What is the primary method by which a Stirling engine produces mechanical energy?

Which of the following substances is considered a metal but is a liquid at room temperature?

What is the origin of the name 'quark' in particle physics?

Which of the following elements is the primary component of the Earth's core?

What is the hottest planet in our solar system, despite not being the closest to the Sun?

How long does it take sunlight to reach Earth from the Sun?

Which planet has a longer orbital period around the Sun, Venus or Mars?

What is the primary function of mitochondria in eukaryotic cells?

Which international agreement aims to regulate the trade of endangered species to ensure their survival?

Which element is more abundant in the Earth's crust, silicon or aluminum?

Which metal is liquid at room temperature besides mercury, commonly defying expectations?

What is the primary cause for the increasing acidity of oceans worldwide?

Which international agreement focuses on climate change and aims to limit global warming to below 2°C?

The element "tantalum" is named after a figure from Greek mythology. Who is this figure?

Which desert has the largest expanse of sand dunes globally?