Water Cycle
The water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. This process is crucial for the existence of life on our planet.
Key Processes in the Water Cycle
There are several key processes involved in the water cycle:
- Evaporation: The process by which water changes from a liquid to a gas (water vapor) due to heat energy from the sun.
- Condensation: The process by which water vapor in the air cools and changes back into liquid water, forming clouds.
- Precipitation: When the accumulated water droplets in clouds become too heavy, they fall to the Earth's surface as rain, snow, sleet, or hail.
- Runoff: When precipitation hits the Earth's surface, it may flow over the ground and collect in rivers, lakes, and oceans, or it may seep into the soil, becoming groundwater.
- Transpiration: The process by which water is absorbed by plant roots and released into the atmosphere as water vapor through the plant's leaves.
Importance of the Water Cycle
The water cycle is vital for sustaining life on Earth. It helps maintain the balance of water on the planet, provides freshwater for plants, animals, and human consumption, and influences weather patterns and climate.
Study Tips
To better understand the water cycle, consider the following study tips:
- Review each key process in the water cycle and understand how they are interconnected.
- Use diagrams and visual aids to illustrate the different stages of the water cycle.
- Learn about the impact of human activities on the water cycle, such as deforestation and pollution.
- Explore real-life examples of the water cycle in action, such as the formation of clouds and the occurrence of rainfall.
By understanding the water cycle, you can gain a greater appreciation for the interconnectedness of Earth's systems and the importance of preserving our planet's water resources.
[Water Cycle] Related Worksheets and Study Guides:
.◂Math Worksheets and Study Guides Seventh Grade. Introduction to Probability
Study Guide
Introduction to Probability 
Worksheet/Answer key
Introduction to Probability Worksheet/Answer key
Introduction to Probability Worksheet/Answer key
Introduction to Probability Worksheet/Answer key
Introduction to Probability
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Data Analysis and Probability (NCTM)
Understand and apply basic concepts of probability
Use proportionality and a basic understanding of probability to make and test conjectures about the results of experiments and simulations.
Connections to the Grade 7 Focal Points (NCTM)
Probability: Students understand that when all outcomes of an experiment are equally likely, the theoretical probability of an event is the fraction of outcomes in which the event occurs. Students use theoretical probability and proportions to make approximate predictions.