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A '''shadow''' is a dark area caused by an object blocking the [[light]].
===About Shadows===
: A shadow can be caused by an [[Opacity|opaque]] object blocking the light from any light source like the sun[[The Sun]], or a light bulb.
{| class="wikitable"
|[[File:ShadowStick1.png|center|200px]]
|[[File:ShadowStick2.png|center|200px]]
|[[File:ShadowStick3.png|center|200px250px]]
|-
| style="height:20px; width:200px; text-align:center;" |When the light source is overhead the '''shadow''' is underneath the object.
| style="height:20px; width:200px; text-align:center;" |When the light source gets lower the '''shadow''' gets longer.
| style="height:20px; width:200px250px; text-align:center;" |The lower the light source, the longer the '''shadow'''.
|}
|+ The size and shape of a '''shadow''' depends on the position of the light source and object.
|-
|[[File:ShadowCylinder1.png|center|200px300px]]|[[File:ShadowCylinder3.png|center|200px300px]]|[[File:ShadowCylinder2.png|center|200px300px]]
|-
| style="height:20px; width:200px; text-align:center;" |When the light source is far away the '''shadow''' is smaller.
| style="height:20px; width:200px; text-align:center;" |If you move the object around you can get a different shaped '''shadow'''.
|}
===Note for Teachers===
In year 7 students frequently answer the following question incorrectly:
Only the sun [[The Sun]] can cause shadows: True or False? It is unclear where this misconception comes form but teachers should take special care to ensure students consider this question thoughtfully.