To safely control the traffic flow and protect workers near public roadways and moving construction equipment use you could use

Explain how earth is like a giant bar magnet. how is our magnetic field made?

Prompt what is your personal ideology? give your opinion on the three following topics. justify your support or opposition to each issue by using examples. issue one: should the government have the right to place a high tax on soda to discourage its consumption and fight teen obesity? issue two: should the government be allowed to monitor your actions on the internet to keep the nation safe from terrorism? issue three: should the government be allowed to outlaw texting while driving to keep drivers safer on the road?

What are spirit and opportunity designed to do?