A. Answer the following questions briefly: 1. What is an alloy? How did the discovery of iron help early man?
2. Who invented the steam engine? What was its use?
3. What do you mean by Industrial Revolution? What were its effects?
4. Name any three alternate sources of energy.
5. What is biogas? How is it used?​

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Choose the best example of an indirect confrontation for the following situation: peter, a local school board member hired john whom owns a local print shop to make custom t-shirts for his son's basketball team, the ravens. they are about to play their final game of the year and are having a party to celebrate their semi-finalist rankings. unfortunately, the printer made a mistake and printed on red/blue shirts instead of black/blue which are the team's actual colors. peter explains to john that the team's colors are black/blue instead of red/blue and asks john what he thinks they should do. peter explains to john that the team's colors are black/blue and demands that john re-print the shirts on the correct colors. peter agrees to take the red/blue shirts but then posts a negative yelp review on john's business. peter agrees to take the red/blue shirts but tells everyone he can in the school about the incident and tells them not to buy from john. peter rejects the shirts and files a lawsuit to attempt to recover the down payment he made to john.

Which of the following has been the result of clean water supplies, greater availability of medicines, and improved vaccines? a lower crude birthrates b. fewer women working outside the home c. higher levels of education d. longer life expectancies