Physics ICSE Class 6 Important Questions Science and its Importance
Practice Questions
Question 1.
What do you understand by the term ‘physics’ ?
Answer:
Physics is the branch of science that deals with the study of matter, energy and their interactions.
Question 2.
Name few fields where physics has given its contribution.
Answer:
- Transport – Laws of mechanics helped develop modes of transport like car, ships, etc.
- Communication – Internet, phones, TV, computers, satellites, etc are contribution of physics.
- Electricity
- Space exploration
Question 3.
What are harmful effects of science ?
Answer:
- Pollution
- Climate change (Imbalance in nature)
- Development of weapons of mass destruction.
Question 4.
Name the branch of science which deals with the study of –
- composition of matter
- animals
- physical structure of the earth
- atmosphere and weather
- motion of objects
- behaviour of light
- atomic nuclei
- heat
- electricity and magnetism
Answer:
- Chemistry
- Zoology
- geography
- meteorology
- mechanics
- optics
- nuclear physics
- thermodynamics
- electromagnetism
Knowledge Based Questions
A. Tick the most appropriate answer.
Question 1.
Technology is
a. discovering new scientific principles …………………
b. helping scientists carry out experiments to verify scientific principles.
c. using scientific principles to develop new and useful things.
d. using already discovered scientific principles to discover newer principles.
Answer:
c. using scientific principles to develop new and useful things.
Question 2.
The first step in solving a problem using the scientific method is ………………
a. collecting information.
b. making a hypothesis.
c. testing the hypothesis.
d. stating the problem clearly.
Answer:
d. stating the problem clearly.
Question 3.
A hypothesis is a …………………..
a. collection of related problems.
b. possible explanation of a problem.
c. correct explanation of a problem.
d. rejected explanation of a problem.
Answer:
b. possible explanation of a problem.
Question 4.
Discoveries and inventions are made by a ………………….
a. judge.
b. principal
c. scientist.
d. historian.
Answer:
c. scientist.
Question 5.
Usage of scientific methods by the farmers has led to a better production of …………………
а. clothes.
b. crops.
c. houses.
d. none of these
Answer:
b. crops.
Question б.
A device by which we can see a cricket match is the ……………….
a. radio.
b. radar.
c. television.
d. transistor.
Answer:
c. television.
Question 7.
Discovery of the nuclear bomb has resulted in the ………………
a. quick progress.
b. danger of a nuclear war
c. immediate peace.
d. none of these
Answer:
b. danger of a nuclear war
B. Fill in the blanks.
Question 1.
Science is the systematic knowledge gained by man through ………….. and …………..
Answer:
Science is the systematic knowledge gained by man through observation and experimentation.
Question 2.
The word Physics is taken from the Greek word ………………….
Answer:
The word Physics is taken from the Greek word Physikos.
Question 3.
Once a hypothesis is proved to be correct, it becomes a ……………
Answer:
Once a hypothesis is proved to be correct, it becomes a law or theory
Question 4.
Discovery of ……………… has made communication much more easier and faster.
Answer:
Discovery of electromagnetic waves has made communication much more easier and faster.
Question 5
……………… are used for forecasting weather.
Answer:
Satellites are used for forecasting weather..
C. Write true or false for each statement. Rewrite the false statements correctly.
Question 1.
Radar is developed by understanding the principle of optics.
Answer:
False.
Correct : Radar is developed by understanding the principle of electromagnetic waves.
Question 2.
Nuclear radiations pose the biggest health hazard.
Answer:
True
Question 3.
We study the reference material to work out a hypothesis.
Answer:
True
Question 4.
We measure the temperature of a substance with a barometer.
Answer:
False.
Correct : We measure the temperature of a substance with a thermometer.
Question 5.
The hypothesis proved correct is generalised into a law or theory.
Answer:
True
Question 6.
Scientists find applications of the scientific theory useful to mankind.
Answer:
True
Question 7.
A doctor uses scientific methods to diagnose illness and treat patients.
Answer:
True
D. Find the odd-one out. Give reasons for your’ choice.
Question 1.
Physics, History, Chemistry, Botany
Answer:
History
Correct : Not a part of science
Question 2.
telescope, microscope, spectacles, thermometer
Answer:
thermometer
Correct : others deal with optics or light but it deals with measurement of heat.
Question 3.
radio, radar, washing machine, television
Answer:
washing machine
Correct : other are used for making communication easier and faster.
E. Give reasons for the following.
Question 1.
The library and the laboratory are helpful in providing scientific aids.
Answer:
Library helps one in research work over a particular aspect while laboratory is the place where one can conduct experiments under controlled conditions and thus helpful as scientific aids.
Question 2.
Scientists try to find useful applications of the theory.
Answer:
Scientists being well-versed with the theory, make use of it practically and make life comfortable and easy.
Question 3.
Invention of television has been beneficial to mankind.
Answer:
Television has become a source of communication and provides us with latest information even of far off places within seconds and hence has been proved beneficial to mankind.
F. Write short answers.
Question 1.
When docs a hypothesis become a theory ?
Answer:
If the data collected by experimentation, conclusion and generalisation of a problem agrees with hypothesis stated, it becomes a theory or law.
Question 2.
Mention the steps involved in the scientific method.
Answer:
- Identification of the problem
- Collection of basic information
- Working out a hypothesis
- Experimentation and observation
- Conclusion and generalisation
- Application
Question 3.
Name any three modes of communication which are used these days.
Answer:
- Radar
- Radio
- Television
Question 4.
Name any three modes of transport which help us to travel fast. Which one is the fastest among them ?
Answer:
- Land via vehicles and cars, trains, bus etc.
- Water via ships
- Air via aeroplane and helicopters
The transportation by air is the fastest mode.
G Answer in detail.
Question 1.
How is physics important to us ?
Answer:
Physics is a foundation of modern technology. The different technical devices developed are based on the law of nature, stated and studied by physicists, e.g. Health, communication, transport, energy.
Question 2.
What are the ill-effects of science ?
Answer:
ill-effects of Science :
- Because of scientific progress life has become so fast-paced that everyone is more busy and tense.
- Incidence of high blood pressure and heart attacks have increased.
- Scientific progress has caused an imbalance in nature.
- The weapons of mass destruction created with the help of science may completely wipe out the human race.
ICSE Class 6 Physics Important Questions