Card 1
HintThink of a powerful, spinning air column in a storm.Memory TipTwister, cyclone, funnel.
Card 2
HintIt's a specific area in the Great Plains known for frequent tornadoes.Memory TipUS central tornado hotspot.
Card 3
HintIt's a special type of thunderstorm with pre-existing rotation.Memory TipRotating big storm.
Card 4
HintImagine winds blowing at different speeds at different heights.Memory TipDifferent height, different wind.
Card 5
HintIt's the rising air current in a storm that helps create the funnel.Memory TipAir goes up.
Card 6
HintIt's the visible, cone-shaped part of a forming tornado, but hasn't touched the ground yet.Memory TipTornado in the air.
Card 7
HintMeteorologists look for this shape on radar to warn of tornadoes.Memory TipRadar's 'hook' warns.
Card 8
HintIt's how scientists rate a tornado's strength after it has caused damage.Memory TipDamage = EF rating.
Card 9
HintThis is the lowest rating on the EF scale, causing light damage.Memory TipWeakest EF, minor damage.
Card 10
HintThis is the most destructive rating on the EF scale.Memory TipStrongest EF, homes gone.