Problem: In year 2200, David is an astronaut and an avid galaxy hopper from a planet hundred light years away. He ended up in the solar system in search of water. He identified three planets, planet A, planet B and planet C. Little did he know that less than a hundred years ago people used to call planet A as Earth, planet B as Venus, and planet C as Mercury. Would planet A have stronger or weaker greenhouse effect than planet B?

A: weaker

Problem: Two groups of teens studied fire for the physics class. Group S made a fire using large logs, while group F made a fire using small twigs and sawdust. Both groups used the same volume of wood. Which group made a fire that burned slower?

A: Group S

Problem: After the second world war Germany and France took two different policies in respect to taxation. After the war Germany, then West Germany, has mostly elected pro-capitalist governments. As a consequence, Germany implemented tax rate below the critical rate. But France took the other way. Their mostly pro-socialist governments implemented tax rate above the critical rate. As a result, businesses had to make informed decisions while doing business in these countries. Which country would see increasing government revenue, Germany or France?

A: Germany

Problem: Pam and Mary were two gardener friends. They both had some aphid infestations, but Mary had more aphids on her farm, so she used every method and insecticide available to get rid of them, with limited success. Which farmer didn't spray plants thoroughly with a strong water jet?

A:
Pam