SELS Activities

Bending and Torque Activities: 
Bending is a force which causes a material to deform around a central axis. Bending can also cause tension and compression, so all of these forces are related. Torque can be thought of as a twist to an object. It causes a material to rotate around an axis or pivot.

The activities below help illustrate these topics:
* Foam Bricks Activity
* Nut and Bolt Tension Activity

Conduction Activities:
Heat travels along a metal handle by means of conduction. The more heat there is in a material the faster the particles are moving. All materials conduct heat, even wood. Understanding conduction can help you slow down heat loss from your home and save you money and also keep you more comfortable.

The activities below help illustrate the concept of conduction:
* Chemical Reactions in Construction Activity
* Everyday Heat Transfer Activity
* Heat Resistant Glass Activity
* Speed Melting Activity
* Wall R Activity

Convection Activities:
Moving air is generally thought of as convection. When you open a hot oven, hot air rises into your face. Rising hot air is called convection. When you open a refrigerator in you bare feet, you can feel the cold air falling against your skin. This falling cold air is called convection. Knowing how convection works will help you keep your home more comfortable and save you money.

The activities below help illustrate convection:
* Speed Melting Activity

Distribution Activities:
Electricity is generated at high voltages and is distributed to substations to be reduced in voltage for use in homes, schools, and businesses. Because electricity can be harmful if not treated appropriately, the process of distribution involves different levels of protection. Understanding how electricity is distributed to your house can help protect your home, protect you from injury, and also save you money.

The activities below help illustrate the concept of distribution:
* Household Electric Circuits Activity (Part 1)
* Household Electric Circuits Activity (Part 2)
* Insulation Activity
* Watt’s Up Investigation Activity

Engineering Design Activities:
(Will be posted soon)

Generation Activities:
Electricity generation is the process of generating electrical power from other sources of primary energy. Electricity itself is generated by the movement of a loop of wire, or disc of copper between the poles of a magnet.

The activities below help illustrate the concept of generation:
* Battery and Wire Motor Activity

Radiation Activities:
Heat and light are two forms of radiation that we experience every day. Light from the sun comes in through the windows of your house and is absorbed by furniture, walls, and floors and is reradiated as heat. This can feel good in the winter but may make your house or a room too warm in the summer. Understanding radiant energy like heat and light becomes important for learning how to make your home more comfortable and also save money on heating and cooling bills.

The activities below help illustrate the concept of radiation:
* Speed Melting Activity
* Tricks with a TV Remote Activity

Shear Activities:
Shear is a force caused by an external load which causes two segments of a body to slide over each other. As demonstrated in the Shear video, if you had a foam brick and pushed the top part to the left and the bottom part to the right, the foam brick would experience a shear force.

The activities below help illustrate the concept of shear:
(Will be posted soon)

Tension and Compression Activities:
The two “main” forces engineers must design structures to endure are tension and compression. Tension is the force which causes a material to stretch, or be pulled. Compression is the force which causes a material to shorten, or be pushed.

The activities below help illustrate the concepts of tension and compression:
* Construction Beam Activity

Usage and Safety Activities:
Understanding the principles of electricity will help you be wiser about how you use electricity, which can save you money. Knowing how electricity works will also help you make electrical devices more dependable and work better. Knowledge about the principles of electricity will also help you protect you and your family and your home from harm.

The activities below help illustrate the importance of safety when it comes to electricity usage:
* Battery and Bulb Activity
* Circuit Breaker Panel Activity
* Grounding and Protection Activity
* Insulation Activity