The world is a big place, so it only stands to reason that different forms of government exist. Democracy, autocracy, oligarch, monarch, and dictatorship are all defined. An extensive explanation of US government system is also included....

This is not revolutionary, but it is informative. Earth science viewers in grades 7-12 get carried away with wave and wind erosion. They view diagrams of how waves impact ocean shorelines. They see examples of the different types of sand...

Examples and practice questions will help real-life understanding of the Principle of Moments concept. These great slides define the types of levers and pivots, and then give examples of the typical seesaw situations that help the...

What must a sentence contain in order to be complete? What different types of sentences exist? Look at declarative, interrogative, and exclamatory sentences with this 17-slide presentation. Several example sentences are shown, and the...

All different types of bonding are covered in this PowerPoint, along with details of resulting bond and molecule shapes. The definitions of traditional molecule shapes and characteristics of behavior are very useful to assist in...

What is the difference between a shield volcano and a cinder cone volcano? How does the flow of lava influence the type of rock that's formed? A presentation on different aspects of volcanoes answers these questions for middle...

Get a chuckle from this presentation, which studies the types of humor in psychology and philosophy. The information provided would fuel a good conversation in your lecture, and the multitude of examples will get your class laughing. The...

A short PowerPoint to help increase pupils' understanding of pressure. A number of pictures show different types of shoes and open a discussion of how force from a body is applied over different areas, (which translates into different...

A succinct set of slides covers the main points for your weather unit. From the factors that contribute to conditions, to fronts and extreme occurrences, to the different types of clouds, numerous facts are listed in bullets. The only...

Explore how sound travels as waves with a straightforward lesson that explains the basics of waves in relation to sound. The presentation considers sound waves in both open and closed pipes and shows how to calculate wavelength and...

Wow! Colorful and simple, these 160 slides introduce the various forms of energy, along with a relevant image. Some of the images are animations, which help beginning physical scientists to visualize the flow of electrons or energy! This...

Here is a suitable set of slides to use when teaching about the layers of the atmosphere, climate, global winds, and types of clouds. These slides will support a few different lectures. You will probably want to replace the diagrams with...

In 2006, about 20 percent of the world's electricity was generated from hydroelectric power. In the presentation, scholars review the water cycle and gravitational energy to begin to understand how humans harness the power of water. They...

Starting off with a definition of motion and some examples, this slide show goes on to describe different categories of movement. Terminology connected to this general physics topic is explained on subsequent slides. It is a good summary...

This machines PowerPoint reviews effort and force in relation to work and informs students about different types of machines and the different ways forces are applied and how they work to increase efficiency.

Here is a fascinating topic: the upwelling of ocean waters. Oceanography pupils learn what mechanisms cause upwelling, types of upwelling, and the effects on marine life. Colorful satellite imagery and informative diagrams bring this...

Work, energy, and their relationship to power: what is the common thread? Explore this with your class as they learn the concepts of work and energy, both kinetic and potential, before completing multiple practice problems to...

Why did lightning shock the man? Because it didn't know how to conduct itself. Presentation covers electric charges, insulators, conductors, electroscopes, lightning, generators, grounding, static electricity, and more. Presentation...

Can an area with no soil turn into a forest? Scholars learn about the process of ecological succession using an interesting presentation. It covers both primary and secondary succession in the building of new ecosystems.

Explains the different ways that metamorphic rocks can form. Looks at high temperature, high pressure, and chemically active fluids. Discusses structures created in metamorphic rocks by different forces and the classifications based on...