Question

1. which of the following is not a greenhouse gas?

water vapor
carbon dioxide
oxygen
methane

1. extremophiles are:

organisms that live only on earth
organisms that live under extreme environmental conditions
plants that require extreme amounts of sunlight
microorganisms that can only live in water

Explanation:

1. Greenhouse gases trap heat in the atmosphere. Water vapor, carbon dioxide, and methane are greenhouse gases. Oxygen is not a greenhouse gas.
2. Extremophiles are organisms that can survive and thrive in extreme environmental conditions (e.g., high - temperature, high - pressure, acidic or alkaline environments). They are not limited to Earth (though all known ones are on Earth currently), not just plants, and not only in water.

Answer:

1. Oxygen
2. Organisms that live under extreme environmental conditions