Key Terms and Concepts in Earth Science and Evolution, Quizzes of Environmental Science

Download Key Terms and Concepts in Earth Science and Evolution and more Quizzes Environmental Science in PDF only on Docsity! TERM 1 How old is the earth? DEFINITION 1 4.5 billion years TERM 2 Major events in earth's history: DEFINITION 2 big bang- 15 billion years agoearth forms- 4.5 billion years agofirst life- 3.5 billion years agoinvasion of land- 400 million years agomodern man- 200 thousand years ago TERM 3 True or False. We evolved from apes. DEFINITION 3 False. We evolved from a common ancestor. TERM 4 In evolution, it is difficult to lose?, but it is easy to lose? DEFINITION 4 difficult to lose numberseasy to lose size TERM 5 Oldest human ancestor DEFINITION 5 Lucy- Australophitis TERM 6 How old is our solar system? DEFINITION 6 4.6 billion years (we know this because of isotopes which decay at a constant rate) TERM 7 Milky Way Galaxy (our galaxy) has how many stars? DEFINITION 7 around 400 billion TERM 8 At the speed of light, it takes ? years to travel across the milky way. DEFINITION 8 100,000 years TERM 9 Nearest galaxy= DEFINITION 9 Andromeda (2 million light years away) TERM 10 Universe= ? light years across DEFINITION 10 150 light years TERM 21 Most ingested food is used immediately for energy in... The remainder is used for.... DEFINITION 21 most used immediately for metabolism and heatremainder for growth and maintenance TERM 22 what percent of energy is lost along the food chain? DEFINITION 22 90% of energy is lost along the food chain TERM 23 Balanced ecological pyramids need more ... than ... DEFINITION 23 need more producers than carnivores TERM 24 GMOs DEFINITION 24 Geneticall Modified Organisms- not always bad, but people are afraid they are "Frankensteins" TERM 25 Organic farming DEFINITION 25 crops grown without growth hormones (pesticides and herbicides) TERM 26 Between 1960 and 2002, the average adult put on ? lbs DEFINITION 26 25 lbs TERM 27 1998-2006: obesity increased ? % DEFINITION 27 37%