Class 8
Science
Chapter 11
Curiosity (latest NCERT)
Keeping Time with the Skies
Free NCERT practice questions for Class 8 Science, Chapter 11 — 88 questions across MCQs, short-answer, long-answer, numericals and more. Download a printable PDF worksheet in seconds. No signup, no ads, no paywall.
Sample questions from this chapter
Here are 6 real questions students will encounter when they generate a worksheet for this chapter. Every question includes the answer.
MCQ
Medium
1 mark
The phases of the Moon happen because:
(a) The Earth's shadow falls on it
(b) The Moon changes shape
(c) We see different parts of its illuminated half as it goes round the Earth
(d) Clouds cover parts of it
Answer: We see different parts of its illuminated half as it goes round the Earth
Short Answer
Medium
3 marks
Explain why the Moon's shape appears to change from day to day.
Answer: • The Moon is always half-lit by the Sun.
• As the Moon orbits the Earth, we see different parts of its illuminated half.
• That is why the visible 'shape' changes through the phases.
Fill in the Blank
Easy
1 mark
The Moon shines because it reflects __________ from the Sun.
Answer: sunlight
Numerical
Medium
3 marks
If we stopped having leap years, by about how many days would the calendar drift after 40 years? (Assume drift of 0.25 days per year.)
Answer: • Drift = 40 × 0.25 = 10 days.
Very Short
Medium
1 mark
Why do we see different phases of the Moon (per summary)?
Answer: Because we see different parts of the Moon's illuminated half as it moves around the Earth.
True / False
Medium
1 mark
State True or False: The shadow of the Earth blocks sunlight from reaching the Moon, causing phases.
Answer: False. Earth's shadow does NOT cause Moon phases (that causes a lunar eclipse). Phases are due to the changing positions of the Moon and the Sun relative to us.
Generate a worksheet with all 88 questions →
Frequently asked questions
What is included in Class 8 Science Chapter 11 (Keeping Time with the Skies)?
This chapter has 88 NCERT-aligned practice questions covering all the concepts from the Curiosity textbook's Chapter 11. Questions span easy, medium and hard levels across 10 different formats so students get a balanced practice set.
Are these questions based on the new NCERT Curiosity textbook?
Yes. Every question on Practico for Class 8 Science is mapped directly to the latest NCERT Curiosity textbook (the one CBSE schools are using now). The chapter numbers and chapter titles match the textbook exactly.
How many questions can I practice from this chapter?
88 questions are available right now. You can pick how many you want at a time — generate 10 quick MCQs, a 30-question worksheet, or a full exam-style mix. Each generation gives you a different random set.
Can I download a free PDF worksheet for Keeping Time with the Skies?
Yes — completely free, no sign-up required. Pick this chapter, choose the number of questions and types you want, and download a printable PDF (with or without answers) in one click.
What question types are available?
This chapter has assertion reason, fill blank, image, long, match, mcq, numerical, short, true false, very short. You can mix any combination, or filter to just the type you want to practice — for example, only numericals to drill calculation, or only short-answer questions for exam revision.
Is Practico aligned with CBSE exam patterns?
Yes. Practico questions are tagged by marks (1, 2, 3, 5) and by difficulty (Easy/Medium/Hard) just like CBSE exam blueprints, so you can build a worksheet that mirrors a real unit test or annual exam.