This science assignment produced by NASA teaches inquiring minds the distribution of Earth's water. Learners will appreciate and understand the importance of fresh water and how weather and climate affects everything.

What kind of organisms are living in the stream? After an explanation on how to use a dichotomous key, groups of three to four use the keys to identify macroinvertebrates from a local freshwater stream. Using the the concept of...

What's in the water? Encourage your class to further explore this question and learn about pond ecosystems, food chains, and food webs as they complete this hands-on activity. They view the environment from a new perspective...

Another A+ lesson on the impact of climate change comes to you from the National Earth Science Teachers Association. For this installment, learners model the stratification of water in lakes due to temperature differences. The lab also...

Young scholars use determination of dissolved oxygen and water temperature changes to determine the environmental impact from thermal pollution.

Tenth graders use a classification key to identify organisms.  In this classification instructional activity students identify freshwater species of fish and document their observations. 

Students observe organisms behavior and adaptations.  In this biomes lesson students conduct fieldwork to determine water quality and answer questions about the differences between different habitats. 

Written for Washington state students in life science, this lesson provides an opportunity to examine the residents of local freshwater habitats. You or the class collects a water sample, and learners try to examine what organisms live...

Third graders role-play various organisms from a food chain to illustrate how a food chain works. In relay style, 3rd graders fill their cups (stomachs) and, in turn, fill a larger organism's cup (stomach) to visualize the importance of...

Field trip! The class will review what they know about organisms that dwell in freshwater ponds, then trek down to the old water hole to collect specimens for examination. This includes several web links, useful tips, and an excellent...

Learners take samples from local freshwater sources and examine them for macroinvertebrate life. They take samples from both shallow and deep freshwater environments, measure temperatures, and classify organisms found in their samples.

Students explore pond ecosystems.  In this pond organism activity, students will use pond water and a plastic bad in order to locate and identify freshwater organisms.  The activity is designed for younger grades, but...

Students use a light microscope to observe the organisms living in a sample of ocean or fresh water. Students create a drawing of the organisms that they observe. Students then discuss the different body plans of the organisms and the...

Mia's friends are fish-sitting while she is away on vacation. Zoe divulges to Sam that different animals need different habitats, and that there are both freshwater and saltwater ecosystems. Examples of the kinds of organisms found in...

In collaborative groups, young ecologists measure the temperature, pH, and dissolved oxygen for three different freshwater samples. They examine each sample with a microscope and record observations on the microorganisms in the pond...

Water covers more than 70 percent of Earth's surface. Scholars learn about both freshwater and saltwater biomes in a simple presentation. They compare and contrast the differences in oxygen levels, food sources, and sunlight to better...

Students examine brackish water. In this Science lesson, students observe organisms found in brackish water. Students record their observations of the various organisms.

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...

Students create a poster describing the five characteristics of a salt water organism compared to a fresh water organism.

High schoolers identify and describe various organisms living in a pond water environment. They describe the characteristics of living things. Students compare and contrast organisms created by asexual reproduction and sexual...

Students visit a local creek or stream. They collect water samples from the creek and observe and sort the "water critters" they find in the sample, observing smaller organisms under a microscope if necessary. They identify each organism...

Learners create a food web mural about an ecosystem of the freshwater marsh. For this food web lesson plan, learners write about the organisms and how each one depends on another.

In this river ecosystem worksheet, students complete a graphic organizer by writing in what the various organisms lists contribute and benefit in this river ecosystem.

Students study Arthropods and their characteristics.  In this organisms lesson students explore the success of Arthropods and answer questions.