What is the name of the process where a gas changes directly to a solid without passing through the liquid phase?

Which part of the human ear is responsible for detecting sound vibrations and transmitting them to the brain?

What is the term for a type of galaxy that does not have a distinct shape, containing a mix of old and young stars?

Which moon of Uranus is named after a character from William Shakespeare's play "A Midsummer Night's Dream"?

What is the SI unit of work and energy?

Which gas, abundant in the atmospheres of Uranus and Neptune, gives these planets their blue-green color?

Which type of reaction involves the combination of two or more substances to form a new substance?

Which of the following is a greenhouse gas?

What is the chemical symbol for potassium?

Which layer of the Earth's atmosphere is closest to space and where meteors burn up upon entry?