National Wildlife Federation
The Water Cycle
Observe the water cycle from the comfort of your classroom with this excellent earth science experiment. Working collaboratively, young scientists first create terrariums complete with hills, plants, lakes, and an...
Center for Learning in Action
Water—Changing States (Part 1)
Here is part one of a two-part lesson in which scholars investigate the changing states of water—liquid, solid, and gas. With grand conversation and up to three demonstrations, learners make predictions about what they think will happen...
Center for Learning in Action
Water – Changing States (Part 2)
Here is part two of a two-part lesson in which scholars investigate the changing states of water—liquid, solid, and gas—and how energy from heat changes its molecules. With grand conversation, two demonstrations, and one hands-on...
Curated OER
Weather Dude: The Water Cycle
Informational weather site highlights The Water Cycle. Discover how it works and learn more about evaporation and condensation.
University of Illinois
University of Illinois Urbana Champaign: Relative Humidity
Describes what relative humidity is, shows how it is calculated, and how it is related to evaporation and condensation.
University of Illinois
University of Illinois Urbana Champaign: The Hydrologic Cycle
Water is the source of life on earth. It exists in many forms and is constantly changing. The circulation and conservation of earth's water is called the hydrologic (or water) cycle. Find out how water evaporates, condensates,...
Chem4kids
Chem4 Kids: Liquids
This overview of liquids explores what a liquid is and how matter becomes changes into a liquid.
Other
Warmair.com: Refrigeration Cycle
The expansion-compression-condensation cycle of a refrigerator is discussed and explained. Understandable language but no graphics.
Science Struck
Science Struck: Water Cycle: An Easy Explanation for Kids
Provides a simple explanation of the water cycle by describing four main stages - evaporation, condensation, precipitation, and collection. Includes three project ideas and some interesting facts.
Science Struck
Science Struck: Water Cycle Diagram
Describes the four main stages of the water cycle - evaporation, condensation, precipitation, and collection.
eSchool Today
E School Today: Your Revision Notes on the Water Cycle
Learn about the different stages of the Earth's water cycle, and about processes involving water, including runoff, infiltration, and the differences between hard and soft water.
Georgia State University
Georgia State University: Hyper Physics: Phase Change Concepts
An indexing page for the HyperPhysics site. This page includes links to a variety of pages at the site which contain information related to phase changes. Each individual page consists of informative graphics and clear explanations.
University of Illinois
University of Illinois Urbana Champaign: A Summary of the Hydrologic Cycle
Animation and text explain the water--or hydrologic--cycle, which is the process that water undergoes in nature.
US Geological Survey
Usgs: The Water Cycle
Learn about the movement of water from Earth's surface to the atmosphere with this site. Site describes the water cycle in words and with a diagram. Also explored on the page is the distribution of Earth's global water supply.
Oklahoma Mesonet
Oklahoma Climatological Survey: Heat Transfer
A discussion from the Oklahoma Climatological Survey of the thermal factors effecting the movement of air masses in the atmosphere. Numerous topics such as methods of heat transfer, latent heat, phase changes (including sublimation and...
Center for Educational Technologies
Earth Science Explorer: The Water Cycle
This is a very brief overview of the water cycle, but it does have a nice graphical representation.
CK-12 Foundation
Ck 12: Earth Science: Processes of the Water Cycle Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key points about the water cycle. Includes a few questions to check for understanding.
Other
Warm Air: Central Air Conditioning
The operation of conventional air conditioners are described. Their parts and the refrigerant/heat exchange cycle is discussed. The use of alternative geothermal systems are explained.
Missouri Botanical Garden
Missouri Botanical Garden: The Water Cycle
This simple overview provides definitions of key terms in the water cycle and a diagram showing the path water takes in this cycle.
Other
New Jersey Section of the American Water Works Association: The Water Cycle
Simple diagram and explanations of the water cycle and related terms.
Other
Homewood City Schools: Classification of Matter
This Homewood City Schools site has an outline form and contains lots of information about the classification and composition of matter. Some of the topics covered are matter and temperature, changes in state, composition of matter, and...
Science Struck
Science Struck: A Simple Guide to the Steps of the Water Cycle
The steps in the water cycle and the processes that occur are explained in this resource.
Internet Encyclopedia of Philosophy
Internet Encyclopedia of Philosophy: Anaximenes
This site from the Internet Encyclopedia of Philosophy provides a brief biography of Anaximenes and summary of his thought.