/7 Science Quiz (for 12 to 16 years old): Quiz 2 1 / 7Which of the gas is not known as green house gas? Hydrogen Carbon dioxide Methane Nitrous oxide 2 / 7The gas usually filled in the electric bulb is oxygen Nitrogen carbon dioxide hydrogen 3 / 7Bromine is a black solid highly inflammable gas red liquid colourless gas 4 / 7Quartz crystals normally used in quartz clocks etc. is chemically germanium oxide a mixture of germanium oxide and silicon dioxide sodium silicate silicon dioxide 5 / 7Washing soda is the common name for Calcium carbonate Calcium bicarbonate Sodium bicarbonate Sodium carbonate 6 / 7The hardest substance available on earth is Iron Platinum Gold Diamond 7 / 7What is the primary cause of climate change? Human activity Animal activity Natural factors Climate change is primarily caused by human activity, particularly the burning of fossil fuels and deforestation.Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback
