Light and Sound 1 - Year 8

Which of the following is a light source? (choose more than 1)

• sun

• light bulb

• fire

• television

• stars

(choose all the right answers)

Light

• is a source of energy

• travels in waves

• is produced only through electricity

• is needed for photosynthesis

• is needed to support aquatic life

Light travels as a transverse wave

• true

• false

A luminous object

• absorbs light

• gives off light

• reflects light

• is a detector of light

A non-luminous object

• absorbs light

• gives off light

• reflects light

• is a detector of light

The moon is a luminous object

• true

• false

The stars are luminous

• true

• false

A transparent material

• does not allow any light to pass through it

• allows all the light to pass through it

• reflects light

• gives off light

• only allows some light to pass through and the light is scattered

A translucent material

• does not allow any light to pass through it

• allows all the light to pass through it

• reflects light

• gives off light

• only allows some light to pass through and the light is scattered

An opaque material

• does not allow any light to pass through it

• allows all the light to pass through it

• reflects light

• gives off light

• only allows some light to pass through and the light is scattered