Which of the following is a type of cloud that often forms a dark, towering structure and is associated with thunderstorms?

What is the chemical formula for table sugar (sucrose)?

Which of the following is a type of soil erosion where small, loose particles are lifted by the wind and transported to another location?

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

Which element is present in all organic compounds?

Which gas is responsible for the formation of the ozone layer in the Earth's atmosphere?

What is the chemical formula for nitric acid?

What is the chemical formula for sodium hydroxide?

Which of the following is a greenhouse gas?

What is the primary function of the cell membrane?