What is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll?
Which gas is the most abundant in Earth's atmosphere?
What is the atomic number of the element oxygen?
What type of energy is stored in the nucleus of an atom?
Which planet in our solar system is known as the red planet?
What is the unit of measurement for electric current?
What is the hardest substance found in nature?
What is the force that opposes motion between two surfaces that are in contact?
Which famous scientist developed the theory of relativity?
What is the SI unit for measuring temperature?