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