What are butterflies, picnic tables, and water made of?

• Molecules

• Cells

• Atoms

• Particles

How do scientists create images of atoms?

• With telescopes

• By drawing them

• Using powerful microscopes

• With regular cameras

What are water molecules made of?

• Oxygen and carbon

• Hydrogen and oxygen

• Carbon and nitrogen

• Nitrogen and hydrogen

What type of atoms mostly make up wood?

• Nitrogen, oxygen, and carbon

• Hydrogen, nitrogen, and carbon

• Oxygen, nitrogen, and hydrogen

• Hydrogen, oxygen, and carbon

What is the air we breathe mostly made of?

• Nitrogen and hydrogen

• Oxygen and carbon

• Nitrogen and oxygen

• Hydrogen and carbon