Cyanobacteria Introduction

What is the name of the organisms that we are learning about today?

• Cyanobacteria

• Alpha-Proteobacteria

• Water bears

• Viruses

What BEST describes the Earth's original atmosphere?

• Lots of carbon dioxide (CO2) and methane (CH4), but no oxygen (O2).

• Wet with a large amount of water vapor (H2O).

• Oxygen-rich, perfect for life to fluorish.

• Roughly the same as it is today.

How did cyanobacteria change the Earth's atmosphere?

• They filled the air with oxygen gas (O2)

• They produced large amounts of methane (CH4).

• They made holes in the ozone layer.

• They made it rain more.

Tags

MA.HS-LS1-5.

What were the consequences of cyanobacteria changing the Earth's atmosphere?

• They froze the planet and caused the oldest known mass extinction.

• They doubled Earth's biodiversity.

• They allowed bacteria to mutate faster.

• They caused massive droughts.

How do cyanobacteria continue to affect our lives today?

• Cyanobacteria produce the oxygen we need to breathe.

• Most meat is cooked with cyanobacteria.

• Cyanobacteria eat plants.

• Cyanobacteria help trees make bark.