Which of the following is a diatomic molecule?

Which of the following is a characteristic of acids?

What is the formula for water?

What is the chemical symbol for helium?

Which of the following is a type of igneous rock that forms from the cooling and solidification of lava on the Earth's surface?

What is the term for the zone of the ocean where light cannot penetrate, and temperatures are low and pressure is high?

Which of the following is a greenhouse gas?

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

What is the chemical formula for hydrochloric acid?

Which layer of the Earth's atmosphere is characterized by decreasing temperature with altitude and contains the ozone layer?