Wrought iron is harder than cast iron.

Blast furnaces run continuously, every day of the year, because they are hard to start and stop.

The ____ of a metal depends on the atomic mass of the atom and the atomic spacing.

The first alloy made was _____.

Hexavalent chromium is a hazardous material.

The process of wearing away material by rubbing or scraping is called _______.

Arrange the following in correct sequence: Taste cell depolarizes. Action potential stimulated in sensory neuron associated with taste cell. Food substance dissolves in saliva. Neurotransmitter released by taste cell. Food substance enters taste pore and attaches to receptor on taste hair.

Name the person who said the following: \’93He who controls the past controls the future. He who controls the present controls the past.\’94\

What was the space mission that took the first men to walk on the moon?\

In what city was the treaty signed that ended the Vietnam War?\