6 Written questions
6 Multiple choice questions
- a period in the geological time scale beginning when the Earth originated, 4.6 million years ago, and ending when complex organisms appeared, about 540 million years ago- no oxygen in the atmosphere and all creatures lived in the ocean to escape harmful UV rays. Prokaryotes only exsisted. They were anaerobic. Then, cyanobacteria (photosynthetic organisms) began to produce oxygen that seeped through the water, into the atmosphere, and formed the ozone layer. Eukaryotes began to develop.
- determining whether an event or object, such as a fossil, is older or younger than other events or objects
- mass extinction of most of a species
- a species of hominid that lived in Europe and Western Asia from 230,000 years ago to about 30,000 years ago
- family referring specifically to humans and several extinct human-like species, some of which were human ancestors, 4.4 million years ago
- estimating the age of a sample or event in years , usually by measuring the amount of unstable atoms in the sample
5 True/False questions
What was the first organism on Earth? → opposable thumbs, opposable big toes in all primates except humans, 5 fingers, binocular vision
Cro-Magnons → a species of humans with modern features that may have migrated out of Africa 100,000 years ago and eventually into every continent
What are the characteristics of primates? → prokaryotic cells and then cyanobacteria
Prokaryote → a cell that contains a central nucleus and a complicated internal structure
Paleozoic Era → the period in the geologic time scale beginning about 540 million years ago and ending about 248 million years ago- fish, sponges, corals, snails, clams, squids, and trilobites were abundant. Plants, fungi, and aerobic organisms colonized on land. Creepers began to crawl on land.