CBSE Class 7 Science Multiple Choice Questions(MCQs)& Answers
1
When wind speed increases, air pressures
A
decreases
B
increases
C
remains constant
D
none of these
2
Soil formation is a
A
slow process
B
fast process
C
rapid process
D
none of these
3
Which soil horizon contains humus?
A
A-Horizon
B
B-Horizon
C
C-horizon
D
Bedrock
4
Which topsoil is best suited for growing plants
A
Sandy soil
B
Loamy Soil
C
Clayey Soil
D
None of these
5
Soil profile refers to an arrangement within a soil of
A
its horizontal layout
B
vertical layout
C
Size of soil particles
D
None of these
Answer: its horizontal layout
6
The water holding capacity is the highest in
A
sandy soil
B
clayey soil
C
loamy soil
D
mixture of sand and loam
7
In earthworm, the exchange of gases occurs through ________.
A
moist skin
B
lungs
C
gills
D
tracheae
8
Plants breathe through tiny pores in the leaves called ________.
A
stomata
B
pores
C
leaf blade
D
trachea
9
Organisms which respire in absence of air are called _________.
A
microbes
B
anaerobes
C
aerobes
D
none of these
10
Breathing is a ________ process while respiration is a _______ process.
A
physical, chemical
B
chemical, physical
C
physical, physical
D
chemical, chemical
Answer: physical, chemical
11
What is the heart rate of a normal adult human?
A
90-120 times per minute
B
70-80 times per minute
C
40-50 times per minute
D
10-20 times per minute
Answer: 70-80 times per minute
12
Phloem helps in the transport of _________ in plants.
A
food
B
water
C
minerals
D
carbon dioxide
13
Vascular tissues that transport water and nutrients in plants are called _________.
A
Veins
B
Phloem
C
Xylem
D
Root Hairs
14
The major excretory product in humans is ________
A
uric acid
B
ammonia
C
feaces
D
urea
15
Name the scientist who discovered blood circulation?
A
William Harvey
B
Isaac Newton
C
Christiaan Barnard
D
William Thomson
16
The filtering of blood through an artificial kidney is called ________
A
dialysis
B
diffusion
C
circulation
D
transportation
17
Upper chambers of a human heart are called?
A
atria
B
ventricles
C
pulmunory vein
D
vena cava
18
Which component of blood in mammals build up defense against harmful germs enter in the body?
A
WBCs
B
Platelets
C
RBCs
D
Plasma
19
The fluid part of the blood is called _______
A
Plasma
B
Haemoglobin
C
RBCs
D
WBCs
20
Name the pigment which gives red colour to the blood in mammals.
A
Haemoglobin
B
Globulin
C
Plasma
D
Platelets
21
The meter that is used to measure the distance moved by the vehicle is known as _____
A
Speedometer
B
Odometer
C
Chronometer
D
Ammeter
22
Amylase enzyme is present in
A
bile juice
B
saliva
C
gastric juice
D
pancreatic juice
23
Grass is rich in ________ a special kind of carbohydrate which can only be digested by ruminants.
A
Glucose
B
Cellulose
C
Sucrose
D
Fructose
24
An amoeba ingests food with the help of
A
Cilia
B
Tentacles
C
Pseudopedia
D
Buccal Cavity
25
Which of the following is not a part of nutrition?
A
digestion
B
absorption
C
assimilation
D
excretion
26
Which of the following is a ruminant?
A
buffalo
B
camel
C
goat
D
all of these
27
The inner walls of the small intestine have millions of small finger like projections called
A
villi
B
trachae
C
appendix
D
oesophagus
28
Which of the following MIGHT NOT tell a chemical change has taken place?
A
Converting liquid into gas
B
Production of heat
C
Evolution of gas.
D
Light is generated
Answer: Converting liquid into gas
29
Which of the following is NOT a physical property of a substance?
A
density
B
flammability
C
shape
D
color
30
Which of the following is a chemical change?
A
Cooking a vegetable
B
Freezing water into ice
C
Boiling of Water
D
Tearing of Newspaper
Answer: Cooking a vegetable
31
Which of the following is a physical change?
A
Heating of Iron
B
Burning of Wood
C
Rusting of Iron
D
Ripening of a fruit
32
Camouflage shown in polar bears is due to
A
white fur
B
thick fur
C
padded feet
D
two layers of fat
33
Water vapours present in the atmosphere is called
A
humidity
B
precipitation
C
climate
D
rain fall
34
In India, rainforests are found in which of the following state?
A
Assam
B
Andhra Pradesh
C
Madhya Pradesh
D
Kerala
35
Birds are adapted to fly because of ___________,
A
streamlined body
B
light bones
C
feathers and wings
D
all of these
36
Long Inactivity and metabolic depression of animals during winters is known as:
A
aestivation
B
migration
C
evolution
D
hibernation
37
In Western Ghats Of India, the Long tailed macaque is also known as _______
A
Indian Parrot
B
Beard Ape
C
Monkey
D
Lemurs
38
The special features and habits that help an animal survive in its environment are known as _______
A
evolutions
B
adaptations
C
polymorphisms
D
hibernation
39
Which of these is specifically an adaptation for cold climates?
A
thick fur
B
long ears
C
sweating glands
D
light bones
40
In addition to the rock particles, the soil contains
A
air and water
B
water and plants
C
minerals, organic matter, air and water
D
water, air and plants
Answer: minerals, organic matter, air and water
41
Which soil layer is made up of small lumps of rocks?
A
A-horizon
B
B-horizon
C
C-horizon
D
Bedrock
42
Toys, pots, and statues are made up of which soil type?
A
Sandy Soil
B
Clayey Soil
C
Loamy Soil
D
None of these
43
Lentils (masoor) and other pulses are grown in which of the following soil type?
A
Sandy Soil
B
Clayey Soil
C
Loamy Soil
D
None of these
44
Percolation rate of water is the least in ___________?
A
Sandy Soil
B
Clayey Soil
C
Loamy Soil
D
None of these
45
Which of the following soil type is loosely packed with large air spaces?
A
Sandy Soil
B
Clayey Soil
C
Loamy Soil
D
None of these
46
Find the odd one out.
A
Nasal Cavity
B
Nostrils
C
Pharynx
D
Trachea
47
Tiny air sacs of lungs are called ______.
A
alveoli
B
trachea
C
bronchi
D
larynx
48
Which of the following animal can breathe through skin as well through lungs?
A
frog
B
cockroach
C
fish
D
mammal
49
Which of the following is a scalar quantity?
A
Distance
B
Displacement
C
Velocity
D
Force
50
Which of the following relations is correct?
A
Speed = Distance × Time
B
Speed = Distance ÷ Time
C
Speed = Time ÷ Distance
D
Speed = 1/(Distance × Time)
Answer: Speed = Distance ÷ Time
51
The metallic ball in a pendulum is called as _______
A
Bob
B
Rod
C
Gong
D
Fork
52
The plant which traps and feeds on insects is:
A
cuscuta
B
china rose
C
pitcher plant
D
rose
53
Amarbel (Cuscuta) is an example of:
A
autotroph
B
parasite
C
saprotroph
D
host
54
Iodine used to detect presence of starch. It gives starch
A
red colour
B
green colour
C
blue-black colour
D
colourless appearance
Answer: blue-black colour
55
Which part of the plant gets carbon dioxide from the air for photosynthesis?
A
root hair
B
stomata
C
leaf veins
D
sepals
56
Rhizobium is an example of
A
Symbiosis
B
Parasites
C
Insectivorous
D
None of these
57
The tiny pores present in the leaves of the plants for exchange of gases are called _____
A
Stomata
B
Tracheae
C
Chloroplast
D
Spiracles
58
Green plants are:
A
herbivores
B
autotrophs
C
hetrotrophs
D
omnivores
59
Which of the following do not have teeth
(a)
(b)
(c) snakes
(d) elephants
A
rats
B
Donkey
C
birds
D
Goat
60
The walls of large intestine absorb
A
water
B
proteins
C
cellulose
D
roughage
61
Bile juice is stored in
A
liver
B
pancreas
C
gall bladder
D
stomach
62
The pointed teeth in the buccal cavity are called:
A
incisors
B
canines
C
premolars
D
molars
63
Which of the following is NOT an element of weather?
A
Humidity
B
Temperature
C
Soil
D
Rain
64
The eye of a cyclone is
A
cloudy and highly stormy.
B
full of strong winds.
C
calm and cloudless.
D
site with high atmospheric pressure.
Answer: calm and cloudless.
65
Equator is a region of _______ pressure while poles are regions of ______ pressure.
A
high, low
B
low, high
C
low, low
D
high, high
66
Which one of the following is NOT recommended during Lightening or thunderstorm?
A
Take Shelter in a bus or car.
B
In a forest, seek shelter in a low area under a thick growth of small trees.
C
Take shelter under isolated tree.
D
Get away from tractors and other metal farm equipment.
Answer: Take shelter under isolated tree.
67
With increase in temperature, atmospheric pressure ___________.
A
increases
B
decreases
C
remains constant
D
can decrease or increase
68
Which one of the following statement is INCORRECT?
A
When air gets heated, it expands.
B
when air gets cooled, it contracts.
C
The warm air is heavier than cold air.
D
Air moves from high pressure region to low pressure region.
Answer: The warm air is heavier than cold air.
69
What is the name given to the wind blowing from sea to land?
A
Thunderstorm
B
Land breeze
C
Sea breeze
D
cyclone
70
When we breathe out, exhaled air turns lime water into _______ due to presence of ________.
A
orange, oxygen
B
milky, oxygen
C
milky, carbon dioxide
D
milky, carbon monoxide
Answer: milky, carbon dioxide
71
Which of the following statements is NOT true?
A
Workers in wool industry generally suffer from Sorter’s disease.
B
Bakhrwal is an Indian breed of sheep.
C
Rayon is a natural fibre.
D
Shearing is usually done in summer season.
Answer: Rayon is a natural fibre.
72
Sericulture is ________________.
A
rearing of silk worms
B
rearing of sheep
C
cotton plantation
D
rearing of honey bees
Answer: rearing of silk worms
73
Removal of wool from a sheep is known as __________.
A
Rearing
B
Sorting
C
Shearing
D
Scouring
74
Which of the following process is NOT part of wool extraction?
A
Shearing
B
Scouring
C
Sorting
D
Reeling
75
Animal Fibres are made up of
A
cellulose
B
protein
C
nylon
D
rayon
76
Vegetable fibres are made up of
A
cellulose
B
nylon
C
protein
D
rayon
77
Which of the following is NOT a Vegetable fibre?
A
flax
B
silk
C
hemp
D
jute
78
Device used for measuring temperatures is called a
A
Barometer
B
Odometer
C
Thermometer
D
Speedometer
79
A polished silvery surface is
A
good absorber of heat
B
good reflector of heat
C
poor reflector of heat
D
None of these
Answer: good reflector of heat
80
Sea breeze is caused due to
A
conduction
B
convection
C
radiation
D
all of these
81
A wooden spoon is dipped in a cup of ice cream. Its other end
A
becomes cold by the process of conduction.
B
becomes cold by the process of convection.
C
becomes cold by the process of radiation.
D
does not become cold.
Answer: does not become cold.
82
Which of the following instrument measures time with the most accuracy?
A
mechanical clock with gears
B
quartz clock
C
sun dial
D
sand clock
83
Compact fluorescent lamps (CFLs) are considered better than ordinary electric bulbs because?
A
CFLs reduce wastage
B
CFLs can be fixed in the ordinary bulb holders.
C
both (a) and (b)
D
none of the above
84
Which of the following is the best option while considering the safety of household electric appliances?
A
We should use wire strip as fuses.
B
We should use non-ISI marked MCBs
C
We should use ISI marked MCBs
D
We should use conductors with high melting point in fuses.
Answer: We should use ISI marked MCBs
85
The strength of the magnetic field due to a solenoid can be increased by
A
decreasing the current strength in the solenoid
B
increasing the number of turns in the solenoid
C
by winding solenoid around a plastic rod
D
all of the above
Answer: increasing the number of turns in the solenoid
86
The magnetic effect of the current was discovered by ________?
A
Oersted
B
Ohm
C
Newton
D
Joule
87
Which of the following does not use magnetic effect of electric current?
A
electric fan
B
electric bulb
C
electric motor
D
refrigerator
88
Which of the following acts as safety device in electric appliances?
A
fuse
B
connecting wires
C
resistors
D
battery
89
Which of the following is an essential element in an electric circuit?
A
switch
B
connecting wires
C
voltmeter
D
ammeter
90
When an electric current passes through a solenoid, it acts as a/an
A
insulator
B
electric bell
C
resistor
D
bar magnet
91
The device used to make or break an electric circuit is:
A
Switch
B
Ammeter
C
Resistor
D
Battery
92
Primary colours (as per modern colorimetry) consists of
A
Cyan, Magenta, Yellow
B
Red, Green, Blue
C
Black, Yellow, White
D
Red, Yellow, Blue
93
When matter gets warmer, the atoms and molecules in that matter __________________
A
stand still
B
move faster
C
move slower
D
can’t say
94
Chemical name of Oil of Vitriol is __________
A
Nitric acid
B
Acetic acid
C
Sulphuric acid
D
Sodium Hydroxide
95
Sodium hydroxide is found in
A
Lemon
B
Soap
C
Oil of Vitriol
D
Table Salt
96
Lactic acid is found in
A
Curd
B
Apple
C
Soap
D
Lime
97
Acetic acid is found in
A
Curd
B
Spinach
C
Vinegar
D
Citrus fruits
98
Which of the following colours is given by phenolphthalein in a basic salt solution.
A
yellow
B
pink
C
orange red
D
colourless
99
The most commonly used natural indicator’ Litmus’ is extracted from
A
Lichens
B
Turmeric
C
Beet Root
D
China rose
100
Which of the following is a strong acid?
A
acetic acid
B
nitric acid
C
lactic acid
D
citric acid
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Categories: Science
Tags: CBSE, Class 7, Science
Question and Answers 