What is the term for the process by which water changes from vapor to liquid as it cools?

What is the SI unit of resistance in an electrical circuit?

Which layer of the Earth's atmosphere is characterized by the presence of the ionosphere and where auroras occur?

What is the name of the massive cloud of gas and dust from which a star and its planets form?

Which blood vessels carry blood away from the heart?

Which of the following is a major component of Earth's core, along with iron and nickel?

What layer of the Earth's atmosphere contains the ozone layer?

What type of rock is formed from the cooling and solidification of molten magma?

What is the principle behind the functioning of a magnifying glass?

What is the term for the point in a planet's orbit where it is farthest from the Sun?