Worksheets8T1 SCI3
Total questions: 25
Worksheet time: 16mins
The spherical mirror used as a rear view mirror in the vehicle is
a) concave mirror
b) convex mirror
c) plane mirror
d) None of the above
The distance from the pole to the focus is called
a) pole length
b) focal length
c) principal axis
d) None of the above
The imaginary line passing through the centre of curvature and pole of a spherical mirror is called
a) centre of curvature
b) pole
c) principal axis
d) radius curvature
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
a) 10 cm
b) 5 cm
c) 20 cm
d) 15 cm
Geometric centre of the spherical mirror is -------- . (a)
If an object is placed between two mirrors which are parallel to each other, the number of images formed is ---------. (a)
The mirror used by the ophthalmologist to examine the eye is -----------. (a)
Parobolic mirror
a. Radio telescopes
b. rear - view mirror
c. Rainbow
d. Kaleidoscope
Dispersion of light
a. Radio telescopes
b. rear - view mirror
c. Rainbow
d. Kaleidoscope
Aerated water contains
a) air
b) oxygen
c) carbon dioxide
d) nitrogen
Carbon dioxide with water changes
a) blue litmus to red
b) red litmus to blue
c) blue litmus to yellow
d) doesn’t react with litmus
is called as vital life. (a)
is used as a fertilizer. (a)
Nitrogen
a. Fertilizer
b. Respiration in living animals
c. Fire extinguisher
d. Refrigerator
Dry ice
a. Fertilizer
b. Respiration in living animals
c. Fire extinguisher
d. Refrigerator
Which of the following is known as azote?
a) Oxygen
b) Nitrogen
c) Sulpher
d) Carbon dioxide
Which of the following is true about oxygen?
a) Completely burning gas
b) Partially burning gas
c) Doesn’t support burning
d) Supports burning
______________ cells are specialised cells that can be transformed into any kind of cells.
a) Nerve
b) Stem
c) Heart
d) Bone
In the absence of oxygen, glucose is broken down in to ______________.
a) lactic acid
b) citric acid
c) acetic acid
d) nitric acid
The process of air passing in and out the lungs is called ______________.
a) inhalation
b) exhalation
c) breathing
d) None of these
The erythrocyte is placed in ______________solution which has lesser concentration of solutes and greater concentration of water than in the cytoplasm.
a) hypotonic
b) hypertonic
c) neutral
d) acidic
is the structural and functional unit of living organisms. (a)
Carbohydrates
a. CO2, water and heat
b. amino acid
c. glucose
d. Enzymes
The size of the cells are measured in units of ---------. (a)
_____________ is tough and thick white sheath that protects the inner parts of the eye.
a) Sclera
b) Conjunctiva
c) Cornea
d) Iris
