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All questions of Evolving Systems for Grade 8 Exam
Which of the following statements best describes the relationship between different branches of science?- a) They are only useful in isolation.
- b) Each branch only focuses on its own specific area.
- c) They often overlap and inform each other.
- d) They are completely separate and unrelated.
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements best describes the relationship between different branches of science?
a)
They are only useful in isolation.
b)
Each branch only focuses on its own specific area.
c)
They often overlap and inform each other.
d)
They are completely separate and unrelated.
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Kds Coaching answered |
Different branches of science, such as physics, chemistry, biology, and earth sciences, often overlap and inform one another. For instance, knowledge from chemistry can enhance our understanding of biological processes, like how plants grow. This interconnectedness reflects the complexity of the natural world and encourages a holistic approach to scientific inquiry.
Which of the following best describes the Earth's rotation?- a) It causes day and night.
- b) It only impacts the Moon.
- c) It affects the seasons.
- d) It is unrelated to time.
Correct answer is option 'A'. Can you explain this answer?
Which of the following best describes the Earth's rotation?
a)
It causes day and night.
b)
It only impacts the Moon.
c)
It affects the seasons.
d)
It is unrelated to time.
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Kds Coaching answered |
The Earth's rotation is responsible for causing day and night, as the planet spins on its axis every 24 hours. This rotation creates a cycle that allows different parts of the Earth to experience sunlight and darkness, influencing daily life and natural rhythms. Understanding rotation is crucial for comprehending timekeeping and the functioning of ecosystems.
Why is science referred to as a “process” rather than just a “collection of facts”?- a)Because it only involves doing experiments
- b)Because facts are not reliable
- c)Because it involves questioning, observing, and understanding
- d)Because science keeps changing every year
Correct answer is option 'C'. Can you explain this answer?
Why is science referred to as a “process” rather than just a “collection of facts”?
a)
Because it only involves doing experiments
b)
Because facts are not reliable
c)
Because it involves questioning, observing, and understanding
d)
Because science keeps changing every year
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Rainbow Rise Classes answered |
Science encourages a way of thinking that includes curiosity, questioning, exploring, and understanding patterns in nature — making it a process of continuous learning.
What role does heat play in changes occurring in materials?- a) Heat accelerates certain changes, such as melting ice or evaporating water.
- b) Heat only affects living organisms.
- c) Heat causes all changes to be irreversible.
- d) Heat has no effect on changes.
Correct answer is option 'A'. Can you explain this answer?
What role does heat play in changes occurring in materials?
a)
Heat accelerates certain changes, such as melting ice or evaporating water.
b)
Heat only affects living organisms.
c)
Heat causes all changes to be irreversible.
d)
Heat has no effect on changes.
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Kds Coaching answered |
Heat affects the rate and type of changes in materials by accelerating processes like melting and evaporation. For example, when heat is applied to ice, it melts faster, transitioning from a solid to a liquid state. This principle is crucial in various scientific fields, including chemistry and physics, where understanding thermal effects can lead to practical applications such as cooking and climate science.
Why is it important to measure time in daily life?- a) It only matters for scientific experiments.
- b) It helps us organize our activities and understand natural cycles.
- c) It has no real significance.
- d) It complicates our routines.
Correct answer is option 'B'. Can you explain this answer?
Why is it important to measure time in daily life?
a)
It only matters for scientific experiments.
b)
It helps us organize our activities and understand natural cycles.
c)
It has no real significance.
d)
It complicates our routines.
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Kds Coaching answered |
Measuring time is essential in daily life as it helps individuals organize their activities, such as when to wake up, eat, or sleep. Additionally, understanding time is connected to natural cycles like day and night and the changing seasons. This awareness allows people to plan effectively and appreciate the rhythms of nature, enhancing their overall experience of life.
Which of the following is an example of an irreversible change?- a) Water freezing into ice
- b) A rock breaking into smaller pieces
- c) A fruit ripening
- d) Ice melting into water
Correct answer is option 'C'. Can you explain this answer?
Which of the following is an example of an irreversible change?
a)
Water freezing into ice
b)
A rock breaking into smaller pieces
c)
A fruit ripening
d)
Ice melting into water
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Kds Coaching answered |
A fruit ripening is an example of an irreversible change, as once a fruit has ripened, it cannot return to its unripe state. This concept is significant in understanding biological processes and the life cycles of plants and animals. Irreversible changes highlight the permanent transformations that can occur in nature.
How do humans and plants differ in their methods of obtaining energy?- a)Humans consume food, while plants use photosynthesis to create food from sunlight.
- b)Humans only breathe through their mouths, while plants breathe through their roots.
- c)Both humans and plants rely solely on sunlight for energy.
- d)Humans need sunlight, while plants do not.
Correct answer is option 'A'. Can you explain this answer?
How do humans and plants differ in their methods of obtaining energy?
a)
Humans consume food, while plants use photosynthesis to create food from sunlight.
b)
Humans only breathe through their mouths, while plants breathe through their roots.
c)
Both humans and plants rely solely on sunlight for energy.
d)
Humans need sunlight, while plants do not.
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Kds Coaching answered |
Humans get energy by eating food, while plants use photosynthesis to produce their own energy using sunlight. This difference highlights how both are essential in ecosystems: humans as consumers and plants as producers.
What does the process of photosynthesis allow plants to do?- a) Absorb nutrients only from the ground
- b) Breathe like animals
- c) Store energy in the soil
- d) Produce their own food using sunlight
Correct answer is option 'D'. Can you explain this answer?
What does the process of photosynthesis allow plants to do?
a)
Absorb nutrients only from the ground
b)
Breathe like animals
c)
Store energy in the soil
d)
Produce their own food using sunlight
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Kds Coaching answered |
Photosynthesis allows plants to produce their own food using sunlight, carbon dioxide, and water. This process is vital for life on Earth as it forms the basis of the food chain, providing energy for not only plants but also the animals that consume them. Understanding photosynthesis is essential for grasping ecological relationships and the importance of plants in sustaining life.
What role does curiosity play in scientific inquiry?- a) It is irrelevant to the process.
- b) It is the starting point for asking questions and exploring the world.
- c) It is a distraction from learning.
- d) It only leads to confusion.
Correct answer is option 'B'. Can you explain this answer?
What role does curiosity play in scientific inquiry?
a)
It is irrelevant to the process.
b)
It is the starting point for asking questions and exploring the world.
c)
It is a distraction from learning.
d)
It only leads to confusion.
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Kds Coaching answered |
Curiosity plays a fundamental role in scientific inquiry as it drives individuals to ask questions and explore the world around them. This sense of wonder leads to investigations that can produce new insights and discoveries. Curiosity not only enhances learning but also cultivates a lifelong passion for science and exploration.
What is the primary reason science is described as an adventure in the context of learning?- a) It focuses solely on studying large-scale phenomena.
- b) It encourages curiosity and exploration through questioning and experimentation.
- c) It emphasizes the importance of theoretical knowledge over practical application.
- d) It involves memorizing facts and figures.
Correct answer is option 'B'. Can you explain this answer?
What is the primary reason science is described as an adventure in the context of learning?
a)
It focuses solely on studying large-scale phenomena.
b)
It encourages curiosity and exploration through questioning and experimentation.
c)
It emphasizes the importance of theoretical knowledge over practical application.
d)
It involves memorizing facts and figures.
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Kds Coaching answered |
Science is depicted as an adventure because it thrives on curiosity, prompting individuals to ask questions and conduct experiments. This approach fosters a deeper understanding of the world, making learning an engaging and exploratory process. The adventure aspect emphasizes that science is not just about facts, but about discovery and connection with the surrounding environment.
Chapter doubts & questions for Evolving Systems - Science & Technology for Grade 8 2025 is part of Grade 8 exam preparation. The chapters have been prepared according to the Grade 8 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Grade 8 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Science & Technology for Grade 8
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