Electron microscopes are used in biology to see the structure of very tiny things. They can magnify things up to 10 million times.
A vacuum is a space devoid of matter. It is sometimes used in physics to show how things would work if they were not affected by air resistance making them work in ideal conditions.
A tropical cyclone is a rapidly rotating storm that bring heavy rain and can cause flooding in places close to sea level. They can be called tropical cyclones, hurricanes or tropical storm depending on the severity of the storm.
The Atlantic Ocean is on the East side of North and South America extending all the way to the West side of Europe and Africa. It is the second largest Ocean just behind the Pacific Ocean. It covers around 20% of the worlds surface.
Tropical Storm Wikimedia Commons
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