Weightlessness: All objects and living things would float, making it difficult to walk, eat, drink, or do anything normal.
Loss of atmosphere: Without gravity to hold it down, the atmosphere would immediately disperse into space, making it impossible for living things to breathe.
Loss of water: Without gravity, the water in the oceans, lakes, and rivers would disappear, leaving Earth with no water supply.
No tides: The gravitational pull of the Moon causes Earth's ocean tides, so without gravity, there would be no high or low tides.
No sense of up or down: Without gravity, there would be no clear sense of what is "up" or "down", making navigation and spatial awareness very difficult.
Evolution: Gravity has played a crucial role in shaping the evolution of organisms on Earth, so life-forms may have evolved differently or not existed at all.
Extreme temperature fluctuations: Without an atmosphere, there would be extreme temperature fluctuations.
Unusual seasons: The motion of the Earth around its orbit would be affected, which would result in unusual changes in the seasons.
Unusual sunrise and sunset: The timing of the sunrise and sunset would change.