Water Cycle

The water cycle, also known as the hydrologic cycle, is the continuous movement of water on, above, and below the surface of the Earth. This cycle is crucial for the existence of life on our planet.

Processes of the Water Cycle

The water cycle consists of several key processes:

• Evaporation: The sun's heat causes water from bodies of water, such as oceans, lakes, and rivers, to evaporate and form water vapor in the atmosphere.
• Condensation: As the water vapor rises in the atmosphere, it cools and condenses to form clouds.
• Precipitation: When the condensed water droplets in the clouds become too heavy, they fall to the Earth's surface as rain, snow, sleet, or hail.
• Runoff: The water from precipitation flows over the land and collects in rivers, lakes, and oceans.
• Infiltration: Some of the precipitation seeps into the ground to become groundwater.
• Transpiration: Plants release water vapor through their leaves, contributing to the water cycle.

Importance of the Water Cycle

The water cycle plays a critical role in maintaining the Earth's ecosystems and supporting life. It ensures the availability of freshwater for drinking, agriculture, and other human activities. Additionally, the water cycle helps regulate the Earth's temperature and climate through the movement of water and energy.

Study Guide

To better understand the water cycle, consider the following study guide:

1. Define the water cycle and its significance.
2. Identify and describe the key processes of the water cycle.
3. Explain the role of the sun in driving the water cycle.
4. Discuss the impact of human activities on the water cycle.
5. Draw and label a diagram of the water cycle, highlighting each process.
6. Research and present a case study on a region experiencing water cycle disruptions due to environmental changes.

[Water Cycle] Related Worksheets and Study Guides:

• Science Worksheets: Water. Science • Third Grade
• Cycles of life and BiomesScience • Fifth Grade