Science as a tool to understand the past, present and future
Science as a tool to understand the past, present and future MCQ Questions
13.
What is the age of earth
ANSWER :
A. 4.5 Billion years
Approach
The age of the Earth is a fundamental concept in geology and astronomy, determined through radiometric dating of rocks and meteorites. This question tests knowledge of this widely accepted scientific value.
Step-by-step
- Scientists estimate the age of the Earth primarily by dating meteorites, which are remnants from the early solar system and are believed to have formed at the same time as the Earth.
- The most common method used is radiometric dating, specifically using the decay of radioactive isotopes like uranium-lead or potassium-argon.
- Studies of the oldest known Earth rocks and lunar samples also provide constraints, but meteorites offer the most precise age for the formation of the solar system, and thus the Earth.
- Based on extensive research and multiple dating methods, the scientifically accepted age of the Earth is approximately 4.54 billion years.
Correct Option:
A) 4.5 Billion years is the closest and most widely accepted scientific estimate for the age of the Earth. More precisely, it is about 4.54 billion years, with an uncertainty of about 50 million years.
Incorrect Options
- B) 4.4 Billion years — While close, this is slightly less than the generally accepted age. The oldest known Earth minerals (zircons) are around 4.4 billion years old, but the Earth itself is older.
- C) 4.9 Billion years — This figure is significantly older than the scientifically accepted age of the Earth.
- D) 4.1 Billion years — This figure is significantly younger than the scientifically accepted age of the Earth.
14.
Find the odd one out :
Science is not used in
Approach
The question asks to identify the field where science is NOT used. We need to evaluate each option to determine its relationship with scientific principles and applications.
Step-by-step
- Analyze Option A (Medicine): Medicine is fundamentally based on scientific research, biological understanding, chemical processes, and technological advancements. Diagnosis, treatment, drug development, and surgical procedures all rely heavily on scientific principles.
- Analyze Option B (Agriculture): Agriculture uses science extensively, including soil science, botany, genetics (for crop improvement), entomology (pest control), and chemistry (fertilizers, pesticides). Modern farming techniques are direct applications of scientific knowledge.
- Analyze Option C (Construction): Construction involves engineering principles, material science, physics (mechanics, structural integrity), and geology (foundations). The design and building of structures are heavily reliant on scientific and mathematical understanding.
- Analyze Option D (Philosophy): Philosophy is a field of study that explores fundamental questions about existence, knowledge, values, reason, mind, and language. While it can interact with scientific findings and methods (e.g., philosophy of science), it is primarily concerned with conceptual analysis, critical thinking, and abstract reasoning, rather than the application of empirical scientific methods or technological development. It is a distinct discipline from empirical science.
Correct Option:
D) Philosophy. Philosophy is a branch of knowledge that deals with fundamental questions about existence, knowledge, values, reason, mind, and language. While it can analyze and critique scientific methods and findings (philosophy of science), it does not itself use scientific methods or principles in the same direct, empirical, or applied way as medicine, agriculture, or construction. It is a field of inquiry that relies more on logical argumentation and conceptual analysis.
Incorrect Options
- A) Medicine — Medicine is a highly scientific field, relying on biology, chemistry, physics, and technology for diagnosis, treatment, and research.
- B) Agriculture — Agriculture extensively uses scientific principles from various disciplines like soil science, botany, genetics, and chemistry to improve crop yields, manage pests, and develop sustainable practices.
- C) Construction — Construction is an applied science (engineering) that uses principles of physics, material science, and mathematics to design and build structures safely and efficiently.
15.
Which development enabled a massive difference in transformation
Approach
The question asks to identify the development that brought about a massive difference in transformation. This refers to a fundamental change in human society, culture, and progress. We need to evaluate each option based on its impact on human civilization.
Step-by-step
- Consider the impact of each option:
- Speaking: While crucial for communication and social bonding, speaking is an innate human ability that evolved very early. It allowed for the transmission of immediate knowledge but was limited by memory and the presence of the speaker.
- Writing: The invention of writing allowed for the permanent recording of information, ideas, laws, and history. This transcended the limitations of oral tradition, enabling knowledge to be accumulated, preserved, and transmitted across vast distances and generations. It laid the foundation for complex societies, administration, science, and education.
- Listening: Like speaking, listening is a fundamental aspect of oral communication. It is a passive reception of information and, while essential, does not in itself drive a "massive difference in transformation" in the way an active creation or invention does.
- Hunting: Hunting was a critical activity for early human survival and development, contributing to diet, tool-making, and social structures. However, it represents a mode of subsistence rather than a transformative technology or communication method that fundamentally reshaped human civilization in the same way writing did.
- Compare the transformative power: Among the given options, writing stands out as the development that enabled the most profound and widespread transformation by allowing for the systematic accumulation and dissemination of knowledge, leading to the development of complex civilizations.
Correct Option:
B) Writing — The invention of writing was a monumental leap for humanity. It allowed for the codification of laws, the recording of history, the development of complex administrative systems, the spread of knowledge beyond oral traditions, and the foundation of science and literature. This ability to store and transmit information reliably across time and space led to unprecedented societal, cultural, and technological advancements, truly making a "massive difference in transformation."
Incorrect Options
- A) Speaking — Speaking is fundamental for human interaction and the initial transmission of culture. However, it is an oral tradition, limited by memory and the immediate presence of individuals. It does not allow for the permanent, widespread, and cumulative storage of information in the same transformative way writing does.
- C) Listening — Listening is a receptive skill, essential for communication but not an active development or invention that drives societal transformation on a massive scale. It is a component of oral communication, which has inherent limitations compared to written communication.
- D) Hunting — Hunting was a crucial survival strategy for early humans, influencing social organization and technological development (e.g., tools). While important for early human evolution, it represents a subsistence activity rather than a communication or information technology that fundamentally altered the trajectory of human civilization in the way writing did.
16.
What was the name of the first man-made satellite launched by the Soviet Union in 1957?
Approach
The question asks for the name of the first man-made satellite launched by the Soviet Union in 1957. This is a factual recall question related to space history.
Step-by-step
- Recall key events in the early history of space exploration.
- Identify the first satellite launched by the Soviet Union.
- Confirm the year of its launch.
- Match this information with the given options.
The Soviet Union launched the first artificial Earth satellite on October 4, 1957. This event marked the beginning of the Space Age and was a significant milestone in human history. The satellite was named Sputnik 1.
Correct Option: B) Sputnik 1 was indeed the first artificial Earth satellite launched by the Soviet Union on October 4, 1957. Its launch initiated the Space Age and the space race between the US and the Soviet Union.
Incorrect Options
- A) Apollo 15 — Apollo 15 was a manned mission to the Moon, part of the United States' Apollo program, launched in 1971. It was not the first satellite and was launched by the USA, not the Soviet Union.
- C) Apollo 12 — Apollo 12 was another manned mission to the Moon by the United States, launched in 1969. It was not the first satellite and was launched by the USA, not the Soviet Union.
- D) Apollo 11 — Apollo 11 was the historic United States mission that first landed humans on the Moon in 1969. It was not the first satellite and was launched by the USA, not the Soviet Union.
Approach
The question asks to identify the inventor of X-rays. This is a factual recall question from the history of science and technology.
Step-by-step
- Recall prominent scientists and their major discoveries/inventions.
- Identify the scientist credited with the discovery of X-rays.
- Wilhelm Conrad Röntgen is widely recognized for his discovery of X-rays in 1895.
Correct Option: C) Rontgen is the correct answer. Wilhelm Conrad Röntgen discovered X-rays in 1895, for which he received the first Nobel Prize in Physics in 1901.
Incorrect Options
- A) Rutherford — Ernest Rutherford is famous for his pioneering work in nuclear physics, including the discovery of the atomic nucleus and the proton. He did not invent X-rays.
- B) Newton — Sir Isaac Newton was a physicist and mathematician who developed the laws of motion and universal gravitation, and made significant contributions to optics. He lived much earlier and did not invent X-rays.
- D) Baird — John Logie Baird was a Scottish engineer and inventor who is widely credited with inventing the world's first working television system. He did not invent X-rays.
18.
Who discovered the theory of relativity?
Approach
The question asks to identify the scientist credited with discovering the theory of relativity. This is a direct knowledge-based question related to famous scientific discoveries and their proponents.
Step-by-step
- Recall prominent physicists and their major contributions.
- The theory of relativity, encompassing both special and general relativity, revolutionized our understanding of space, time, gravity, and the universe.
- This theory is famously associated with one particular scientist.
- Identify the scientist from the given options who is renowned for this groundbreaking work.
Correct Option: A) Einstein. Albert Einstein is widely recognized as the physicist who developed the theory of relativity. His work, published in the early 20th century, fundamentally changed physics and laid the groundwork for many modern scientific advancements.
Incorrect Options
- B) Edison. Thomas Edison was a prolific inventor, known for the practical application of electricity, including the incandescent light bulb and the phonograph, but not for the theory of relativity.
- C) Khurana. Har Gobind Khorana was a biochemist who shared the Nobel Prize for his work on interpreting the genetic code and its function in protein synthesis, not for physics theories.
- D) Newton. Isaac Newton was a foundational figure in classical physics, known for his laws of motion and universal gravitation, which predated Einstein's theory of relativity by centuries. While his work was monumental, he did not discover relativity.
