
grade 9 final revision unit 1 & 2
Authored by Waleed Elhady
Science
9th Grade
Used 1+ times

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39 questions
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1.
OPEN ENDED QUESTION
3 mins • Ungraded
Draw the opposite figure in your answer paper, then :
(a) Complete the figure to obtain an
image for the object.
(b) Mention the properties of the formed image.
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2.
OPEN ENDED QUESTION
3 mins • Ungraded
An object with 6 cm height is placed at a distance 10 cm, from a convex lens.
its focal length is 5 cm, therefore the height of the formed image is.........
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3.
OPEN ENDED QUESTION
3 mins • Ungraded
Draw the figure in your answer paper, then complete to obtain real, inverted and diminished image for the object (A).
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4.
OPEN ENDED QUESTION
3 mins • Ungraded
Draw the opposite diagram in your answer paper, then:
- Complete the path of the rays to form an image for the object.
- Determine the position of the formed image from the figure.
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5.
OPEN ENDED QUESTION
3 mins • Ungraded
If an object is put in front of a convex lens at a distance of 30 cm and its image is
formed behind the lens at a distance of 30 cm, the focal length of the lens is............
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6.
OPEN ENDED QUESTION
3 mins • Ungraded
The incident light ray that passes through the optical center of the convex lens, it exits from the lens ------------
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7.
OPEN ENDED QUESTION
3 mins • Ungraded
If the diameter of the sphere of a lens equals 15 thus the focal length equal ---------
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