What force pulls objects toward the Earth?, Magnetism, Gravity, Electricity, What causes earthquakes?, Movement of tectonic plates, Wind pressure, Solar radiation, What is the chemical symbol for water?, HO, CO2, H2O, Who invented the telephone?, Nicola Tesla, Alexander Graham Bell, James Watt, What is the center of the Earth called?, Core, Crust, Surface, How many lungs does a healthy human have?, One, Two, Three, The first airplane was invented by:, Charles Darwin, Leonardo da Vinci, The Wright brothers, Which gas do plants absorb from the air?, Oxygen, Nitrogen, Carbon dioxide, Which planet is known as the Red Planet?, Jupiter, Mars, Venus, The printing press was invented by, Johannes Gutenberg, Benjamin Franklin, Michael Faraday

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