1) What is the largest planet in our solar system? a) Earth b) Mars c) Jupiter d) Venus 2) Which gas do humans breathe in to survive? a) Oxygen b) Carbon dioxide c) Nitrogen d) Hydrogen 3) What is H₂O more commonly known as? a) Oxygen b) Water c) Salt d) Hydrogen 4) Which part of the plant makes food through photosynthesis? a) Roots b) Stem c) Leaves d) Flowers 5) What is the center of an atom called? a) Electron b) Proton c) Nucleus d) Neutron

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