General Science & Ability

Chemical messengers produced by cells or glands that regulate activities in other parts of the body

A biological catalyst that speeds up biochemical reactions without being consumed in the reaction

To receive, process and transmit information through electrical and chemical signals

The neuron

The natural body at Earth's surface composed of mineral and organic material, water, air and living organisms that supports plant growth

Unwanted or harmful environmental sound that can adversely affect health and well-being

PM10 and PM2.5

A mixture of tiny solid particles and liquid droplets suspended in air

A naturally occurring inorganic solid with a characteristic chemical composition and crystalline structure

The crust

Crust, mantle and core

A violently rotating column of air extending from a thunderstorm to the ground