a) silver discovered by_______ .
b) endocrine glands are______.
c) The _____forest is the home of the Asiatic lion in India.
d) An ideal fuel has a ____calorific value.
e) We cannot hear the sound above____Hz, and they are called ____ .
f) The image of an object in the eye is formed on the ____ .
g) The atmospheric pressure supports approximately____mm of a Mercury column
h) The intensity of the earthquake is measured on the ____scale.
i) Sound can be produced by _____and it cannot travel in ____ .
j) Hormones are secreted directly into the______ .
k) The earth pulls all objects towards itself. This pull is called___.
2) Name the following: (Answer any eight): (1 x 8)= 8
a) Name the structure which helps in photosynthesis.
b) The disease caused due to iodine deficiency resulting in thyroxine deficiency.
c) Two vulnerable species in India.
d) Name the hottest part in the flame of the candle.
e) name the unit in which the calorific value of a fuel is expressed.
f) The maximum displacement of the vibrating body on any one side of the mean position.
g) The condition of eye when the lens becomes opaque and cloudy and the vision is impaired.
h) Name the instrument used to measure the air pressure.
i) Name the instrument by which earthquakes are recorded.
j) Science of studying earthquakes is called?
3) Choose the correct option/s in each: (Answer any 7) (1 x7)= 7
a) Vacuoles in plant cells
i) produce energy for the cell
ii) help in the removal of water
iii) protect the cell iv) store food
b) Development of the foetus in human females takes place in the
i) ovary ii) uterus iii) oviduct iv) placenta
c) The animals living natural in a particular habitats are called
i) flora ii) endangered species
iii) fauna iv) endemic species
d) This zone is also called the zone of combusion
i) the thin outer zone
ii) The luminous middle zone
iii) the dark innermost zone
iv) the blue bottom zone
e) Musical instruments can be played at different pitches by changing the ___of its string.
i) length ii) tightness iii) thickness iv) all the above
f) Which instrument is based on the principle of multiple reflection ?
i) telescope ii) microscope iii) kaleidoscope iv) all of these
g) What is the sum of all forces acting on a body called ?
i) Balanced force ii) gravity iii) speed iv) resultant force
h) Some of the areas in India which are earthquake prone are
i) North-east b) Rajasthan iii) parts of Gujarat iv) all the above
4) Change one word to make the sentence true: (Answer any five): (1 x5)= 5
a) The smallest cell in the human body is the nerve cell.
b) Pancreas is present at the base of the brain.
c) A combustible substance always is a fuel.
d) The sound of the drum has a lower frequency than the sound of violin.
e) Choroid is the responsible for the colour of the eye ?
f) The atmospheric pressure on the top of Mount Everest is less than atmospheric pressure at sea level in Mumbai.
5) Difference between: (Any five): (2 x5)= 10
a) prokaryotes/eukaryotes
b) Sexual reproduction/ asexual reproduction.
c) Hunting/ Poaching.
d) Gaseous fuels/ Solid fuels.
e) Infrasonic/ Ultrasonic sound
f) yellow spot/ blind spot
6) Write the function of the following:(Answer any two): (2.5 x2)= 5
a) Chloroplast in a plant.
b) Red Data Book.
c) aqueous and vitreous humour.
7) Define the followings: (Any three) (2 x3)= 6
a) Fertilization.
b) Biodiversity.
c) spectrum.
d) resultant force.
8) Reason behind Questions: (Any four) (2 x4)= 8
a) Why sodium is kept under the kerosene oil ?
b) The loudness of a lion's roar is much greater than a bird's chirp ?
c) Why vision in a human eye gets hampered due to cataract?
d) Why does body weight less on the moon ?
e) Why is a cell called the basic structural unit of life?
9) Write the function of : (any one): (1 x 2)= 2
a) Iris in a human eye.
b) Nucleus.
10) Answer the following: (Any three) : (2 x2)= 4
a) What are the conditions necessary for combustion.
b) What is the SI unit of frequency.
c) What are the basic properties of charge?
d) What is the similarity between electrostatic and magnetic force.
Answer any five : (2 x5)= 10
11) Write the laws of Reflection. (2)
12) When a glass rod is rubbed with silk, the glass rod gets positive charge, why ? (2)
13) What causes friction? (2)
14)a) How is hypermetropia corrected ? (2)
b) A body vibrates 12 times in 4 seconds. What is the frequency of vibration ? (2)
15) What is the cell wall in plant cells made of and what is its function? (2)
16) Match the Following: (5)
i) butterfly
ii) supporter of combustion
iii) monometer
iv) presence of charge
v) cellulose
a) Complex carbohydrates
b) Electroscope
c) metamorphosis
d) Oxygen
e) fluid
f) microscope
g) specimens
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