Explain what stomata do for desert plants

Desert plants need to conserve water most of the time. They already have mechanisms to do this. The thorns on the cactus are its leaves and conserve the water very well. Other desert plants have a thick leathery leaf with fewer stomata than plants in more temperate climates.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.