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