|Gravity and electromagnetism are examples of ____.
|One gallon of water has a weight (mass) of about 8.3 ____.
|Glass, rubber, wood, porcelain, and plastic are electric ____.
|Metals (silver, copper, gold, aluminum) are electric ____.
|The three ____ of matter are solid, liquid, and gas.
|Stuff made from iron or steel (an iron alloy) are attracted to ____.
|Five kilometers (km) is about 3.1 ____.
|A 132 lb woman has a mass of about 60 ____.