Earth Key Dates- notes review

Nebula exploded and made the sun

• 4.6 bya

• 4.5 bya

• 4.2 bya

• 4.6 mya

Nebula exploded and made the sun + planets

• 4.6 bya

• 4.5 bya

• 4.2 bya

• 4.6 mya

our sun + 8 planets were created

• 4.6 bya

• 4.5 bya

• 4.2 bya

• 4.6 mya

What was not created 4.6 billion years ago

• Earth

• Sun

• Moon

• Life

Oceans on Earth formed

• 4.6 bya

• 4.2 bya

• 4.0 bya

• 3.8 bya

Earth cooled and no longer was a hot lava rock

• 4.6 bya

• 4.2 bya

• 4.0 bya

• 3.8 bya

Cyanobacteria does

• Photosynthesis

• Respiration

Cyanobacteria puts out _____ gas into the atmosphere

• Oxygen

• Carbon Dioxide

Which gas made the Earth cooler 4 billion years ago?

• Oxygen

• Carbon Dioxide

The first living thing formed

• 4.6 bya

• 4.2 bya

• 3.5 bya

• 3.8 bya