Class 7 Science Chapter 1 Very Short Question Answer - The Ever-Evolving World of Science

Q1: What is the shape of the Earth’s orbit around the Sun?
Answer: The Earth moves around the Sun in a nearly circular path called an orbit.

Q2: What inspired real scientific explorations of flight?
Answer: Paper planes helped scientists understand how objects can fly through the air.

Q3: What is the duration of the Earth’s revolution around the Sun?
Answer: It takes the Earth one whole year (365 days) to complete one trip around the Sun.

Earth's RevolutionQ4: What does the tilt of the Earth’s axis cause?
Answer: The tilt makes different parts of Earth get sunlight differently, creating seasons.

Q5: What can be explored with electric batteries, lamps, and wires?
Answer: These tools help us study how electricity works and flows.

Q6: What happens to materials when they are heated?
Answer: Heating can make materials change their shape, size, or state.

Q7: What is one example of an irreversible change?
Answer: Once a battery is used up, it cannot be changed back to new again.

Reversible and Irreversible ChangesQ8: How does water flow in the environment?
Answer: Water moves below the ground through soil and rocks.

Q9: What are life processes essential for survival?
Answer: Eating gives energy needed for all life activities.

Q10: Do plants also need food to grow?
Answer: Plants make their own food using sunlight to grow healthy.

Q11: What was the way early humans measured time?
Answer: They used the length and position of shadows to tell the time.

Q12: Why is light important for us?
Answer: Light helps our eyes see things around us.

Q13: What causes eclipses?
Answer: Eclipses happen when one object’s shadow falls on another.

EclipsesQ14: How does the Earth rotate to cause day and night?
Answer: Earth spins around its axis, making day and night.

Q15: How does the Earth’s movement around the Sun affect us?
Answer: As Earth moves around the Sun, the tilt causes different seasons.

Q16: What happens during a solar eclipse?
Answer: The Moon blocks the Sun’s light, causing a solar eclipse.

Q17: What is a lunar eclipse?
Answer: The Earth’s shadow falls on the Moon, causing a lunar eclipse.

Q18: Can we safely view a lunar eclipse with our naked eye?
Answer: Lunar eclipses are safe to watch without special glasses.

Q19: What causes the stars to appear to move in the sky?
Answer: Earth’s spinning makes stars seem like they move across the sky.

Q20: How is the Earth’s axis related to the seasons?
Answer: The slant (tilt) of Earth’s axis causes seasons to change.