What is the primary function of the skeletal system?

What type of lens converges light rays to a single point?

What is the name of the process where a solid changes directly to a gas without passing through the liquid phase?

Which of the following is a type of cloud that often forms a dark, towering structure and is associated with thunderstorms?

What is the chemical formula for methane?

What is the fluid-filled sac found in animal cells that stores water and waste products?

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

Which element is the most abundant in the Earth's crust?

Which layer of the Earth's atmosphere contains the ozone layer and where most weather phenomena occur?

What is the chemical formula for common table sugar (sucrose)?