Write a paragraph to explain why people do not fall off Earth’s surface. Be sure to do the following:
Identify the force that keeps everything on Earth’s surface.
Explain why people on opposite side of the globe do not feel upside down or sideways.
Describe why objects fall down.
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We can't feel Earth rotating because we're all moving with it, at the same constant speed. Image via NASA.gov. Earth spins on its axis once in every 24-hour day. ... It's because you and everything else – including Earth's oceans and atmosphere – are spinning along with the Earth at the same constant speed.
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Waste water treatment includes physical, chemical as well as biological processes. Water is allowed to settle in a large tank which slopes towards the middle. Solids (e.g. faeces) settle at the bottom and are removed with a scraper. This is sludge.
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