PIMSO 2025 - Science - Secondary 3 - National Round Question 19

Question 19

Which statement best describes how thunderstorms form?

1. Convection currents cause cirrus clouds to become wider, resulting in less energy in the clouds than in the surrounding air
2. Convection currents cause cumulus clouds to become taller, resulting in more energy in the clouds than in the surrounding air.
3. Downdrafts resulting from evaporation cause cirrus clouds to become taller, resulting in more energy in the clouds than in the surrounding air.
4. Downdrafts resulting from evaporation cause cumulus clouds to become wider, resulting in less energy in the clouds than in the surrounding air.