wikitable"
+|+ Condensing and Evaporating are reversible.
+|-
+|[[File:Condensing.png|center|600px]]
+|-
+| style="height:20px; width:600px; text-align:left;" | When a [[gas]] is [[Condensing|condensed]] into a [[liquid]] you can always [[Evaporating|evaporate]] it back into a [[gas]].
+|-
+|[[File:Evaporating.png|center|600px]]
+|}