1. radar A tool that sends out radio waves for detecting and locating an object’s position and speed. equator Imaginary line around the Earth Equally distant from the North and South Poles. typhoon A hurricane occurring in the Pacific Ocean. cyclone A hurricane occurring in the Indian Ocean.

2. hailstones Small lumps of ice that fall from clouds sometimes during thunderstorms. drought A long period of dry weather. fog Fine particles of water floating in the atmosphere near the ground (really a cloud on the ground) monsoon A periodic wind in the Indian Ocean and southern Asia.

3. meteorologist A scientist who studies weather.