what will happen if all the water in earth is completely disappeared

If all the water on Earth were to suddenly disappear, it would have profound and catastrophic effects:

1. Immediate Death of Life Forms: Almost all life on Earth would immediately perish due to dehydration and the inability to survive without water.

2. Collapse of Food Chains: The extinction of plants, being the primary producers in many ecosystems, would lead to cascading effects throughout the food chain, causing the collapse of entire ecosystems.

3. Failure of Human Society: Without water, agriculture would cease, leading to a global famine as crops and livestock would die off. Water is also needed for sanitation, energy production (including hydroelectric power), and manufacturing, leading to a collapse of industrial and societal structures.

4. Dramatic Temperature Changes: Without the moderating effect of water on temperature through processes like evaporation and transpiration, Earth's climate would become extremely inhospitable. Temperatures would vary greatly between day and night and from the equator to the poles, making the environment unlivable for most organisms.

5. Disappearance of Weather Patterns: Weather systems are driven by the movement and exchange of water in the atmosphere. Without water, there would be no clouds, rain, snow, or storms.

6. End of the Water Cycle: The cycle that replenishes the Earth's surface with water through precipitation would cease to exist.

7. Impact on Geological Processes: Water plays a crucial role in shaping the planet's surface through erosion, sediment transport, and the formation of aquifers. Its absence would dramatically alter these geological processes.

8. Desertification of the Planet: All landmasses would become deserts, devoid of any moisture, with soil and surface materials rapidly drying out and becoming infertile.

9. Disappearance of Aquatic Ecosystems: Oceans, seas, and other bodies of water would vanish, disrupting marine life and the many processes that occur within aquatic ecosystems.

10. Atmospheric Changes: The composition of Earth's atmosphere would drastically change due to the loss of water vapor, affecting weather patterns and potentially causing a greenhouse effect, further escalating temperatures.

11. Collapse of Infrastructure: Many human-made structures, such as bridges, dams, and ports, would become structurally unsound or obsolete without water.

12. Radiation Increase: With no atmospheric water vapor to protect against solar radiation, including ultraviolet rays, the intensity of harmful radiation reaching the Earth's surface would significantly increase.

In essence, a planet without water would become a barren, lifeless rock, unable to support the rich biodiversity and complex ecosystems we know today. The environmental, social, and economic consequences would be unimaginable, resulting in the end of life as we know it on Earth.