The Big Bang occurred ______ years ago.
- A13.7 billion
- B15 million
- C15 billion
- D20 million
120 questions across 8 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
MCQ
26 Q→02Assertion (A) & Reason (B) MCQ
5 Q→03[2 Mark Questions]
20 Q→04Match The Following.
4 Q→05[4 Mark Questions]
9 Q→06Fill In The Blanks.
25 Q→07[ 1 mark questions ]
4 Q→08true or false.[1 Mark each]
27 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: A.
View full solution →Answer: C.
View full solution →Answer: D.
View full solution →Answer: B.
View full solution →Answer: A.
View full solution →At an orbital height of 400 km, find the orbital period of the satellite.
Calculate the speed with which a satellite moves if it is at a height of 36,000 km from the Earth’s surface and has an orbital period of 24 hr (Take R = 6370 km) [Hint: Convert hr into seconds before doing calculation]
| 1. Jupiter | a)17.2 hours |
| 2. Mercury | b)10.7 hours |
| 3. Venus | c) 87.97 days |
| 4. Saturn | d) 9 hours 55 min |
| 5. Mars | e) 243 days |
| f) 87.97 days | |
| g) 24 hours 37 min |
| 1. Ganymede | a) Neptune |
| 2. Triton | b) Jupiter |
| 3. Titan | c) Mars |
| 4. Phobas | d) Saturn |
| 1.Mars | a) Bluish-green planet |
| 2.Jupiter | b) Cold gas giant |
| 3. Earth | c) Giand planet |
| 4. Uranus | d) Red planet |
| 1.Mercury | a) Hottest planet |
| 2.Saturn | b) Greenish star |
| 3.Neptune | c) Rocky planet |
| 4.Venus | d) Lightest planet |
Mars is called the red planet.
True
False
Satellites nearer to the Earth should have lesser orbital velocity.
True
False
Halley’s comet appears after nearly 67 hours.
True
False
ISS is a proof for international cooperation-
True
False
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