What is the primary component of bones and teeth?

Which household disinfectant chemical is commonly used to purify drinking water in small quantities?

Which process in plants involves losing water vapour through stomata helping in cooling and nutrient transport?

Which type of teeth are flat and chisel-shaped primarily used for cutting and biting food?

Which layer of the atmosphere contains the ozone layer that absorbs harmful ultraviolet radiation?

Which gas makes up approximately 0.04 percent of Earth's atmosphere and is essential for plant photosynthesis?

Which scientific principle explains why objects float or sink in a fluid?

Which common substance has the chemical formula H2O2?

Which type of energy is stored in chemical bonds of fuel and released during combustion?

Which simple machine is used in a pair of scissors?

Which gas causes the fizzing and bubbling when a carbonated drink bottle is opened?