Multiple Choice Questions (1 Mark Each)
1. What is the first step of scientific
learning?
a) Hypothesis building b)
Result and conclusion
c) Observation/Curiosity/Questioning d) Reporting
2. Biology is the field of science that
specifically studies:
a) Matter and energy b) Living beings and life processes
c) Stars and the universe d) The structure of the Earth
3. How is the number 0.000024 expressed
correctly in scientific notation?
a) 2.4×10 −6 b)
24×10 −5
c) 2.4×10 −5 d) 0.24×10 −6
4. What is the value of the metric prefix
"Giga"?
a) 106 b) 109
c) 1012 d) 1010
5. The smallest quantity that can be
measured from any instrument is called its:
a) Average b)
Scientific notation
c) Measurement error d) Least count
6. In scientific notation, the base is
always:
a) 1 b)
5
c) 10 d)
100
7. What is the least count of a standard
scale divided into 10 small divisions per centimeter?
a) 1 cm b)
0.5 cm
c) 0.1 cm (1 mm) d) 0.01 cm
8. According to the sources, why is the
average measurement taken during an experiment?
a) To make the report longer b) To minimize error in
measurement
c) To increase the least count d) To prove the hypothesis true
9. Which metric prefix represents the
multiplier 10-9?
a) Micro b)
Pico
c) Nano d)
Milli
10. If a hypothesis is tested and found to
be unproven/unjustified, what should a scientist do next?
a) Prepare the final report b) Modify the hypothesis and
repeat the steps
c) Stop the research immediately d) Change the collected data
11. Which of the following is considered a
"scientific process skill"?
a) Memorization b) Classification
c) Guessing d)
Speed reading
12. Which field of science includes the
study of Geology, Astronomy, and Agriculture?
a) Physics b)
Biology
c) Chemistry d)
Interdisciplinary fields
13. The coefficient in scientific notation
must be a number between:
a) 0 and 1 b)
1 and 9
c) 1 and 100 d)
10 and 20
14. Which achievement is associated with the
field of Biology?
a) Electric engine b) Vaccine development
c) X-Ray d)
Industrial chemicals
15. What is the multiplier for the prefix
"Mega"?
a) 103 b) 104
c) 106 d)
1012
16. A digital stopwatch can measure time
down to 0.01 seconds. This 0.01 second is also known as:
a) One millisecond b) One centisecond
c) One decisecond d) One microsecond
17. Which of these is a challenge associated
with the development of the "Health" field?
a) Air pollution b) Chemical pollution
c) Destruction of cells by over-radiation
d) Violation of personal privacy
18. The scientific study of the motion of
paper airplanes helps to practice which skill?
a) Safety measures b) Scientific process skills
c) Industrial chemistry d) Veterinary medicine
19. How many meters are in 1 kilometer ( m)?
a) 100 m b)
1000 m
c) 10,000 m d)
10 m
20. What is the final step of scientific
learning according to the flowchart?
a) Result and conclusion b) Hypothesis testing
c) Report/Communication d) Data collection
Answer Key
1. c | 2. b | 3. c | 4. b
| 5. d | 6. c | 7. c | 8. b | 9. c | 10. b
| 11. b | 12. d | 13. b | 14. b | 15. c |
16. b | 17. c | 18. b | 19. b | 20. c
Very short answer type questions:
1. What is science?
Science is the systematic quest and application of knowledge about the natural and social world through evidence-based methodologies.
2. Define scientific method.
Scientific Method refers to a structured approach for investigating phenomena, involving: Observation and question formulation, Hypothesis development, Experimentation and data collection and Analysis and conclusion
3. What is physics?
Physics is the study of inanimate natural processes and their mathematical description.
4. What is biotechnology?
Biotechnology applies biological systems, organisms, or processes to develop products and services.
5. What are the two main branches of science?
Two main branches of science are: Physical science and Biological science
6. What is scientific measurement.
Scientific Measurement involves quantifying observations using standardized units (e.g., SI units) to ensure accuracy and reproducibility
7. What is accuracy in measurement?
Accuracy in Measurement refers to how close a measured value is to the true value, minimizing systematic errors.
8. Define average measurement.
Average Measurement is the arithmetic mean, calculated as the sum of observations divided by their count
9. What is precise measurement.
Precise Measurement indicates consistency in repeated results, reflecting minimal random errors.
10. Write an importance of protector.
Importance of Protractor: A protractor is essential for measuring angles with precision, crucial in fields like engineering and geometry.
11. Define least count.
Least Count is the smallest measurement increment an instrument can detect. For example, a ruler with millimeter marks has a least count of 1 mm.
12. What is the least count of protector?
Least Count of Protractor: Typically 1° (degree), though high-precision versions may measure 0.5°.
13. The mass of whatermelon is 5 kg. What does it mean?
Mass of Watermelon (5 kg): This indicates the watermelon’s quantity of matter is equivalent to 5 kilograms.
14. Which of the two is greater: a microgram or nanogram?
Microgram vs. Nanogram: A microgram (μg) is larger (1 μg = 1,000 ng).
15. How many millimetres are considered in one meter?
Millimeters in a Meter: 1 meter = 1,000 millimeters.
More Questions with Answers
1. What is the definition of science?
Ans: Science is the process of knowledge building through an organized method based on facts.
2. What is the first step of scientific learning?
Ans: The first step is the observation of events or problems to develop curiosity or research questions.
3. What occurs during the second step of scientific learning?
Ans: In the second step, a hypothesis is built as an estimated explanation for the research question.
4What is the final step of scientific learning?
Ans: The last step is preparing a report and communicating findings to others.
5. Name three scientific process skills.
Ans: Three skills include observation, questioning, and measurement.
6. Why is taking an average measurement important?
Ans: Taking an average minimizes error and provides a more accurate result than a single measurement.
7. What is the ‘least count’ of a measuring instrument?
Ans: It is the lowest amount that can be measured by that specific instrument.
8. What is the least count of a standard ruler?
Ans: The least count of a scale is 0.1 cm or 1 mm.
9. Which instrument has a least count of 0.01 seconds?
Ans: A digital stopwatch can measure down to 0.01 seconds.
10. Define scientific notation.
Ans: It is a method used to express very small or very large numerals as a power of ten.
11. What is the rule for the coefficient in scientific notation?
Ans: The coefficient must always be an integral number between 1 and 9.
12. What is the constant base used in scientific notation?
The base used in this system is always 10.
13. What is the value of the metric prefix ‘Giga’?
Ans: The value of the Giga prefix is 109
14. Which metric prefix represents the value 10−9 ?
Ans: The prefix 'nano' represents 10−9.
15. What is the typical size range of prokaryotic cells?
Ans: Prokaryotic cells range in size from 10−6to 10−4μm.
16. Who developed the intraocular lens to treat cataracts?
Ans: Eye surgeon Dr. Sanduk Ruit discovered the intraocular lens.
17. What does the field of biology study?
Ans: Biology is the field that studies facts about organisms, including their structure and behavior.
18. Name one major achievement in the field of Physics.
Ans: Achievements include the development of the electric engine, microscope, and X-ray.
19. What tools are used to collect evidence in science?
Ans: Scientists use sense organs and various instruments to collect evidence for knowledge building.
20. Where are experimental works typically performed?
Ans: Experiments are performed in laboratories or the outer environment.
Short Answer type questions:
1. Write any two importance of biology.
Biology helps us
understand the structure and functions of living organisms.
It aids in improving
health through medical advancements.
2. Why do we study physics?
We study physics to
understand the fundamental laws of nature and how things work in the universe.
3. Mention any two points to establish
the importance of physics.
Physics helps in the
development of new technologies.
It explains natural
phenomena like gravity, light, and electricity.
4. Write any two differences between
life science and physical science.
|
Life Science |
Physical Science |
|
Studies
living organisms |
Studies non-living matter |
|
Examples: Biology, Zoology |
Examples: Physics, Chemistry |
5. Give the list of steps involved in
the scientific method.
List of steps involved in scientific methods are:
Observation
Question formulation
Hypothesis development
Experimentation
Data analysis
Conclusion
6. A stop watch is used when an athlete
runs. Give reason.
A stop watch is used
when athletes run because it measures time accurately, which is essential to
record the athlete’s performance.
7. The diameter of an atom is
0.000,000,0001m, write its standard notation.
The standard notation of
0.000,000, 0001 is 1×10−10 m1×10−10m
8. What are the requirement for
selecting a unit of a physical quantity? Write any two points.
The unit should be
universally accepted.
It should be easy to
reproduce and measure accurately.
9. State two precautions which you
would like to take while measuring the length of an object by using meter
scale.
Two precautions which we
would like take while measuring the length of an object by using meter scale
are:
a) Ensure the meter scale is placed
straight along the object.
b) Read the measurement at eye level to
avoid parallax error.
Long Answer type questions.
1. How does biology help in leading a healthier life?
Biology plays a crucial role in helping individuals lead healthier lives by providing a scientific understanding of the human body, diseases, nutrition, and the environment. Through the study of biology, we learn about the structure and function of body parts, the causes and prevention of diseases, and the importance of proper nutrition and hygiene. This knowledge enables the development of effective medicines and treatments, encourages healthy habits such as regular exercise and sanitation, and helps identify and mitigate environmental threats to health. By understanding how living organisms interact and how our bodies work, biology empowers us to make informed decisions that promote overall well-being and longevity.
- Describe the scientific methods
followed by a biologist.
Biologists use the scientific method to
investigate questions about living organisms. The process typically involves:
- Observation: Identifying a phenomenon
or problem.
- Formulating a Hypothesis: Proposing a tentative
explanation or prediction.
- Experimentation: Designing and conducting
experiments to test the hypothesis.
- Data Collection: Gathering and recording
observations and measurements.
- Analysis: Interpreting the data to
determine if it supports or refutes the hypothesis.
- Conclusion: Drawing conclusions and,
if necessary, refining the hypothesis for further testing.
- Communication: Sharing results with the
scientific community for peer review and validation8.
- Why should students be taught
physics? Justify your answer with examples.
Physics is fundamental to understanding how the world works. Teaching physics helps students develop critical thinking and problem-solving skills by exploring concepts such as motion, energy, electricity, and magnetism. For example, understanding the principles of electricity is essential for safely using household appliances, while knowledge of mechanics helps explain how vehicles move. Physics education also fosters innovation, as seen in the development of technologies like smartphones, medical imaging devices, and renewable energy systems. By learning physics, students gain a deeper appreciation of natural phenomena and are better equipped to contribute to technological advancements and solve real-world problems.
- Explain how you would measure a
length correctly with the help of a meter scale.
To measure length accurately using a meter scale:
- Place the object on a flat
surface and align one end with the zero mark on the scale.
- Ensure your eye is directly
above the point being measured to avoid parallax error.
- Read the measurement at the
other end of the object, noting the mark on the scale that aligns with it.
- If the object’s edge falls
between two marks, estimate the length to the nearest fraction of a
millimeter.
- Record the measurement,
including the appropriate unit (centimeters or millimeters).
- From your own side, think of a
problem which physics has not solved yet. Explain.
One major problem that physics has not yet fully solved is the reconciliation of quantum mechanics and general relativity. While quantum mechanics explains the behavior of very small particles and general relativity describes gravity and the large-scale structure of the universe, the two theories are fundamentally incompatible. A unified theory of quantum gravity, which would explain how gravity works at the quantum level, remains elusive. Solving this problem could unlock new understanding about black holes, the origin of the universe, and the fundamental nature of reality.
- The study of biology helps in
increasing the yield of food. Explain this statement with two strong
evidences.
- Development of High-Yield
Varieties: Biology
has enabled the creation of genetically modified crops and high-yield
varieties through selective breeding and biotechnology. These crops are
more resistant to pests, diseases, and environmental stresses, resulting
in increased food production.
- Improved Agricultural
Practices: Understanding
plant physiology and soil microbiology has led to better fertilizer use,
pest control, and irrigation techniques. These advancements optimize crop
growth and minimize losses, further boosting food yield.
- How is a stopwatch used to
measure the time interval of an event? Explain with an example.
A stopwatch is used to measure the duration between the start and end of an event with high precision. To use a stopwatch:
- Press the start button as soon
as the event begins.
- Let the event proceed.
- Press the stop button
immediately when the event ends.
- Read the time displayed, which
indicates the time interval.
Example: To measure how long it takes a student to run 100 meters, start the stopwatch when the student begins running and stop it as soon as they cross the finish line. The time shown on the stopwatch is the duration of the run.
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