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