science MCQs quiz test questions with answers.test=3

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science MCQs quiz test questions with answers

1 tonne = _____ kg


(A) 40
(B) 100
(C) 400
(D) 1000

answer : (D) 1000
1 tonne is equal to 1000 kilogram.


Which instrument is used to measure humidity?


(A) Barometer
(B) Hydrometer
(C) Hygrometer
(D) Galvanometer

answer : (C) Hygrometer
The scientific instrument hygrometer is used to measure humidity or amount of water vapor in the air.


Laser was invented by


(A) Alessandro Volta
(B) Hero of Alexandria
(C) Theodore Maiman
(D) William Sturgeon

answer : (C) Theodore Maiman
Laser was invented by American engineer and physicist Theodore Maiman in 1960.


Which component of the body works as an energy storage device?


(A) Fats
(B) Skin
(C) Liver
(D) Proteins

answer : (A) Fats
Fats in the body works as an energy storage device for the body.


The science of lightning is called


(A) Aerology
(B) Meteorology
(C) Electeorology
(D) Fulminology

answer : (D) Fulminology
Fulminology is the science (or concerned with the study) of lightning.

Which of the following is NOT true about Helium gas?


(A) It is colorless
(B) It is odorless
(C) It is tasteless
(D) It is toxic

answer : (D) It is toxic
Helium gas is colorless, odorless, and tasteless. But it is not toxic.


Without the greenhouse effect what would the average temperature on Earth be?


(A) Above 0°
(B) Below 0° C
(C) Exactly 0° C

answer : (B) Below 0° C
Without the greenhouse effect the average temperature on the Earth would be very cold even below zero degree centigrade.


An antibiotic substance “penicillin” was discovered by ____ who was a ____ scientist.


(A) Alfred Nobel, Russian
(B) Alexander Fleming, Russian
(C) Alfred Nobel, Scottish
(D) Alexander Fleming, Scottish

answer : (D) Alexander Fleming, Scottish
The antibiotic substance “penicillin” was discovered in 1928 by a Scottish scientist Alexander Fleming.


“Quartz” is a mineral composed of ____ and Oxygen.


(A) Aluminum
(B) Carbon
(C) Silicon
(D) Granite

answer : (C) Silicon
Quartz is composed of Silicon and Oxygen.


“Coal” is an important fossil fuel. It is formed by the remains of


(A) plasma
(B) rocks
(C) animals
(D) plants

answer : (D) plants
Coal is formed by the remains of plants.

Ocean currents refers to the directional movement of


(A) ships
(B) charge
(C) electrodes
(D) seawater

answer : (D) seawater


What on the Earth stores heat from the Sun?


(A) Mountains
(B) Deserts
(C) Forests
(D) Oceans

answer : (D) Oceans


Ozone depletion in the upper atmosphere caused by the release of gases


(A) Helium
(B) Neon
(C) Hydrogen and Nitrogen
(D) Chlorine and Bromine

answer : (D) Chlorine and Bromine
Ozone depletion in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine and bromine from industry and other human activities.


What is the name of the strongest layer of the heart wall?


(A) Myocardium
(B) Epicardium
(C) Endocardium
(D) Cardiomyocyte

answer : (A) Myocardium
The middle layer of the heart wall, Myocardium, is the strongest layer.


Which part of the eye plays vital role in the vision?


(A) Choroid
(B) Retina
(C) Iris
(D) Cornea

answer : (B) Retina
Retina plays vital role in the vision and damage to it can cause blindness.

Which part of the eye is most sensitive to the light?


(A) Choroid
(B) Retina
(C) Iris
(D) Cornea

answer : (B) Retina
The most sensitive to light part of human eye is Retina.



How much time sunlight takes to reach the Earth?


(A) 4 minutes and 20 seconds
(B) 6 minutes and 20 seconds
(C) 8 minutes and 20 seconds
(D) 10 minutes and 20 seconds

answer : (C) 8 minutes and 20 seconds
Sunlight takes about 8 minutes and 20 seconds to travel the average distance from the surface of the Sun to the Earth.



What is the speed of light in vacuum?


(A) 270,000 km/s
(B) 280,000 km/s
(C) 290,000 km/s
(D) 300,000 km/s

answer : (D) 300,000 km/s
The speed of light in vacuum is 300,000 km/s.


In a boiling pot of water, heat transfers from bottom to the surface of water. This is an example of


(A) conduction
(B) radiation
(C) convection
(D) none of these

answer : (C) convection
Convection is the transfer of heat through the movement of liquids or gases.


The Earth receives energy from the sun through


(A) conduction
(B) radiation
(C) diffusion
(D) convection

answer : (B) radiation
The earth receives energy from the sun in the form of radiation.

Our world (Earth) was formed about _____ years ago.


(A) 4.5 million
(B) 5.5 million
(C) 4.5 billion
(D) 5.5 billion

answer : (C) 4.5 billion
According to the scientists, the Earth was formed about 4.5 billion years ago.