Selected MCQ

Current Question
Which planet in our solar system has an orbital period shorter than its rotational period (a day longer than its year)?
  • A. Mercury
  • B. Venus
  • C. Mars
  • D. Jupiter
Correct Answer: B
Explanation:
Venus rotates very slowly (a Venusian day is about 243 Earth days) compared to its 225-day orbit around the Sun.
Related Question 1
Which of the following is NOT a dwarf planet in our solar system?
  • A. Pluto
  • B. Eris
  • C. Haumea
  • D. Titan
Correct Answer: D
Explanation:
Titan is a large moon of Saturn, not classified as a dwarf planet.
Related Question 2
The exoplanet candidate discovered orbiting Alpha Centauri A is notable because its mass is similar to that of which planet in our Solar System?
  • A. Earth
  • B. Jupiter
  • C. Saturn
  • D. Uranus
Correct Answer: C
Explanation:
Observations suggest an Alpha Centauri A exoplanet with a mass similar to Saturn, likely a gas giant.
Related Question 3
Which nearby star system had four rocky exoplanets confirmed around it by 2025?
  • A. Barnard's Star
  • B. Proxima Centauri
  • C. Sirius
  • D. Vega
Correct Answer: A
Explanation:
Four small rocky planets were confirmed around Barnard's Star (though none are in the habitable zone).
Related Question 4
Which planet has its axis tilted by about 98 degrees, leading to extreme seasons?
  • A. Uranus
  • B. Venus
  • C. Mercury
  • D. Neptune
Correct Answer: A
Explanation:
Uranus rotates almost on its side (~98° tilt), causing extreme seasonal changes.
Related Question 5
What is the advantage of using ROS (Robot Operating System)?
  • A. It designs robot hardware
  • B. It provides a standard platform for robot software components
  • C. It replaces the operating system
  • D. It secures robot networks
Correct Answer: B
Explanation:
ROS offers tools and libraries to simplify robot software development and integration.