What is the chemical symbol for sodium?

What is the name for the phenomenon where a wave bends as it passes from one medium to another at an angle?

Which law of motion states that the rate of change of momentum of an object is directly proportional to the net external force acting on it?

What is the term for the shaking of the ground caused by the movement of Earth's tectonic plates?

Which atmospheric layer is home to the Northern and Southern Lights (auroras) due to the interaction of charged particles with Earth's magnetic field?

In a chemical equation, what do the coefficients represent?

Which layer of the Earth's atmosphere is responsible for protecting life on Earth by absorbing harmful ultraviolet (UV) radiation from the Sun?

Which gas, abundant in the atmospheres of Uranus and Neptune, gives these planets their blue-green color?

Which of Newton's laws explains the principle behind rocket propulsion?

What is the name of the spacecraft that successfully landed the rover "Perseverance" on Mars in 2021?