9th Class General Science Chapter 6 Test06. Energy Resources

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which is NOT naturally occurring greenhouse gas?
   1. Nitrous oxide
   2. Methane
   3. Carbon dioxide
   4. Ethane
2. Burning of fossil fuels results in:
   1. Increased oxygen level
   2. Decreases greenhouse gases
   3. Increased greenhouse gases
   4. Increased ethane level
3. Which of the following greenhouse gases is present in very high quantities?
   1. Carbon dioxide
   2. Ethane
   3. Propane
   4. Methane
4. The two gases making highest relative contribution to the greenhouse gases are:
   1. CH₄ and NO₂
   2. CO₂ and CH₄
   3. CO₂ and N₂O
   4. CFCs and N₂O
5. Which one of the following is incorrect about the greenhouse effect?
   1. Life on earth is possible due to the greenhouse effect
   2. Greenhouse effect is a natural process that maintains the earth’s temperature
   3. More is the emission of greenhouse gases, more is the temperature of the earth’s atmosphere
   4. Increased emission of greenhouse gases is a natural process
6. Which of the following is used in wind turbines to boost the rotating speed of the rotor shaft to a level for effective energy generation?
   1. Gearbox
   2. Rotor blades
   3. Turbine
   4. Generator
7. The effect of increasing amount of greenhouse gases is:
   1. Increase the surface temperature of the earth
   2. Global warming
   3. Depletion of ozone layer
   4. All of the above
8. In the carbon cycle, the human body returns carbon to the atmosphere through this way:
   1. Formation of glucose
   2. Waste products
   3. Photosynthesis
   4. Cellular respiration
9. The human cell uses to produce energy:
   1. Amino acid
   2. Glucose
   3. Fatty acid
   4. None of above
10. Which of the following statements is true about SMOG?
    1. SMOG is derived from the fog
    2. SMOG is derived from smoke
    3. SMOG is derived from water vapour
    4. SMOG is derived from both fog and smoke