Difference between revisions of "Shadows"
(Created page with "==Key Stage 2== ===Meaning=== A '''shadow''' is a dark area caused by an object blocking the light. ===About Shadows=== : A shadow can be caused by an opaque o...") |
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: A shadow can be caused by an [[Opacity|opaque]] object blocking the light from any light source like the sun, or a light bulb. | : A shadow can be caused by an [[Opacity|opaque]] object blocking the light from any light source like the sun, or a light bulb. | ||
| + | {| class="wikitable" | ||
| + | |+ The length of this '''shadow''' depends on the position of the light source and object. | ||
| + | |- | ||
| + | |[[File:ShadowStick1.png|center|200px]] | ||
| + | |[[File:ShadowStick2.png|center|200px]] | ||
| + | |[[File:ShadowStick3.png|center|200px]] | ||
| + | |- | ||
| + | | 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:200px; text-align:center;" |The lower the light source, the longer the '''shadow'''. | ||
| + | |} | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |+ The size and shape of a '''shadow''' depends on the position of the light source and object. | ||
| + | |- | ||
| + | |[[File:ShadowCylinder1.png|center|200px]] | ||
| + | |[[File:ShadowCylinder3.png|center|200px]] | ||
| + | |[[File:ShadowCylinder2.png|center|200px]] | ||
| + | |- | ||
| + | | 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;" |When the light source is closer to the object the '''shadow''' is bigger. | ||
| + | | style="height:20px; width:200px; text-align:center;" |If you move the object around you can get a different shaped '''shadow'''. | ||
| + | |} | ||
===Note for Teachers=== | ===Note for Teachers=== | ||
In year 7 students frequently answer the following question incorrectly: | In year 7 students frequently answer the following question incorrectly: | ||
Only 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. | Only 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. | ||
Revision as of 14:10, 14 August 2018
Key Stage 2
Meaning
A shadow is a dark area caused by an object blocking the light.
About Shadows
- A shadow can be caused by an opaque object blocking the light from any light source like the sun, or a light bulb.
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| When the light source is overhead the shadow is underneath the object. | When the light source gets lower the shadow gets longer. | The lower the light source, the longer the shadow. |
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| When the light source is far away the shadow is smaller. | When the light source is closer to the object the shadow is bigger. | 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 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.