Questions :-
1. What is unpleasant sound called?
(a) Noise
(b) Sweet sound
(c) Both
(d) None of these
2. Presence of unwanted and excessive sound in the environment produces _______________
(a) Air pollution
(b) Water pollution
(c) Sound pollution
(d) None of these
3. How many parts have human ear?
(a) Two
(b) Three
(c) Four
(d) One
4. What is the frequency range of inaudible sound?
(a) Less than 20 Hz
(b) 20 Hz
(c) 20 – 20,000...
Questions :-
1. In humans, sound is produced by _______________
(a) Voice box
(b) Music box
(c) Juke box
(d) None of these
2. Name the form of energy that is produced by producing vibration in an object.
(a) Wave
(b) Sound
(c) Heat
(d) None of these
3. __________ cannot move through vacuum.
(a) Wave
(b) Sound
(c) Heat
(d) None of these
4. Sound waves are _______________ waves.
(a) Longitudinal waves
(b) Transverse waves
(c) Bot...
Questions :-
1. Which of the following surface have greater friction?
(a) Smooth surface
(b) Rough surface
(c) Curved surface
(d) None of these
2. Friction is reduced by __________
(a) Ball bearings
(b) Glass
(c) Both of these
(d) None of these
3. Friction force depends upon ____________ of the fluid.
(a) Shape
(b) Size
(c) Shape and size both
(d) None of these
4. Friction is a/an __________
(a) Evil
(b) Foe
(c) Evil and foe b...
Questions :-
1. Friction is an example of ___________
(a) Contact force
(b) Non – contact force
(c) Both of these
(d) None of these
2. The direction of force of friction is always ______________ to the direction of motion.
(a) Same
(b) Opposite
(c) Unchanged
(d) None of these
3. When one body rolls over the surface of another body, the resistance to its motion is called ____________
(a) Rolling friction
(b) Sliding friction
(c) Fluid f...
Questions :-
1. The force applied between two charged bodies is called
(a) Electrostatic force
(b) Magnetic force
(c) Muscular force
(d) None of these
2. If the force is applied in any object then the object may change their ___________
(a) Direction
(b) Shape
(c) Both of these
(d) None of these
3. When two forces are acting in opposite direction then net force applied is equal to ___________
(a) Sum of the two forces
(b) Difference o...
Questions :-
1. A push or pull on an object is called ________________
(a) Force
(b) Pressure
(c) Density
(d) None of these
2. The strength of a force is usually expressed by its __________
(a) Pressure
(b) Density
(c) Magnitude
(d) None of these
3. The force resulting due to the action of muscles is known as ____________
(a) Electrostatic force
(b) Magnetic force
(c) Muscular force
(d) None of these
4. The force exerted by a charge...
Questions :-
1. Metamorphosis in insects is controlled by __________
(a) Growth hormone
(b) Insect hormone
(c) Both of these
(d) None of these
2. Fertilisation is called _________
(a) To produce sperm
(b) To produce egg
(c) Fusion of sperms and eggs
(d) None of these
3. Puberty age in female is ___________
(a) 10 – 12 age
(b) 12 – 14 age
(c) 8 – 10 age
(d) None of these
4. The first menstrual flow begins at puberty and is termed __...
Question :-
1. Time period when the body undergoes changes to reach reproductive maturity is known as ___________
(a) Adolescence
(b) Puberty
(c) Hormones
(d) None of these
2. The various changes that occur in the body during adolescence marks the onset of _______________
(a) Adolescence
(b) Puberty
(c) Hormones
(d) None of these
3. The growing voice box in boys can be seen as a protruding part of the throat called ____________
(a) Adoles...
Questions :-
1. The transformation of the larva into an adult through drastic changes is called ___________
(a) Metamorphosis
(b) Metamorphic
(c) Fusion
(d) None of these
2. Name the type of reproduction in which only a single parent is involved.
(a) Fertilisation
(b) Sexual reproduction
(c) Asexual reproduction
(d) None of these
3. Name the method of reproduction in which new individuals develops from buds.
(a) Fertilisation
(b) Buddi...
Questions :-
1. Reproduction starting from fusion of male and female gametes is called ___________
(a) Asexual reproduction
(b) Sexual reproduction
(c) Fertilisation
(d) None of these
2. Name the process of fusion of male and female gametes (egg and sperm) to form zygote.
(a) Asexual reproduction
(b) Sexual reproduction
(c) Fertilisation
(d) None of these
3. Fertilisation which takes place inside the female body is called __________
(a) I...