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Grade 4 Science Revision semester 2
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  • If the delimiter is used in a question, the question should be surrounded by double quotes: "My, question","My, answer"
  • The first answer in the multiple choice question must be the correct answer.

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what is pitch and amplitude of a phone ring? Why?
high pitched, quiet. So that people in the room could hear but not disturbing others
How is a shadow created?
opaque objects block the light
Why do cat's eyes look bright?
they reflect light
Name 3 low pitched sounds
appropriate answer
Name 3 high pitched sounds
appropriate answer
Name 3 artificial sources of light
candle, tv screen, phone screen, lightbulb and etc.
Name 3 natural sources of light
lightning, firefly, the Sun, fire etc
does mirror reflect or absorb light?
reflect
does wall reflect or absorb light?
absorb
does metal spoon reflect or absorb light?
reflect
does white coat reflect or absorb light?
reflect
does black skirt reflect or absorb light?
absorb
what is opaque?
light can not go through
what is transparent?
light can go through
what is translucent?
light can partially go through
True or False: there are 3 tiny boned inside the ear
true
True or False: if a sound is high pitched it must be quiet
false
True or False: paper sheet is an opaque material
false
True or False: The Moon is a source of light
false
True or False: Sound is a straight line
false
Frequency describes
how many waves per second sound makes
Give 3 examples of low pitch sounds
dog barking, cat purring, brushing teeth etc
Give 3 examples of high pitch sounds
whistle, doorbell, phone ringing etc.
What light source does not produce heat?
appropriate answer
dirty water in the pond is a) transparent b) translucent c) opaque
opaque
Is it artificial or natural source of light: lightning
natural
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