A) inside a science lab
B) in empty space
C) in the air
D) in the core of the Earth

A) hurricane
B) tornado
C) thunderstorm
D) desert

A) hot and dry
B) dark and wet
C) wet and cold
D) rainy and humid

A) humidity
B) temperature
C) lightning
D) air pressure

A) sunlight
B) clouds
C) lightning
D) air

A) nimbus clouds
B) a cooler temperature
C) gravity
D) rain

A) clouds
B) snow
C) hail
D) rain

A) sound
B) magnetic power
C) solar energy
D) gravity

A) strong wind
B) energy from the sun
C) an electrical charge released into the atmosphere
D) a loud noise in the atmosphere

A) clouds
B) ocean
C) desert
D) forest

A) tornado
B) thunderstorm
C) hurricane
D) blizzard

A) barometer
B) balance scale
C) rain gauge
D) graduated cylinder

A) the weight of the air pressing on everything in the environment
B) the type of clouds in the atmosphere
C) the amount of water vapor in the air
D) the amount of precipitation in a certain area

A) a large bubble of air
B) the place where one air mass meets another
C) the place where it is raining
D) the type of weather in a place

A) a type of weather map
B) the place where air changes mass
C) a large pocket of air
D) the force of wind

A) the amount of air pressure on a certain day
B) the usual weather in a place
C) condensation in the atmosphere
D) a description of an ecosystem