Earth & Atmosphere
83 questions available
FILTER BY SUBTOPIC
Q21.Third most common gas that is found in the air to breath is:
Correct Answer: C
Correct answer is C: Argon
Q22.Which one is the most abundant in Atmosphere
Correct Answer: B
Q23.Third most common gas that is found in the air to breath is called:
Correct Answer: C
Correct Answer: Argon.
Q24.In which layer of the atmosphere are most of the clouds formed?
Correct Answer: B
Correct Answer: Troposphere.
Q25.To clean the ice from the roads during the winter season, which of the following is used?
Correct Answer: B
Correct Answer: Salt.
Q26.Which of the following gases is used in the refrigerator for cooling?
Correct Answer: B
Correct Answer: Ammonia.
Q27.Which of the following is the warmest ocean?
Correct Answer: A
Correct Answer: Indian Ocean.
Q28.The gas used to extinguish fires is:
Correct Answer: C
CO2 displaces oxygen around the flame, suffocating the fire (FPSC 2025).
Q29.Water reaches its maximum density at what temperature?
Correct Answer: C
Water expands as it cools below 4°C, making ice less dense than water (FPSC 2025).
Q30.The main component of natural gas (Sui Gas in Pakistan) is:
Correct Answer: C
Natural gas is composed of roughly 85% to 95% Methane (FPSC 2025).
Q31.Which gas is most abundant in the Earth's atmosphere?
Correct Answer: B
Nitrogen makes up roughly 78% of the atmosphere (FPSC 2025).
Q32.An instrument used to measure atmospheric pressure is called:
Correct Answer: C
Invented by Torricelli to measure air pressure (FPSC 2025).
Q33.he most abundant gas in the earth atmosphere is?
Correct Answer: B
He most abundant gas in the earth atmosphere is Nitrogen.
Q34.A lake starts freezing because of the cold atmosphere. It will first freeze:
Correct Answer: C
Water reaches its maximum density at 4°C. As it cools below 4°C, it becomes less dense and rises, causing the top surface to freeze first.
Q35.Earthquake waves travel faster in ____?
Correct Answer: A
Among the options provided, longitudinal seismic P-waves travel much faster in water than in gaseous air or dry soil.
Q36.Earthquakes are caused by:
Correct Answer: D
Earthquakes can be caused by tectonic plate movement, volcanic activity, and human activities, so 'all of these' is correct.
Q37.As we go higher into the atmosphere, the air becomes?
Correct Answer: A
As altitude increases, air pressure and density decrease, making the air thinner.
Q38.Coldest point in atmosphere is?
Correct Answer: B
Coldest point in atmosphere is Mesopause. Its geographic position or physical characteristics account for the description given.
Q39.Earthquakes occur most frequently at ____?
Correct Answer: A
Earthquakes occur most frequently at Plate boundaries. Astronomical observations and measurements establish this relationship among the relevant celestial bodies.
Q40.Elastic rebound theory explains:
Correct Answer: C
Elastic rebound theory explains: causes of earthquake. The stated result follows from the relevant physical relationship between force, matter, motion, or energy.