Density Tower

A density tower is formed by layering immiscible liquids of different densities on top of each other. It is possible because Earth’s gravitational acceleration pulls denser fluid particles stronger and displace less dense ones upward.

Flat-Earthers claim that the possibility to have density towers disproves gravity. In reality, a density tower cannot form without the presence of acceleration, like Earth’s gravitational acceleration.

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How Satellites Can Orbit and Stay Up There

If Earth’s gravity pulls everything towards the Earth, then how can satellites stay up there and are not falling towards the Earth?

The answer is that satellites orbit the Earth. They have the correct velocity with respect to Earth’s position and gravitational pull.

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