Mae Gwen eisiau chwarae tric ar ei
brawd, Steffan trwy ddefnyddio
ffigwr o fwystfil bach. Mae hi’n bwriadu ei ddychryn trwy ddefnyddio golau
a chysgod. Ond, dydy Gwen ddim yn
gwybod digon eto i wybod sut i wneud
hyn yn iawn. Dydy hi ddim eisiau methu!
Gwen wants to play a trick on her
brother using a toy figure of a monster. She plans to use light and shadow to create a spooky effect.
However, she does not understand enough yet to do this without
the risk of failing.
Eich gwaith cartref yw i gynllunio arbrawf fydd yn dangos beth yw
effaith pellter golau o wrthrych ar y cysgod gaiff ei ffurfio.
Your homework is to plan an investigation which will show the effect
of distance of a light source from an object on the shadow that
forms.
(Cylchwch unai ‘mwyaf’ neu ‘lleiaf’ yn y ddau osodiad i ddangos eich
rhagfynegiad (circle either ‘mwyaf’ (larger) or ‘lleiaf’ (smaller) in the
two statements to confirm your prediction.
Y pellaf y bydd golau o wrthrych, y mwyaf/lleiaf fydd y cysgod sy’n
ffurfio. (The further the light source from an object, the larger/smaller the shadow that forms)
Yr agosaf y bydd golau o wrthrych, y mwyaf/lleiaf fydd y cysgod
sy’n ffurfio. (The closer the light source from an object, the larger/smaller the shadow that forms)
Diagram wedi ei labelu yn dangos fy null
Brawddegau sy’n helpu i egluro
Labelled diagram showing the method
Sentences which help to explain the method
______________________________________________
______________________________________________
______________________________________________
______________________________________________
Distance of object from
light source
Pellter y
ffynhonell
olau o’r
gwrthrych
(
)
Height/length of the shadow
Hyd/
Taldra’r
cysgod
(
)
Cofiwch gynnwys yr uned fesur (remember to include the measuring unit)
Conclusion
Disgrifiwch beth wnaethoch chi ganfod/ddysgu yn eich ymchwiliad/
Describe what you discovered in your investigation
_____________________________________
_____________________________________
_____________________________________
_____________________________________
Gorffennwch y llun i ddangos y math o effaith byddai’r tric yn ei gael ar
wal lloft Steffan.
Complete the picture to show the type of effect Gwen’s tric might have on
Steffan’s bedroom wall.