air

animal

atmosphere

balance

beat

beauty

caused

combine

condenses

crucial

cycle

droplets

dust

earth

ecological

environment

eventually

fall

falling

form

freshwater

gravity

ground

grow

heavy

helps

holds

life

like

maintain

molecules

nature

particles

plant

play

pollen

rain

rainfall

rainwater

regulate

replenishing

role

round

shape

size

sources

spherical

surface

sustaining

temperature

tension

tiny

together

unique

vapor

water