Which gas is commonly used to fill balloons so that they float in air?

Which simple machine is used in a bottle opener to pry open a cap?

Which common food item is fortified with iodine in many countries to prevent deficiency related disorders?

Which macronutrient is essential for building and repairing body tissues such as muscles?

Which element is the primary component of natural gas used for cooking and heating?

Which common kitchen ingredient is used as a natural indicator to test acidity or basicity in simple science experiments?

Which cell organelle is primarily responsible for breaking down waste materials and cellular debris?

Which mineral deficiency is commonly associated with goiter due to impaired thyroid hormone production?

Which unit measures the loudness or intensity of sound?

Which type of wave does light represent in terms of its propagation?

Which essential mineral is critical for oxygen transport in the blood as a key component of hemoglobin?