Calculate the weight of a car by using air pressure

By measuring the amount of surface each tire presses onto the ground and the pressure inside each tire, you can calculate the weight of a car.
(This activity is not in metric since most common tire pressure gauges are in PSI or [...]

A Mini-MagLite
3/8 inch dowel, cut to the length of a AA battery
Aluminum foil

Wrap the dowel in aluminum foil.
Unscrew the back of the Mini-MagLite and remove one AA battery, replace the battery with the aluminum-foil wrapped dowel.
Unscrew and remove the front of the Mini-MagLite.
The light will come on as [...]

One reason not all buildings are equal in an earthquake.

This device graphically demonstrates that objects of different sizes and stiffnesses tend to vibrate at different frequencies.

A sheet of cardboard measuring 1 foot (30 cm) long and several inches wide.
A large sheet of construction paper (about 14 x 20 inches [...]

Two cylinders that look the same may roll down a hill at different rates.

Two objects with the same shape and the same mass may behave differently when they roll down a hill. How quickly an object accelerates depends partly on how its mass is distributed. A cylinder with a heavy hub accelerates more quickly [...]

Objective:
To demonstrate air pressure and its effects and influences on surrounding materials.

Standards:
Structure of Earth System (atmospheric composition and properties at different elevations) and Structure and Properties of Matter (properties of solids, liquids, and gases).

Materials:
large index card, glass or cup, and water.

Procedure:
Fill the glass with water [...]