presentation on water cycle

1. Water Cycle

3. WATER CYCLE
The water cycle is also known as the hydrological
cycle. There is the same amount of water on the
earth now as there was when the earth began. The
water cycle is how the earth's water recycles itself.

5. EVAPORATION
Evaporation is the process by which water
changes from liquid to gas or vapor.
Evaporation is the primary pathway that water
moves from the liquid back into the water cycle
as atmospheric water vapor.

6. In the water cycle, evaporation occurs when the
sunlight warms the surface of the water. The heat
from the sun makes the water molecules move
faster. So fast that they escape as gas. Once
evaporated , a molecule of water vapor spends
about 10 days in the air.

7. Transpiration
Transpiration is the process of water movement
through a plant and its evaporation from aerial
parts, such as leaves, stems and flowers. Water
is necessary for plants but only a small amount
of water taken up by the roots is used for growth
and metabolism. The remaining 97–99.5% is lost
by transpiration and guttation.

8. The process of respiration in plants involves
using the sugars produced during photosynthesis
plus oxygen to produce energy for plant growth.
Respiration takes place in the mitochondria of the
cell in the presence of oxygen, which is called
"aerobic respiration".

10. Condensation
Condensation is the process through which the
physical change of matter changes from gaseous phase
to liquid state. it happens when water vapour in the
air changes into liquid water when it comes in contact
with cooler surface. it occurs when warm air collides
with cooler surface or when there is too much
humidity.Condensation happens one of two ways:
Either the air is cooled to its dew point or it becomes
so saturated with water vapor that it cannot hold any
more water.

11. Rain is liquid water in the form of droplets that
have condensed from atmospheric water vapor and then become heavy
enough to fall under gravity. Rain is a major component of the water
cycle and is responsible for depositing most of the fresh water on the Earth.
It provides suitable conditions for many types of ecosystems, as well as
water for hydroelectric power plants and crop irrigation. Clouds are made of
water droplets. Within a cloud, water droplets condense onto one another,
causing the droplets to grow. When these water droplets get too heavy to
stay suspended in the cloud, they fall to Earth as rain

12. Infiltration
Infiltration is the process by which precipitation
or water soaks into subsurface soils and moves
into rocks through cracks and pore spaces. As we
mentioned before, the bulk of rainwater and
melted snow end up infiltrated.