|The three ____ of matter are solid, liquid, and gas.
|Metals (silver, copper, gold, aluminum) are electric ____.
|Coal, natural gas, and petroleum are types of ____.
|Five kilometers (km) is about 3.1 ____.
|One gallon of water has a weight (mass) of about 8.3 ____.
|Gravity and electromagnetism are examples of ____.
|The mass of a penny is about 2.5 ____.
|Glass, rubber, wood, porcelain, and plastic are electric ____.