What vitamin do we get from sunlight?
Which organ pumps blood through the body?
What is the process by which plants make food?
What gas do plants absorb from the atmosphere?
Which gas is most abundant in the Earth’s atmosphere?
What is the chemical symbol for water?
What part of the cell contains DNA?
What force keeps us on the ground?
What is the center of an atom called?
What planet is known for having a tilted rotation axis?
