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Worksheetsclass 8 half yearly
Total questions: 35
Worksheet time: 19mins
which of the following tool is not used in the preperation of soil
plough
hoe
combine
cultivator
the process of transferring the seedlings from the nursery to the main feild by hand is called _________ or ____________
growing, transplanting
copy, paste
transplanting, transplantation
none
full form of NPK fertilisers
nitrogen potassium phosphorus
nitrogen phosphorus potassium
national plantation preservation
none
what is the other name for moat
dhekli
rahat
lever system
chain pump
pulley system
who are the friends of the farmer
insect
birds
worms
weeds
About 5000 years ago, small, thin pieces of ___________dipped in__________ at one end, were used as matchsticks in ancient Egypt
pinewood, sulphur
soft wood, sulphur dioxide
hard wood, sulphur monoxide
all the mammles are viviparous animals
true with exeptions
false with exeptions
true in all cases
false in all cases
all insects, birds and reptiles are oviparous animals
true with exeptions
false with exeptions
true in all
false in all
which of the following is the life cycle of a silkmoth
egg- caterpillar- pupa- silkmoth
eggs- larva- chrysalis- adult silkmoth
egg-tadpole-silkmoth
egg-larva-silkmoth
how many days does the embryo of the hen's egg take to become a fully formed chick
10 days
21 days
3 weeks
1 week
what do we mean by vivi in viviparous
alive
direct
normal
death
which of the following is a common pubertal change (boys/girls)
hair growth on the face
body becomes muscular
high pitched voice
rapid increase in height
the bulge (or projection) at the front of throat or neck in grown up boys is called
adam's apple
newton's apple
adam's melon
newton' melon
what are the oil glands called
sebaceous gland
sabecaous gland
sweat gland
endocrine gland
The period of maturity of reproductive organs is called.
Adolescene period
Mensuration
Gestation period
None of these
Puberty in females begins at the age of _____.
11 to 13 years
16 to 18 years
14 to 16 years
18 to 21 years
the strength of a force is expressed by its
magnitude
newton
pascle
none
the english scientist _______________had given the idea for gravitational force when he saw an apple fall from a tree
isaac newton
pascal newton
charles newton
a group of farmers who named there group as "the newtons"
pressure=
force x area
force
area
area
force
n
m2
pa
less/more
less the area _______ the pressure..
more the area ______the pressure..
more, less
less, more
depends on the situation , more
more, depends on the situation
magnetic force is a
contact force
non contact force
friction arrises due to ____________in the surfaces of object
irregularities
regularities
the maximum frictional force present between any 2 objectts when one object tends to move or slip over the surface of the other object, is call _______________ friction
static
sliding
rolling
when an object rolls over a surface of another object, the resistance to its motion is called _________ friction
rolling
static
sliding
the frictional force preseent when one object moves slowly over the surface of another, is called ____________ friction
static
sliding
rolling
friction is a friend and a foe
true
false
voice of which of the following is likely to have the minimum frequency
baby girl
baby boy
a man
a woman
which of the following vibrates when a musical note is produced by the cymbals in an orchestra
streched string
streched membranes
metal plates
air column
sound travels the fastest through
solid
liquid
gas
all equal
sound needs a medium of propogation
true
false
sound travels the slowest in
solid
liquid
gas
all equal
