1. Female anopheles
mosquitoes sucking human blood at intervals are:
a.
Permanent parasite
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b.
Endoparasites
c. Intermittent
parasites
d.
Hemiparasites
2. Organisms sharing a
common environment belong to same:
a. Community
b.
Genus
c.
Species
d.
Population
3. A prey population
can weaken the search image of its predator by being:
a.
Polymorphic
b.
Conspicuous
c. in
a clumped pattern of dispersion
d.
all the same size and
colour
4.
Kilowatt hour (kWh) represents the unit of
a.
power
b.
impulse
c.
momentum
d.
none of these
5.
A body moves through a
distance of 3 m in the following different ways. In which case is the maximum
work done?
a.
When pushed over an
inclined plane.
b. When
lifted vertically upward.
c.
When pushed over
smooth rollers.
d.
When pushed on a plane
horizontal surface.
6.
A wound watch spring
has _____ energy.
a.
Mechanical
b.
Kinetic
c.
Potential
d.
Kinetic and potential
7.
When the time taken to
complete a given amount of work increases, then,
a.
power increases
b. power
decreases
c.
energy increases
d.
energy decreases
8.
The moon revolves
around the earth because the earth exerts a radial force on the moon. Does this
perform work on the moon?
a. No
b.
Yes, sometimes
c.
Yes, always
d.
Cannot be decided
9.
The Kinetic Energy. of
a body is increased most by doubling its
a.
mass
b.
weight
c. speed
d.
density
10.
A lifts a doll from
the floor and places it on a table. If the weight of the doll is known,
what else does one need to know in order to calculate the work A has done on
the doll?
a.
The time required
b. Height
of the table
c.
Mass of the ball
d.
Cost of the doll or
the table
11.
The unit of power is
a.
watt per second
b.
jou1e
c.
kilo joule
d.
watt
12.
A raised hammer posses
a.
K.E. only
b. gravitational
P.E.
c.
electrical
energy
d.
sound energy
13.
With the increase in
temperature, the density of a substance, in general,
a.
Increases
b. Decreases
c.
First increase then
decreases
d.
First decrease then
increases
14.
The normal temperature
of the human body is
a. 37°C
b.
98°C
c.
368K
d.
none of these
15.
A circular disc of
copper has a symmetrical hole at its centre. The disc is
uniformly heated. The diameter of the hole will
uniformly heated. The diameter of the hole will
a. Increase
b.
Decrease
c.
Remain the same
d.
Become indeterminate
16.
When water is heated
from 0°C, its volume
a.
Increases
b. decreases
till 4°C
c.
remains the same
d.
first increases then
decreases
17.
The most commonly used
thermometric substance is
a.
Water
b.
Alcohol
c. Mercury
d.
None of these
18.
In summer, the
mechanical clocks
a. become
slow
b.
become fast
c.
gives correct
time
d.
lose time
19.
Glaciers always melt
at the __________ first.
a.
top surface
b.
sides
c. bottom
d.
middle surface
20.
When air is saturated,
it cannot hold
a. more
water vapour
b.
more air
c.
more carbon
dioxide
d.
more oxygen
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