Exploring the Investigative World of Science
Short Questions
1. Why does a puri puff up when fried?
Answer:- It puffs up because steam forms inside the dough when heated.
2.What does the kite symbol on the right-hand pages represent?
Answer:- It represents curiosity and exploring new ideas.
3. What is one way to stay healthy?
Answer:- Eating nutritious food.
4. What helps motors run?
Answer:- The magnetic effect of electric current.
5. What causes a ball to fall back to the ground?
Answer:- The force of gravity.
6. What is pressure in science?
Answer:- It is how force is spread over an area.
7. What happens to particles in a gas?
Answer:- They move around freely.
8. What is an element in science?
Answer:- A pure substance that cannot be broken down.
9. What is a compound?
Answer:- Two or more elements bonded together.
10. How does light bend?
Answer:- It bends when passing through lenses.
11.Why do we see phases of the Moon?
Answer:- Due to the changing positions of Earth, Moon, and Sun.
12. What helps humans create calendars?
Answer:- Observing the Moon’s phases and Sun’s movements.
13. What protects Earth from harmful ultraviolet rays?
Answer:- The atmosphere.
14. What can change Earth’s climate?
Answer:- Human activities.
15. What is a mixture in science?
Answer:- A combination of substances that can be separated physically.
Long Questions
1. Why is one side of a puri thinner than the other when fried?
Answer:- One side may be thinner due to uneven rolling or heating. Steam inside the puri pushes harder on one side, causing it to stretch.
2. How does science help us understand the world?
Answer:- Science starts with curiosity and questions like “Why” and “How.” It uses observation, experiments, and explanations to uncover new facts.
3. What is the difference between elements, compounds, and mixtures?
Answer:- Elements are pure substances, compounds are elements bonded together, and mixtures are combinations that can be separated. Each has unique properties affecting how they behave.
4. How do forces affect the movement of objects?
Answer:- Forces can make objects speed up, slow down, or change direction. For example, gravity pulls a ball back to the ground.
5. Why do some microbes help us while others cause harm?
Answer:- Some microbes help digest food or make medicines, while others cause infections. Their role depends on their type and interaction with our body.
6. How does pressure affect weather events like storms?
Answer:-Differences in air pressure create winds, from gentle breezes to strong cyclones. Larger pressure differences cause more powerful weather events.
7. How does light help us see images in mirrors or lenses?
Answer:- Light reflects off mirrors or bends through lenses to form images. This explains how glasses help us see clearly.
8. Why are calendars linked to the movements of the Sun and Moon?
Answer:- Calendars are based on observing sunrise, sunset, and Moon phases. These cycles help humans track time and seasons.
9. How do human activities affect Earth’s climate?
Answer:- Activities like burning fuel increase Earth’s temperature, disrupting climate patterns. Science helps us understand and address these changes.
10. What is the importance of systematic investigation in science?
Answer:-Systematic investigation involves asking focused questions, controlling variables, and observing outcomes. It helps scientists find reliable answers, like why a puri puffs up.
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