Introduction to Soil Nitrogen and Demonstration of a Simple Test Procedure

Students list the three types of mineral particles that form soil. They explain the importance of an optimum soil texture. They form an hypothesis and make observations. They also draw a conclusion.

Students list the sources of potassium in soils. They explain the processes in which potassium is removed and used by plants. They list the symptoms of insufficient or excess potassium.

Students list the sources of phosphorus in soils. They describe the processes in which plants remove phosphorus from the soil. They collect and analyze data and draw a conclusion.

As part of a study of soil and composting, fourth graders become worm farmers, build a vermiculture bin, observe, and care for their red worms.

Students explain the importance of dissolved oxygen in water ecosystems. They describe the aquatic oxygen cycle and the effect of water pollution on oxygen. They make observations, collect data and draw a conclusion.

Make your work as a teacher a little easier with a physical science project on simple machines. After introducing young scientists to these devices and identifying their different uses around the school, this project engages children in...

The choice is simple: create a PowerPoint presentation, write a book, or invent a compound machine. Whichever project your young scientists choose, they will be engaged in creatively demonstrating their knowledge of simple machines and...

Seven superb slides sharpen science students' scoop on soil. In viewing them and reading the accompanying captions, your class will uncover the importance, different types, horizons, and protection of soil. They can then assess their new...

Begin a full lesson on climate change by demonstrating how carbon dioxide gas contributes to increased temperatures. Be aware that pressure inside the antacid-containing bottle in Activity 2 may cause the lid to fly off; keep viewers at...

Expose your class to the steps of the nitrogen cycle with this short clip. Colorful computer imagery and animation explain how nitrogen travels from the atmosphere as a gas into plants and soil, where bacteria convert it into nitrates....