Curated OER
Comparing Fresh and Salt Water: Venn Diagram
In this Venn diagram worksheet, students compare and contrast fresh water and salt water. Worksheet includes a link to additional activities.
NOAA
Please Pass the Salt
Salinity is the focus of two experimenters that work to answer the question, How does salt change the physical properties of water? Super scientists compare the freezing rate of salt and fresh water, combine the two waters to observe how...
Centers for Ocean Sciences
Ocean and Great Lakes Literacy: Principle 7
Your mission, should you choose to accept it, is to take your class on an underwater adventure. The final installment in a seven-part series involving salt and freshwater bodies takes junior oceanographers below the surface in...
Polar Trec
Sea Ice Impact
The arctic seas contain currents that are both warm (with high salinity) and cold (relatively fresh water) that circulate throughout the year. Through discussion, a lab, and a web quest, participants explore the impacts of melting and...
Curated OER
environment: Fresh and Saltwater Habitats
Students compare and contrast fresh and salt water coastal environments. After describing how sea animals adapt to their habitats, they design a variety of sea creatures and explain how the adaptations aid in the animals' survival. ...
Curated OER
Living Organisms as Indicators of Pollutants in Fresh Water Ecosystems
Students observe the effects of pollution on living organisms. In this pollution lesson plan, students observe fresh water Hydra and look at their structures and movement. They place samples of pond and lake water on the Hydra and...
Curated OER
Ocean Habitats
Young scholars examine the water samples from a demonstration and discuss the difference between fresh and salt water. They draw different animals that live near or in the ocean and how humans can harm the ocean habitat. They draw...
Curated OER
Investigating the Effect of Salinity on the Density and Stability of Water
Water with varying amounts of dissolved salt are dyed and then used to compare densities. The objective is to discover the effect of salinity, and therefore density, on ocean water on the stability of the ocean. Many branches of science...
Curated OER
Diaper Challenge
Students compare the absorbency of a regular diaper and a swim diaper in fresh water and salt water. In this absorbency lesson plan, students mass the diapers and place them in water and determine the change in mass. They do the same...
Curated OER
Water Issues on Puerto Rico and Oahu: A Comparison of Two Islands
Fifth graders explore how the tow islands receive and use fresh water. They also address some of the threats to the fresh water supply on each island. Students explore the lesson objectives through water cycle models and experiments.
NOAA
An Ocean of Energy
Young biologists trace the path of the sun's energy through marine ecosystems in the second part of this four-lesson series. Building on prior knowledge about producers, consumers, and decomposers young scholars are introduced to the...
Curated OER
The Floating Golf Ball
Students explore density by floating golf balls. They explore having their golf balls float halfway in a container of water and discuss density and its realtionship to where the golf balls are floating. After adding food coloring, they...
Curated OER
A Tool for the Environment
For this desalting salt water worksheet, students will read about three different methods of desalting sea water which includes distilling, crystallizing, and filtering. Students will describe these methods in three short answer...
Curated OER
Earth Water Distribution and Water Consumption
Students explore the need for conserving fresh water and understand that it is a limited supply. For this water consumption lesson students participate in an activity and answer questions.
Curated OER
Tenochtitlan Needs a Drink
Students engineer a way to provide drinking water using Aztec technology. In this engineering a way to provide drinking water using Aztec technology lesson, students find a way to deliver fresh water to a city surrounded by salt water. ...
Curated OER
Science Lesson #2
Fourth graders explore and experiment with objects that float to see if they float differently in salt water or fresh water. After the experiment, they write a paragraph in their science journal explaining how fresh water and ocean water...
Curated OER
Boat Safety and Water Sports - Lesson 4 - Dangerous Sea Creatures
Lesson 4 is part of a 22 instructional activity unit on boat safety and water sports. This instructional activity is about dangerous sea creatures, mainly in the ocean. There is a link to find pictures of the creatures discussed. It is...
Curated OER
Biocomplexity Lab Activity: Creating Salt Water
The lesson plan seeks to intorduce to students the properties of salt water and how to create salt water. Teacher gives backgound information about salt water to students. From that point, students dscuss what elements are in salt...
National Wildlife Federation
Water, Water Everywhere?
Visibly display the location of the water in the world. Using 12 liters of water to represent the total amount of water in the world, the class measures out the water located in different areas, such as the ocean and ice caps. Class...
American Chemical Society
Changing the Density of a Liquid - Adding Salt
Fourth in a set of several little lessons on density, this one compares the density of fresh and salt water. First by demonstration, and then by a hands-on activity, learners find that adding salt increases the density, as is evidenced...
Curated OER
Water Sources in Cape Verde and West Africa
Young explorers study the scarcity and importance of a continuous supply of fresh water in Cape Verde. They research the five main ways that fresh water is obtained in these countries. Each research group prepares a presentation, and...
Curated OER
MEASURING THE DENSITY OF WATER
Learners perform an experiment to measure the density of tap water vs. salt water.
Curated OER
Aquatic Organisms
Students create a poster describing the five characteristics of a salt water organism compared to a fresh water organism.
Curated OER
North American Biomes
In this Science worksheet, students color a biome map of North America. Students color the map by solving the clues listed on a separate sheet of paper.