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