The Solar System, Explained
A friendly tour of the planets, moons and the star at the middle of it all.
Which planet is closest to the Sun?
Weather can feel random, but it runs on a handful of simple ideas. Ten questions on the sky above you — each with the reason behind the answer.
The weather is the one science everyone checks before leaving the house, but the reasons behind it are less obvious than the forecast. This quiz covers how weather works and how it differs from climate, from the water cycle and pressure systems to the events that make the news. The explanations turn familiar sights, clouds, wind, and rain, into a system you can actually follow. It is practical knowledge with a long reach, because the same forces that decide whether you need an umbrella also shape the seasons, the harvests, and the climate of the whole planet.
Every question in this quiz is listed below with its correct answer and the reasoning behind it. Play first if you would rather not see the answers — or read through as a study sheet.
Play it insteadAnswer: B. The troposphere
Why: Almost all clouds, rain and storms happen in the troposphere, the lowest layer, reaching up to about 10 to 15 km.
Answer: A. A front
Why: A front — warm, cold or occluded — is where two air masses meet, and it brings much of our changeable weather.
Answer: A. A barometer
Why: A barometer measures air pressure. Falling pressure often warns of approaching storms, while rising pressure signals fairer weather.
Answer: C. The jet stream
Why: The jet stream is a narrow band of very strong wind high in the atmosphere that pushes weather systems along and shapes their paths.
Answer: B. Condenses
Why: As moist air rises and cools, water vapour condenses onto tiny particles into droplets, and those droplets are what we see as cloud.
Answer: A. Tornadoes
Why: The Enhanced Fujita scale rates tornadoes from EF0 to EF5, based on the damage they cause rather than wind speed alone.
Answer: C. Climate is the long-term average of weather
Why: Weather is what is happening now; climate is the pattern of weather averaged over decades. As the saying goes, climate is what you expect, weather is what you get.
Answer: C. Carbon dioxide
Why: Carbon dioxide traps heat in the atmosphere, and its rising concentration from burning fossil fuels is the chief cause of global warming.
Answer: A. Sunlight bending inside raindrops
Why: Sunlight bends as it enters and leaves raindrops, splitting into its colours and reflecting back to the observer to form a rainbow.
Answer: A. Lower pressure
Why: Air flows from high pressure to low pressure, and that movement is wind; the bigger the pressure difference, the stronger the wind.
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A friendly tour of the planets, moons and the star at the middle of it all.
Which planet is closest to the Sun?
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