Science Eight Chapter Six: Question Preview (ID: 4199)


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Which of the following is referred to when we speak about the colour of someone's eyes?
a) iris b) pupil c) retina d) sclera
Which of the following is the white part of the eye?
a) iris b) pupil c) sclera d) cornea
Which of the following is true?
a) the pupil is larger in dim light b) the pupil never changes in size c) the pupil is smaller in dim light d) the pupil is larger in bright light
What does the term 'focus' mean?
a) to make the image look larger than the real size b) to absorb light and record a tiny part of the whole image c) to make light strike a boundary between two materials causing it to reflect d) to make a clear image by adjusting the distance between the screen and the lens
What does a microscope use to magnify objects?
a) one convex lens b) two convex lenses c) two concave lenses d) a convex lens and a concave lens
Which of the following is FALSE about optical fibres
a) can transmit laser light b) are opaque glass fibres c) make use of total internal reflection d) used in telecommunications and in medicine
Which of the following is FALSE about laser light?
a) used in surgery b) just one wavelength c) carries a small amount of energy d) has all the crests and troughs lined up
The Hubble telescope is an example of a ____________ telescope
a) really big b) reflecting c) refracting d) multiple mirror
Lizzy cannot see far-away objects clearly; she has
a) near-sightedness b) far-sightedness c) astigmatism d) blindness
To fix astigmatism
a) the light rays need to be re-focussed using lenses b) the light rays need to be focussed on the pupil better c) the light rays need to be focussed on the iris better d) the light rays need to be broken up
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