Explore topic-wise MCQs in Science.

This section includes 1357 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.

1.

Petroleum and natural gas are generally formed from the remains of

A. birds
B. sea organisms
C. mammals
D. plants
Answer» C. mammals
2.

Energy is released from the fossil fuels when they are

A. cooled
B. burned
C. pressurized
D. sterilized
Answer» C. pressurized
3.

The solid part of Earth mostly contains the

A. minerals
B. soil
C. magma
D. rocks
Answer» B. soil
4.

The only by-product of fuel cell is

A. acid
B. water
C. gas
D. neutral chemicals
Answer» C. gas
5.

The radioactive waste is generally treated by

A. ammonia to neutralize it
B. bacteria to consume it
C. storage until it gets harmless
D. acid to decompose it
Answer» D. acid to decompose it
6.

Streams takes sorted material and deposit it in to a broad area called

A. island
B. plain
C. coast
D. outwash plain
Answer» E.
7.

When a melting glacier deposit unsorted materials it is called a

A. glacial drift
B. till
C. stratified drift
D. moraines
Answer» C. stratified drift
8.

Jagged ridges which are formed due to cutting of several mountains is called

A. horns
B. cirques
C. Ar?tes
D. hanging valleys
Answer» D. hanging valleys
9.

The maximum steep angel which will not let material slide down slope is called

A. angle of mountain
B. angle of repose
C. angle of slide
D. complex angle
Answer» C. angle of slide
10.

When a material fall over a curved surface there is appearance of

A. kettle
B. slumping
C. sliding
D. breaking
Answer» C. sliding
11.

The process of increasing soil acidity is called

A. acidification
B. acid shock
C. alkalinity
D. acid precipitation
Answer» B. acid shock
12.

The burning of fossils fuel lead to production of

A. Sulphur dioxide
B. nitrogen dioxide
C. both a and b
D. carbon dioxide
Answer» D. carbon dioxide
13.

Pressure belts are found after every 30° of

A. pressure belts
B. convection cells
C. latitude
D. longitude
Answer» D. longitude
14.

As the altitude increases the temperature of troposphere

A. decreases
B. increases
C. remains same
D. elevates
Answer» B. increases
15.

The percentage of nitrogen in air is equal to

A. -0.12
B. 0.21
C. 0.01
D. 0.05
Answer» C. 0.01
16.

Acid precipitation and smog is formed with vehicle exhaust which contains

A. oxygen
B. nitrogen
C. carbon dioxide
D. ammonia
Answer» C. carbon dioxide
17.

Smog levels in Los Angeles in winter are very

A. high
B. low
C. same
D. constant
Answer» C. same
18.

The lowest layer of the atmosphere is called

A. troposphere
B. stratosphere
C. mesosphere
D. thermosphere
Answer» B. stratosphere
19.

The middle layer of the atmosphere is called

A. troposphere
B. stratosphere
C. mesosphere
D. thermosphere
Answer» D. thermosphere
20.

The earth's atmosphere is divided in to layers on the basis of

A. weight
B. pressure
C. temperature
D. energy
Answer» D. energy
21.

The air which creates area of low pressure is

A. colder
B. less dense
C. more dense
D. coldest
Answer» D. coldest
22.

In 1992 the hurricane named Andrew was the most destructive and winds reached up to

A. 164km/h
B. 264km/h
C. 624km/h
D. 426km/h
Answer» C. 624km/h
23.

A device used to remove pollutant from car exhaust is called

A. scrubber
B. catalytic converter
C. stacker
D. hybrid
Answer» C. stacker
24.

The circular patterns through which air moves is called

A. pressure belts
B. convection cells
C. latitude
D. longitude
Answer» C. latitude
25.

Polar regions receiving solar energy more as compare to

A. tropic of cancer
B. tropic of Capricorn
C. equator
D. medium zone
Answer» D. medium zone
26.

To represent Earth's features, topographic maps use

A. solid lines
B. dotted lines
C. colors
D. shades
Answer» D. shades
27.

Waves of energy are sent from satellite of the area being observed to the

A. Radar
B. Ground
C. Station
D. Computer
Answer» C. Station
28.

A computerized system that allows users to enter different types of information about an area is known as

A. GPS
B. GIS
C. Navigator
D. Map
Answer» C. Navigator
29.

The compass needle points to the magnetic pole i.e.

A. south pole
B. north pole
C. east pole
D. west pole
Answer» C. east pole
30.

A circle halfway between the north and south pole that divides the Earth into Northern and Southern Hemispheres is known as

A. Tropic
B. Chord
C. Diameter
D. Equator
Answer» E.
31.

The SI unit of length is

A. miles
B. meters
C. yards
D. feet
Answer» C. yards
32.

John Trefry is a famous oceanographer who studies the ocean floor in a mini-submarine known as

A. Alvin
B. Bass
C. Barracuda
D. Turtle
Answer» B. Bass
33.

If a water in the measuring cylinder measures 60mL and it rises to 70mL when a stone is added. The volume of the stone is

A. 1cm3
B. 10cm3
C. 1003
D. 1m3
Answer» C. 1003
34.

To measure temperature, scientists use the unit

A. Kelvin (K)
B. Celsius ( °C)
C. Fahrenheit (°F)
D. Rankine (°R)
Answer» C. Fahrenheit (°F)
35.

Mathematical models provide

A. estimated results
B. accurate results
C. wrong results
D. approximate results
Answer» B. accurate results
36.

The major example of earthquake is The San Andreas Fault Zone which is present in

A. Canada
B. California
C. Japan
D. China
Answer» C. Japan
37.

The degree of earthquake felt and its damage is called its

A. intensity
B. consistency
C. magnitude
D. power
Answer» B. consistency
38.

The shock absorbers in earthquake resistant building is called

A. base isolator
B. mass damper
C. cross braces
D. flexible pipes
Answer» B. mass damper
39.

Earthquake intensity is measure by help of

A. seismograph
B. seismogram
C. Richter scale
D. modified Mercalli scale
Answer» E.
40.

Forecasting an earthquake based on hypothesis that sections of active faults may have strong earthquakes although there existed no record of previous earthquake is

A. gap prediction
B. gap hypothesis
C. seismic waves
D. seismic gap
Answer» C. seismic waves
41.

Minerals contain maximum of

A. 90 naturally occurring elements
B. 92 naturally occurring elements
C. 94 naturally occurring elements
D. 96 naturally occurring elements
Answer» C. 94 naturally occurring elements
42.

A crystal's shape is determined by the

A. position of atoms
B. arrangement of atoms
C. vibration of atoms
D. collision of atoms
Answer» C. vibration of atoms
43.

To determine the hardness of a mineral, scientists use

A. Perl's scale
B. Richter scale
C. Mohs hardness scale
D. Andy's proficient hardness testing scale
Answer» D. Andy's proficient hardness testing scale
44.

Quarries are generally

A. open pits
B. surface coal mines
C. underground mines
D. explosive mines
Answer» B. surface coal mines
45.

It is better to identify a mineral by using its

A. color
B. density
C. streak
D. shade
Answer» D. shade
46.

The water which flows on top of ocean is

A. more dense
B. less dense
C. coldest
D. hottest
Answer» C. coldest
47.

Movements of ocean water which is stream like and exist below the surface is called

A. surface zone
B. surface current
C. deep current
D. medium zone
Answer» D. medium zone
48.

The factor which influence density of ocean water includes

A. temperature
B. volume
C. acidity
D. alkalinity
Answer» B. volume
49.

Coriolis effect cause surface currents to turn anticlockwise in

A. Southern Hemisphere
B. Northern Hemisphere
C. Eastern Hemisphere
D. Western Hemisphere
Answer» B. Northern Hemisphere
50.

In polar regions the molecules of water are

A. closer
B. apart
C. bounced
D. repelled
Answer» B. apart