Download presentation
Presentation is loading. Please wait.
Published byEmery Anthony Modified over 5 years ago
1
Essential Question: What are the steps in the water cycle?
Key Concept: Water is always moving between the troposphere and surface of Earth. Each components of the water cycle process has certain conditions under which each form of precipitation develops.
2
Water ...Where is it? EVERYWHERE 97% of Earth's water is salt water 3% is freshwater ...but much of this water is frozen. The rest can be found in groundwater, lakes, wetlands, rivers, and water vapor in the atmosphere.
3
Water Cycle A NEVER ENDING movement of water between Earth's surface and the atmosphere. There are 3 REPEATING processes: - Evaporation - Condensation - Precipitation ** This process could not happen without the sun's energy!
4
1. Evaporation: process that changes a liquid to a gas
- Heat energy from the sun causes water to change from a liquid to a gas. -This gas is called water vapor. -Plants also release water vapor through transpiration
5
2. Condensation: a process that changes gas to a liquid
- Water vapor changes back to water droplets when it cools. Where: High Low On a surface Makes: Clouds Fog Dew Clouds= condensed water vapor. **Frost forms when water vapor directly changes from a gas to an ice crystal. (This happens when the air temperature is at or below freezing)
7
3. Precipitation: water falls to Earth's surface as rain, snow, freezing rain, sleet, or hail. (Depends on weather conditions) - Water vapor changes back to water droplets when it cools. Water droplets form in clouds - when they get to big then they fall to the ground = rain/precipitation. Precipitation brings water back to Earth. **If this water is heated, it can become water vapor = cycle continues.
8
4 types of precipitation
10
When water falls to the ground, the water may flow over land and collect in:
- rivers - streams - ponds -lakes After it precipitates, water always attempts to move back towards sea level as SURFACE WATER FLOW or GROUND WATER FLOW
11
1. Surface water flow (Run off): water we
can easily see moving across Earth's surface. 2. Ground water flow: water that soaks into the ground. Water falls through cracks/spaces between sand and soil. (porous soil = a lot of space in soil) -Water collects in aquifers underground.
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.