A ... is a vertical funnel of rapidly spinning air.
tornado
A ... is a series of fast-moving waves in the ocean caused by powerful earthquakes, volcanic eruptions, or landslides...
tsunami
A ... is a type of storm called a tropical cyclone, which forms over tropical or subtropical waters.
hurricane
A ... is the sliding down of a mass of earth or rock from a mountain or cliff.
landslide
A ... is the state of burning that produces flames that send out heat, light, and smoke.
fire
A ... is a period of time when an area or region experiences the lack of water in streams, rivers, lakes, and groundwater.
drought
A ... is an overflow of water that submerges land that is usually dry.
flood
An ... is the shaking of the surface of the Earth.
earthquake
A ... occurs when hot materials such as lava, dust, rocks, and gas are thrown out of a volcano.
volcanic eruption