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CBSE - VIII
CBSE VIII - Science Solved Questions
Question 1
When two forces act along the same direction on an object, then the net force acting on the object is ____ of the two forces.
A) the average
B) less than the sum
C) greater than the sum
D) equal to the sum
Question 2
When we rub our palms together vigorously, they become warm because muscular energy is converted into heat energy due to the friction between the palms.A) True
B) False
Question 3
All animals including human beings communicate with sounds in the range of 20 Hz and 20,000 Hz.A) True
B) False
Question 4
A student prepared a tester using a compass needle for testing the conductivity of liquid samples. He then made the following observations:
(i) The deflection of the compass needle with sample A is 5 units
(ii) The deflection of the compass needle with sample B is 3 units
(iii) The deflection of the compass needle with sample C is 8 units
(iv) The deflection of the compass needle with sample D is 10 units
The liquid sample with the highest conductivity is ____.
A) sample A
B) sample B
C) sample C
D) sample D
Question 5
The weak points on the earth's crust, where the earthquakes are likely to occur, are called tectonic plates.A) True
B) False
Question 6
At the junction of the optic nerve and the retina, there are no sensory cells, so no vision is possible at that spot. This is called the ____ spot.A) white
B) black
C) blind
D) dead
Question 7
Which of the following celestial bodies appears to change its position with respect to the stars?A) The Earth
B) Constellations
C) The Milky way
D) Galaxies
Question 8
Which was the first synthetic fibre to be made entirely of chemicals?A) Nylon
B) Polyester
C) Rayon
D) Terylene
Question 9
Special refined kerosene oil is used as a fuel in ____.A) heavy vehicles
B) light vehicles
C) ships
D) aeroplanes
Question 10
Study of a nucleus is known as ____.A) neurology
B) radiology
C) karyology
D) rhinology
