The History of Life on Earth

The science of organisms and the interaction between them and their environment is known as _________________________.

• biology

• pathology

• embryology

• ecology

• physiology

The study of living things is known as ________________.

• pathology

• physiology

• biology

• embryology

   

• ecology

How long has Earth been around for?

• 1.5 bya

• 3.5 bya

• 2.5 bya

• 4.5 bya

When did water first form as a body of water?

• 3.4 bya

• 4.4 bya

• 1.4 bya

• 2.4 bya

The first life on earth was ___________.

• a bundle of nucleotides such as viruses

• a collection of chemicals surrounded by a membrane

• prokaryotic lifeforms

• eukaryotic lifeforms

The first living things creatures were prokaryotes similar to __________.

• protists

• archae

• eubacteria

• eukaryotes

3.9-3.5 bya is when the ________ eon took place.

• phanerozoic

• cenozoic

• archean

• proterozoic

What eon are we currently in?

• cenozoic

• phanerozoic

• archean

• proterozoic

What is thought that change the amount of oxygen found in the atmosphere that made it so that more lifeforms could come to existence?

• cyanobacteria

• zooplankton

• archaebacteria

• photoplankton

What percentage of increase in oxygen did Earth experience?

• 15%

• 20%

• 5%

• 10%