Is the amount of water on Earth decreasing?
Earth’s water is finite, meaning that the amount of water in, on, and above our planet does not increase or decrease.
Is there more water on Earth now?
Most of the earth’s surface consists of water; there is much more water than there is land. 2. Water can not only be found on the surface, but also in the ground and in the air. The overall amount of water on our planet has remained the same for two billion years.
What would happen if there were no air on the earth?
If there was no air on earth, plants and animals would not survive. All life forms will cease to exist on the earth resulting in the planets becoming uninhabitable. Moreover the ultra violet rays will fall on earth and cause untold destruction because the atmosphere will lack ozone layer.
Can gravity ever run out?
Gravitational force is one of the four fundamental forces in nature. You can’t run out of gravity because it will be there as long as the object has finite mass. According to Einstein’s theory of relativity, gravity is a curved spacetime created by any finite mass.
What if an astronaut gets sick?
The astronaut in charge of medical treatments will take care of the sick. All astronauts are trained for emergency resuscitations in case of heart attacks. Many medical instruments and medicine are included in the Space Shuttle’s medical kit. These kits are used to treat minor illness and injuries during the flights.
What happens to astronauts bodies in space?
In space, astronauts lose fluid volume—including up to 22% of their blood volume. Because it has less blood to pump, the heart will atrophy. When gravity is taken away or reduced during space exploration, the blood tends to collect in the upper body instead, resulting in facial edema and other unwelcome side effects.
Will a gun fire in space?
Fires can’t burn in the oxygen-free vacuum of space, but guns can shoot. No atmospheric oxygen required. The only difference between pulling the trigger on Earth and in space is the shape of the resulting smoke trail.