What Is an Icebreaker?
Icebreaker is a ship which is specially shaped and strengthened so that it can cut through ice-fields which would stop or crush an ordinary
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When Is the Earth Nearest the Sun?
The Earth is nearest to the Sun on about the second or third day in January. The distance varies because the Earth spins round the Sun in an
What Is Radar?
Radar, or radiolocation, as it was called in the early days, is the use of radio waves to find the whereabouts of aircraft or ships. Electro
Why Does a Tornado Suck up Everything in Its Path?
Why Does a Tornado Suck up Everything in Its Path? A tornado has a strong lifting force due to the updraft of air in the funnel. Tornadoes s
Why Does Lightning Always Strike the Highest Object Around?
Why Does Lightning Always Strike the Highest Object Around? Lightning is usually attracted to tall structures. Lightning is an electric spar