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WorksheetsSCIENCE 8
Total questions: 30
Worksheet time: 15mins
The weight of a body is 20kg. The weight is equal to
1960 N
196J
196 X 105 dyne
19.6 N
A coconut of mass 1kg falls from a tree. Find its weight?
10 N
1 Kg
1N
10 Kg
A constant force acts on a body of mass 10 kg and producean accleration of 0.2 ms-2, what is the fore?
20N
2N
10N
100N
Writing with chalk on board is possible because of
Non contact force
Gravitational force
Frictional force
Electrostatic force
Instrument used for measuring atmospheric pressure is
Manometer
Spring balance
Barometer
Mean balance
Leaves or fruits fall on the ground due to
Magnetic force
Gravitational force
Electrostatic force
Muscular force
New life comes from pre-existing life
True
False
Can Amoeba reproduce during uunfavourable condition
No
Yes
Fertilization is
Fusion of male gamete with the female sperm
Fusion of male gamete with the female egg
Fusion of male gametes only.
Fusion of female gametes only.
Sitting of the mother hen on eggs to keep them warm till the egg hatch is called
Hatchling
Parthenogenesis
Embryogenesis
Brooding
The path of the sperm in male is, selectt the most ap
Epididymis- Urinary bladder- Sperm duct- Prostrate gland- Urethra
Testis- sperm duct- seminal vesicles- epididymis- urethra- prostate glands
Testis- epididymis-spermduct-seminal vesicles- prostrate gland- urethra
Epididymis- spermduct- prostate gland- seminiferous tubule- urethra- testis.
Process of releasing of eggs from te ovary is called
Brooding
Hatchling
Gestation
Ovulation
Which of the following acts as a link between foetus and mother, for the supply of nutients
Endometrium
Fallopian tube
Umblical cord
None of the above
Which of the following statements are correct
In the zygote, half the nucleus comes from the father and half from the mother.
Zygote is the beginning of the formation of a new baby.
Fusion of sperm and egg inside the female takes place at fallopian tube.
The process of cloning was performed by Ian Wilmut
SI unit of Force
dyne
Newton
Pacal
ms-1
Force acts on an object may change
Direction
Shape
Speed
All of the above
When two forces act in opposite directions, then net force acting is the
Sum of two forces
Difference between two forces
Both of these
None of these
A container is filled with water as shown in the given figure. Which of the following statements is correct about pressure of water?
Pressure at A > Pressure at B > Pressure at C
Pressure at A = Pressure at B = Pressure at C
Pressure at A < Pressure at B > Pressure at C
Pressure at A < Pressure at B < Pressure at C
The pressure exeerted by a liquid
Decreases with depth
Increases with depth
No change with respect to depth
May increase or decrease
Force exerted by a normal human due to atmospheric pressure is
2 x 104 N
2 X 105 N
2 X 106 N
2 X 107N
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Only if the objects are solid.
Only if one of the two objects is liquid.
Only if one of the two objects is gaseous.
Irrespective of whether the objects are solid, liquid or gaseous.
It is difficult to walk on an oily floor because
There is more resistance
Force of friction is high
Force of friction is very less
Few children were asked to arrange forces due to rolling, static and sliding frictions in an increasing order. Their arrangements are given below. Choose the correct arrangement.
Rolling, Static, Sliding
Static, Rolling, Sliding
Rolling, Sliding, Static
Sliding, Static, Rolling
The sole of the shoes becomes plain after wearing it for several months. The reason is
Wearing out due to friction
Wearing out due to no friction
Sole is of bad quality
None of the above
Substances are called lubricants which are used to
Decrease friction
Increasee friction
Increase or decrease friction
None ot hte above
Select the incorrect statement
A polished surface will have less friction
Friction can be reduced by reducing sliding friction to rolling friction
Friction can be reduced to zero.
Fluid friction is also known as Drag.
Friction produces
Motion
Heat
Light
Force
V-belts are coated with _____ to add friction
Coolant
Mobil oil
Rosin
Graphite
Atmospheric pressure on the suface of sea level is
10 Pascal
10 kPascal
100 Pascal
100 kPascal
Mobil oil is used in scooters and bikes for which purpose?
As fuel
To increase the friction
To decrease the friction
To increase the cleaning tendency
