ACME ACADEMY

WEEKLY EVALUATION TEST

Subject: Science
Time Limit: 20 Mins
Max Marks: 20 Marks
Student Name:
Roll Number:
Class / Sec:
Date:

GENERAL INSTRUCTIONS:

  1. All questions are compulsory. Carefully read all instructions before starting.
  2. The question paper contains 20 questions.
  3. There is no negative marking for incorrect answers.
  4. Use of mobile phones, smartwatches, or calculators is strictly prohibited during the exam.
1. Which part of the human eye controls the amount of light entering it?
[1 Mark]
(A) Cornea
(B) Lens
(C) Pupil (controlled by Iris)
(D) Retina
2. The light-sensitive screen at the back of the eye where images are formed is called the:
[1 Mark]
(A) Cornea
(B) Retina
(C) Sclera
(D) Optic nerve
3. What is the near point (least distance of distinct vision) for a normal young human eye?
[1 Mark]
(A) 10 cm
(B) 25 cm
(C) 50 cm
(D) Infinity
4. The ability of the eye lens to adjust its focal length to see both near and distant objects is known as:
[1 Mark]
(A) Accommodation
(B) Dispersion
(C) Refraction
(D) Adaptation
5. A person who can see nearby objects clearly but cannot see distant objects distinctly is suffering from:
[1 Mark]
(A) Hypermetropia
(B) Presbyopia
(C) Myopia
(D) Cataract
6. Which type of lens is used to correct Myopia (near-sightedness)?
[1 Mark]
(A) Convex lens
(B) Concave lens
(C) Bifocal lens
(D) Cylindrical lens
7. Hypermetropia (far-sightedness) is corrected by using spectacles containing a:
[1 Mark]
(A) Concave lens
(B) Plane mirror
(C) Convex lens
(D) Prism
8. Old age stiffness of the ciliary muscles leads to a condition where it is difficult to read nearby things clearly. This is known as:
[1 Mark]
(A) Astigmatism
(B) Myopia
(C) Presbyopia
(D) Colour blindness
9. The splitting of white light into its component colours when passing through a prism is called:
[1 Mark]
(A) Reflection
(B) Dispersion
(C) Interference
(D) Diffraction
10. In the spectrum of white light produced by a prism, which colour bends the LEAST?
[1 Mark]
(A) Violet
(B) Red
(C) Green
(D) Yellow
11. Which natural phenomenon is caused by the dispersion of sunlight by tiny water droplets in the atmosphere?
[1 Mark]
(A) Twinkling of stars
(B) Blue colour of the sky
(C) Rainbow
(D) Early sunrise
12. The twinkling of stars is primarily due to:
[1 Mark]
(A) Atmospheric refraction of starlight
(B) Dispersion of starlight
(C) Continuous explosions on the star
(D) Total internal reflection
13. Why do planets NOT twinkle like stars?
[1 Mark]
(A) Planets produce their own continuous light.
(B) Planets are much closer to Earth and act as extended light sources.
(C) Planets have no atmosphere of their own.
(D) Planets absorb starlight.
14. The blue colour of the clear sky is caused by which optical phenomenon?
[1 Mark]
(A) Dispersion
(B) Reflection by the ocean
(C) Scattering of light
(D) Refraction
15. During sunrise and sunset, the sun appears reddish. Why?
[1 Mark]
(A) Red light is scattered the most by the atmosphere.
(B) The sun physically becomes colder and turns red.
(C) Blue light is scattered away as light travels a longer distance through the atmosphere.
(D) Only red light enters the earth's atmosphere at an angle.
16. What is the far point of a healthy, normal human eye?
[1 Mark]
(A) 25 cm
(B) 100 cm
(C) 10 km
(D) Infinity
17. A cloudy or opaque film forming over the eye lens in older age, causing partial or complete loss of vision, is called:
[1 Mark]
(A) Glaucoma
(B) Cataract
(C) Presbyopia
(D) Myopia
18. When light enters a dense forest canopy, the path of the sunbeams becomes clearly visible. This scattering is an example of the:
[1 Mark]
(A) Tyndall effect
(B) Doppler effect
(C) Raman effect
(D) Newton effect
19. Why are 'Danger' signal lights universally made red in colour?
[1 Mark]
(A) Red is a calming colour.
(B) Red light travels the fastest in a vacuum.
(C) Red light is scattered the LEAST by fog or smoke.
(D) Red light causes the pupil to dilate.
20. The angle between the incident ray and the emergent ray in a glass prism is called the:
[1 Mark]
(A) Angle of incidence
(B) Angle of prism
(C) Angle of deviation
(D) Angle of refraction
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