SCI 200--Unit 1 Challenge 2 Questions and Answers Already Passed

According to the one-year calendar model based on the Big Bang theory, the solar system was created in ___________. a.) January b.) December c.) August d.) September c.) August According to the one-year calendar model based on the Big Bang theory, which of the following events happened on December 31st? a.) Modern humans first appeared. b.) Life appeared on Earth. c.) The Big Bang occurred. d.) The solar system was created. a.) Modern humans first appeared. According to the one-year calendar model based on the Big Bang theory, which of the following events happened in September? a.)Homo sapiens appear on Earth. b.) The solar system comes into existence. c.) Life appears on Earth. d.) The Big Bang occurs. c.) Life appears on Earth. Some early life forms developed photosynthesis, which released free oxygen. When oxygen is impacted by UV radiation, it forms __________. a.) sulfur dioxide b.) ozone c.) oxygen d.) water b.) ozone Which of the following events relates to the earth's atmosphere after life began to form? a.) Intense volcanic activity and meteorite strikes were common. b.) UV radiation and lightning provided energy for molecular formation. c.) There was no free oxygen in the atmosphere. d.) Photosynthesis created levels of oxygen toxic for some organisms. d.) Photosynthesis created levels of oxygen toxic for some organisms.