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  • Question
  • Which of the following causes tornadoes?


  • Options
  • A. condensation
  • B. dry climates
  • C. wind shear
  • D. stationary fronts

  • Correct Answer
  • dry climates 

    Explanation

    Conditions suitable for the formation of a tornado develop when varying temperatures and humidity come together and form thunderclouds. This refers to the presence of warm and moist condition in the lower atmosphere and cold and dry conditions in the upper atmosphere. The place where these varying masses of air meet is known as the dry-line. Such conditions, which are suitable for the formation of a tornado, are most often observed just before a low pressure system develops.

     

    Once the ideal conditions occur, the warm air tries to rise in the atmosphere, while the cold air blocks it. This makes the air in between rotate horizontally. In the meanwhile, the land is heated by the Sun, and hence, the air near the ground becomes warm and starts rising. Continuous fueling by the heat energy from the Sun ensures that the warm air has an upper hand over cold air. As a result of this, the cold air at the top starts sinking and the warm air below starts rising in a spinning motion. As the amount of warm air increases, the formation gains height and becomes intense. The intensity of these devastating tornadoes is such that they can clear off anything that comes in their path.

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    General Science problems


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    • 1. Which of the following is NOT true about energy balance?

    • Options
    • A. Inactive people use more energy so they should consume fewer calories.
    • B. Energy balance is the balance between the amount of calories consumed and the amount used for energy.
    • C. Energy balance is influenced by the amount of exercise one gets and their dietary habits.
    • D. Stored body fat will increase if calorie intake is greater than energy used.
    • Discuss
    • 2. Which of the following is a characteristic of all minerals?

    • Options
    • A. Crystalline solids
    • B. Minerals are inorganic
    • C. All minerals are formed in a natural process
    • D. All the above
    • Discuss
    • 3. Which of these is a starting point for primary succession?

    • Options
    • A. a neglected yard
    • B. a surface exposed by a retreating glacier
    • C. an abandoned city
    • D. abandoned farmland
    • Discuss
    • 4. Valve between the left ventricle and Aorta?

    • Options
    • A. Pulmonic valve
    • B. Tricuspid valve
    • C. Aortic valve
    • D. Mitral valve
    • Discuss
    • 5. The term hierarchy refers to

    • Options
    • A. a team in which everyone is equal and has to pull his or her own weight
    • B. a power structure in which each member knows his or her own place
    • C. a situation in which higher species such as men will always be in control of lower species such as animals
    • D. a condition in which the weak must die so the strong can survive
    • Discuss
    • 6. Energy is measured in units called

    • Options
    • A. Newtons
    • B. Watts
    • C. Joules
    • D. Ohm/mtr
    • Discuss
    • 7. Wild animals are not considered a natural resource.

    • Options
    • A. TRUE
    • B. FALSE
    • Discuss
    • 8. Why are viruses considered to be nonliving?

    • Options
    • A. Viruses have no metabolic activity.
    • B. Viruses don't have any cells, like living organisms.
    • C. Viruses can't produce new proteins, DNA, or RNA.
    • D. All the above
    • Discuss
    • 9. What is the chemical name for vitamin A?

    • Options
    • A. Retinol
    • B. Riboflavin
    • C. Thiamine
    • D. Niacin
    • Discuss
    • 10. Which of the following is not a sedimentary structure?

    • Options
    • A. Magma emplacement
    • B. Mud cracks
    • C. Ripple marks
    • D. Cross beds
    • Discuss


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