7th grade Science Brookville Intermediate School The Water Cycle 7th grade Science Brookville Intermediate School
Water on Earth
Water on Earth Types of water on Earth Surface Water: Oceans, Ice, Rivers and Lakes Ground Water: Water that fills the cracks and spaces in underground soil and rock layers. Far more fresh water is located underground than in all Earth's rivers and lakes.
The Water Cycle Water is naturally recycled Continuous process by which water moves through the living and nonliving parts of the environment The sun is the source of energy that drives the water cycle
The Water Cycle Water is constantly moving between sea, air and land
The Water Cycle Water is constantly moving between sea, air and land The sun shines and the sea is heated heat
The Water Cycle Water is constantly moving between sea, air and land The water evaporates and forms clouds Evaporation
The Water Cycle Water is constantly moving between sea, air and land Condensation As air rises it cools and condenses. It reaches the ground as rain, snow, sleet or hail.
The Water Cycle Water is constantly moving between sea, air and land Snow forms Lakes form The snow melts and flows Rivers flow to the sea
The Water Cycle Water is constantly moving between sea, air and land The Water Cycle is complete
The Water Cycle
Water Evaporates Evaporation: process by which molecules at the surface of a liquid absorb enough energy to change to the gaseous state. Water can evaporate from where? Ocean, Lakes, Soil, puddles, and even from your skin Plants: Eventually the water is given off through the leaves as water vapor in a process called transpiration
Clouds Form Water molecules find their way into the atmosphere, warm air carries it upward. Higher up, air tends to become much colder which holds less water vapor than warm air. Some of the water vapor cools and condenses into liquid water. Condensed droplets of water clump together around tiny dust particles in the air, forming clouds
Water Falls as Precipitation As more water vapor condenses, water droplets in a cloud eventually become so heavy that they fall back to Earth. Water that falls to Earth as rain, snow, hail, or sleet is called precipitation. Precipitation is the source of all fresh water on and below Earth's surface.
The Water Cycle
How Do People Use Water? The water people use at home is just a small percentage of all the water used in the US. In addition to household purposes, people use water for Agriculture Industry Transportation Recreation