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.

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.

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.

This short presentation provides a convenient introduction to the nitrogen group in the periodic table of elements. A graphic displays where they are placed in the periodic table. The nitrogen cycle is mentioned and ammonia is explained....

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...

Here is a tri-faceted resource that has a slide show, a quiz, and a vocabulary list that you can use to teach simple machines. Six machines are introduced: wheels and axles, planes, levers, pulleys, wedges, and screws. Slides contain...

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....