What planet is known as the Red Planet?, Venus, Mars, Jupiter, Saturn, What is the center of an atom called?, Electron, Proton, Nucleus, Neutron, Which is the largest organ of the human body?, Hearth, Liver, Brain, Skin, Which gas do humans needs to breath to survive?, Carbon dioxide, Oxygen, Nitrogen, Hydrogen, What force pulls objects towards Earth?, Friction, Magnetism, Gravity, Electricity, What is the chemical formula for water?, CO2, H2O, O2, NaCl, Which part of a plant absorbs water from the soil?, Flower, Leaf, Stem, Root, What is the nearest star to Earth?, Sirius, Polaris, The Sun, Alpha Centauri, Which organ pumps blood throughout the human body?, Lungs, Heart, Kidneys, Stomach, What is the boiling point of pure water at sea level?, 50°C, 75°C, 100°C, 150°C

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